Fixed-price sprints. Direct Google Space or Slack access. Production-ready code delivered every sprint. We build custom MVPs, autonomous AI systems, and scalable web platforms that actually ship.
You work directly with the developers writing your code. We don't have junior benchwarmers, business analysts, or endless discovery billing.
Every developer on your sprint has 7+ years building real production systems. Saif, Hamza, and Farhan review every architecture decision and pull request.
No open-ended hourly billing. Before sprint one starts, you get a written scope with an exact price ceiling. If we finish in fewer hours, you pay less. Never more.
We stand behind what we ship. If any defect or regression surfaces in our delivered code within 6 months, we jump in and fix it fast at zero charge.
We don't close your deal and pass you down to a subcontractor. Saif, Hamza, and Farhan run the sprints and push the commits.
The founders
Working together since 2019 · California and Türkiye
Sinan Sari
Co-Founder & CEO
Serdar Pehlivan
Co-Founder & CTO
Saif Akhtar
Co-Founder & COO
Every Friday, you get a staging link and a video walkthrough showing working software shipped that week. No slide decks.
Quick Loom videos and concise bullet points on what merged today, what’s up next, and blockers solved. No meeting bloat.
Got an architectural question or pivot? Message us directly in Slack. You get immediate answers from the people writing the code.
You own 100% of the IP, Git commits, Dockerfiles, and CI/CD automation from day one. You can hand it off to an internal team anytime.
Fixed-price sprints, guaranteed cost ceilings, and a 6-month written warranty. Here are the core high-ROI ways we partner with founders and engineering leaders.
From whiteboard to live paying users in 30–60 days. Built in modern React, Node, and Postgres with clean CI/CD, 100% IP ownership in your GitHub, and guaranteed hard cost ceilings.
Production-ready React, Node & Postgres build
Weekly shipped demo builds & direct Slack access
Automated CI/CD pipelines & Docker containerization
100% IP ownership assigned directly to your GitHub
6-month written warranty on all delivered code
Deploy production LLM pipelines, autonomous reasoning agents, and proprietary workflow automation directly into your product. Fast inference, low latency, and enterprise-grade reliability.
Production RAG pipelines & context vector memory
Multi-agent reasoning loops & tool orchestration
Fine-tuning, local LLM deployment & prompt caching
Token budget ceilings, latency & cost guardrails
Fixed-scope pilot with clear production acceptance
Validate your UX with a clickable 14-day interactive Figma prototype before spending $20k+ on code ($2,500 fixed). Or test our senior team with a $0 Free Backlog Sprint on one stuck ticket.
14-day interactive clickable Figma prototype
Full user journeys, UX edge cases & dev handoff specs
Yours to keep 100% whether you build with us or not
$0 Free Backlog Sprint: test us on 1 real stuck ticket
Senior engineering review within 48 business hours
Scoped by an engineer who'll actually build it. You get a written scope, an hour range with a hard ceiling, and an honest “we're not the right fit” if we're not. No drip campaign.
From venture-backed marketplaces to enterprise AI platforms. Here is production software we took from concept to live deployment.
Engineered an autonomous multi-agent AI system, automated reasoning pipelines, and responsive UI for venture-backed enterprise startup.
Architected high-concurrency booking, live streaming, and Stripe billing pipelines handling millions in GMV across global fitness studios.
Automated delivery-order routing into POS systems, reducing manual entry and related errors.
Commercial film equipment rental marketplace with live gear calendar, deposit escrow, and Stripe Connect payouts.
Reduced manual processing overhead while making releases faster, more predictable, and more stable.
Turned approvals and policies into product features and improved trust through trainer verification.
Real founders who trusted us with their core architecture and shipped on time.
“This was my second startup with Horizon Labs and they proved to be the right partner again. Fast execution, direct communication, zero overhead.”
“Very professional, allowed us to move faster than our in-house team could manage with growing backlogs. Very satisfied with their engineering work.”
No legal jargon. How we handle IP ownership, communications, sprint pacing, and code warranties.
What happens if the project goes over the estimated hours?
You don't pay more. The contract states an hour range, and the maximum is the most you'll ever pay for the agreed scope. New scope added along the way is quoted separately before building.
Who owns the intellectual property and code?
You do. All work happens directly in your GitHub organization, and all IP is assigned to you under a standard US contract.
Can you work with our existing codebase?
Usually, yes. We conduct a free architectural review first and give you an honest appraisal of whether we can accelerate your repo under standard terms or if a rebuild makes more sense.
What does the 6-month warranty cover?
Any bug or defect in code delivered by our team is fixed fast at zero additional cost for 6 months after delivery (6–12 months on hourly engagements).
Whether you need a high-throughput web platform, an autonomous AI pipeline, or a two-sided marketplace, we deploy engineers who've built it before.
Next.js, React, Node.js, TypeScript, and PostgreSQL. We build clean, modular architectures with automated CI/CD and weekly staging demos so you can ship without technical debt.
Python, FastAPI, LangChain, and vector embeddings. We engineer production-grade AI systems with deterministic validation, fallback logic, and human-in-the-loop controls.
Official Sharetribe partners. Custom React frontends, Stripe Connect split payouts, instant and availability-based bookings, and custom messaging workflows.
Grab 20 minutes directly with Saif. No sales pitch, no junior reps—just an honest technical breakdown of your tech stack, scope, and timeline.
We take you from architectural whiteboard to live paying users in 4 weeks. Fixed price, senior developers only, and working code you own completely.
Every estimate gives you an hour range with a hard ceiling. You never pay more than the ceiling. If the scope doesn't make sense, we'll tell you. We'd rather talk you into a smaller build than sell you a bigger one.
Tell us what you're building. After an intro call with our founders, you'll hear back within 72 business hours: a written estimate with an hour range and a hard ceiling, or the questions we need answered first. Free.
The front door. Before you commit to a build, see it: clickable wireframes of your marketplace or MVP at a fixed price, delivered in 14 days. Yours to keep whether or not we build it.
Clickable high-fidelity wireframes in Figma
Complete user journey & edge-case flows
Technical architecture & data model outline
Fixed-price implementation plan & timeline
Delivered in 14 days — yours to keep
Most land around $20,000. A focused MVP with core transactions sits at the lower end; full platforms with payments, messaging, and admin tooling sit higher. Guaranteed hard cost ceilings.
Production-ready React, Node & Postgres build
Stripe Connect escrow & split payment flows
Automated CI/CD pipelines & Docker deployment
100% IP ownership in your private GitHub repo
6-month written warranty on delivered code
Template and custom-extended builds on Sharetribe. From zero to live marketplace in weeks with custom transaction flows, listing types, and third-party integrations. Most land around $10,000.
Custom transaction processes & listing types
Multi-vendor onboarding & Stripe integration
Third-party API & analytics integrations
Custom front-end design & branding extension
Go-live launch support & admin handoff
AI research, production ML/LLM systems, embedded/IoT firmware, and cloud performance. Full-stack & backend engineers at $100–120/hr. Typical fixed-scope pilot runs ~$5,000.
Senior AI/LLM, systems & embedded specialists
Direct Slack & daily commits inside your repo
No minimum commitment — scale up or down weekly
Rigorous code reviews & automated test coverage
Typical pilot runs about $5,000 fixed
Move off fragile WordPress & WooCommerce setups onto modern, scalable platforms built for multi-sided transactions. Clean data migration with zero downtime. Most land around $15,000.
Zero-downtime user, product & order data migration
Modern performant stack replacing fragile plugins
SEO redirect preservation & schema continuity
Custom payment & checkout flow modernization
Thorough staging validation & launch verification
Technical growth infrastructure: automated outbound, data pipelines, CRM sync, conversion tracking, and high-converting landing systems built directly into your stack.
Automated enrichment & outbound data pipelines
CRM bi-directional sync (HubSpot, Salesforce)
Full-funnel attribution & conversion analytics
High-converting programmatically-generated pages
Continuous experimentation & pipeline monitoring
The form takes about five minutes.
Saif and Serdar walk through it with you and ask what the brief doesn't say.
Your written estimate, an hour range with a hard ceiling, or the follow-up questions we need answered first. Build with us or take it elsewhere. It's yours.
Every engagement runs on the same paper trail. These are sanitized samples from real client work. Open any of them to see exactly what you will receive on your project.
The contract, scope and hard hour ceiling you would sign.
Every two weeks: hours used, work shipped, decisions you need to make.
Milestones, priorities and hours burned against the ceiling.
Where every deliverable, decision and asset lives, in your account.
What shipped, where it lives, and what the 6-month warranty covers.
Tell us what you're building. A call with our founders, then an estimate in writing. Free.
Most agencies quote low, then bill the difference. We do the opposite. Every contract states an hour range; past the maximum, we finish the agreed scope at no extra cost. Fixed-price projects are paid in installments tied to delivery, with the warranty in writing.
Week 0
A 30-minute call with someone who can actually scope your project, not a sales rep. Bring your idea, your codebase, or your backlog. If we're not the right fit, we'll tell you on this call and point you somewhere better.
Within 72 business hours of the call
We map your screens, workflows, and edge cases, then send a written estimate: scope, an hour range, and a hard ceiling. Already have a codebase? We review it free and tell you honestly whether we can work with it.
Week 1
You contract directly with our US company. The contract lists milestones, deadlines, and the hour range. The maximum in that range is the most you'll ever pay for the agreed scope; if we go over, the overage is on us.
The day after signing
Work runs in two-week sprints. Kickoff is usually the day after you sign. You see working software every single week while it grows.
Launch
Documented, security-reviewed, and SEO-ready. You own every line of code in your own GitHub org.
6 months after
If anything we delivered breaks, we fix it free. No ticket triage games, no "that's out of scope."
It comes down to three things: cadence (how we communicate), access (what you can see and touch), and estimation (how we price).
Every week we open the live app and click through it together while we take notes. The product itself is the status report.
Bi-weekly progress reports and monthly financial reports, prepared personally by your delivery lead: what shipped, what's next, and where the budget stands.
Our teams overlap 6am–6pm Pacific, whether your engineers are onshore in the US or nearshore in Türkiye. US management on every project.
Every request, bug, and idea lives in one tracker you can see. "In progress" means we're on it; "resolved" means it's live in production, often within hours of the fix.
You get a staging environment (with test payment cards where relevant) so you can QA features the same day we ship them.
You talk to the engineers building your product, not an account manager relaying messages.
We define "done" in numbers: users, dates, a demoable scope. Risks in plain English, trade-offs shown. Unknowns become a short discovery sprint instead of open-ended hours.
Your delivery lead walks your wireframes feature by feature before anything is priced, and flags what isn't worth building yet. Founders regularly leave scoping calls with a smaller, better plan.
Only the phase ahead of you is estimated in full detail; later phases carry capped estimates that come down as decisions firm up. You never commit to hours nobody can honestly predict yet.
Hour range with hard ceiling
capped
Overage beyond ceiling
on us
Payments tied to delivery
~6 milestones
2-week trial, not happy
don't pay
Contract & IP
US / California
Warranty, fixed-price / hourly
6 mo / 6–12 mo
Surprise invoices
$0.00
Milestone 6: delivery & approval
paid on approval
Hours used vs ceiling
under ceiling
Overage billed
$0.00
Repo & IP transfer
complete
6-month warranty
begins at delivery: in writing
Anything after this invoice
$0.00
The product with which Horizon is helping us is an industrial manufacturing device... We had previous sets of contractors who each made an attempt to get real-time-like performance from the Android front end. They were abysmal failures. Horizon's Gorkem Bendin understands the tradeoffs required for real-time embedded processing and is able to write Android code that partitions the expensive computations outside the fast loops and allows our code to offer timely information to the users of our product. Highly recommended.
Andrew Ward · MK Products · ISO-certified welding-products manufacturer
products shipped since 2019
businesses scaled from 0 to exit
on Clutch, across 9 verified reviews
team handoffs since 2019
Serdar and Sinan have known each other since high school. Saif met Sinan on Reddit in 2018. In 2019, Serdar helped Sinan build Cuboh (YC S19), the startup Sinan later sold. The engineers who shipped Cuboh never left: they're the same people managing delivery on client projects today. We didn't assemble a team for this agency. We kept one that already worked.
YC alum with multiple exits and a CTO background. Sinan sets the technical bar, and is the reason many clients found us: founders he's worked with keep sending their friends.
Serdar runs every engagement: project management, product management, and team tracking. When you hire us, he's accountable for your milestones, the same role he played building Cuboh.
An ex-VC building startups since 2010. Saif covers everything non-technical: contracts, go-to-market support, launch planning, and product management.
Usually Serdar leading delivery alongside your assigned engineers, and Saif on business support. If you're looking for quick, cheap labor that says yes to everything, we're a bad fit. If you want a technical partner that will tell you when your approach is wrong, before you pay for it, we should talk.
You don't pay more. The contract states an hour range, and the maximum is the most you'll ever pay for the agreed scope. New scope you add along the way is quoted separately before we build it.
You do. All work happens in your GitHub org, and your IP is assigned to you under a US contract.
Usually, yes. We review it free first and tell you honestly whether we can work with it under our standard terms, or whether a rebuild makes more sense.
Management and leadership are in California. Engineers are onshore in the US or nearshore in Türkiye.
Any defect in code we delivered, for 6 months after delivery (6–12 months on hourly engagements). It doesn't cover scope changes or third-party services breaking their own APIs; we quote those separately.
Within 72 business hours of the intro call you get your written estimate, or the follow-up questions we need answered first. Once you sign, kickoff is usually the next day.
Yes, deliberately. Senior engineers use AI to cut delivery time without cutting quality; it's why our fixed prices run about half our standard hourly equivalent. Client code only touches AI in secure environments.
Tell us what you're building. After an intro call with our founders, you'll hear back within 72 business hours: a written scope with an hour range and a hard ceiling, or the questions we need answered first.
Call, text or email a founder directly, or pick a time on the calendar below. Want a written estimate with a hard ceiling instead? That takes one form and an intro call with the founders.
A boutique California agency with developers in the US and Türkiye. We built our first Sharetribe marketplace in 2022 and joined the Expert network in 2023. Choose discounted fixed-price Sharetribe packages or estimated development hours. We also provide hands-on Sharetribe training.
Milestone contracts, US hours
IP protected under US law
6-month warranty on all delivered code
Free codebase review on every rescue
Fixed-price packages for founders who want a clear launch scope and a US company standing behind the work. If the custom scope is estimated instead, development is $120/hr under 250 hours/month or $100/hr over 250. Estimates and clarification meetings are free.
Interactive clickable Figma prototype before committing to code. Full user flows, transaction logic, and launch-ready scope.
14-day turnaround with milestone check-ins
$1,250 at signing · $1,250 on approval
User flows, transaction logic & onboarding
Launch-ready feature scope specification
100% yours to keep whether you build with us or not
Launch your marketplace in 30–60 days using native Sharetribe capabilities. Ideal for speed-to-market with clear US contract backing.
Launch in 30–60 days
Native Sharetribe capabilities configured
Milestone-based payment schedule
IP protected under American contracts
Warranty on the delivered marketplace
Full-stack custom features, unique checkout flows, and 3rd-party integrations on Sharetribe. Built for scalability from day one.
Launch in 60–90 days
Custom features, integrations, workflows
Milestone-based payment structure
6-month warranty from day one
Dedicated project lead and weekly demos
Changes, fixes, integrations, and rescues for live Sharetribe marketplaces are $120/hr under 250 hours/month or $100/hr over 250, billed every two weeks. Every rescue starts with a free codebase and console review. The optional written Rescue Audit is $1,500 and includes findings, priorities, and an effort estimate you keep.
On-demand senior engineering for live Sharetribe marketplaces. Sprints with hard hour ceilings and zero surprise billing.
Free codebase review & technical audit
Optional $1,500 written Rescue Audit
$100/hr over 250 hrs · $120/hr under 250
Billed every two weeks with itemized hours
Keep your codebase & documentation forever
Move your live marketplace off brittle WordPress and WooCommerce plugins onto a dedicated transactional Sharetribe infrastructure.
Preserve all historical user & transaction data
Clean architecture replace fragile WP plugins
Fixed migration milestone scope
Zero downtime cutover strategy
Full documentation and team handover
Technical growth engineering: SEO architecture, automated content publishing, AI workflows, and analytics for marketplace supply and demand.
Automated supply acquisition pipelines
Programmatic SEO landing page engines
Data enrichment and CRM synchronization
Analytics, funnels and conversion tracking
Bi-weekly growth sprint cycles
A WordPress site that couldn't scale to season passes and dynamic pricing, fully migrated: gift cards, variable pricing, admin controls, complete data migration. Launched, #1 on Google in its niche, then acquired.
Scope locked in writing before work begins
Milestone payments, with a free codebase review first
Your marketplace stays in your own Sharetribe account
“Horizon Labs feels like part of our company, even though they're outsourced. They have a strong skill set and are proactive about getting things done.”
Shraysi Tandon · Co-Founder & CEO, Kidsy · built on Sharetribe
We built and scaled our own marketplace MVP on Sharetribe in 2022 before the Sharetribe team invited us into their Expert network. We've since delivered around seven Sharetribe marketplaces: idea to launch to acquisition, plus migrations from Shopify, WordPress/WooCommerce, and Webflow. Same approach every time: launch the smallest useful version, keep you in control of code and budget, extend only when it pays.
Yes: that's most of the rescue lane. We review the codebase free first and give you an honest verdict on what's salvageable before you commit to anything.
You do, throughout. Your marketplace lives in your Sharetribe account, and all work happens in your repo. Nothing we touch changes your ownership.
Your Sharetribe account and its code stay yours regardless. Sharetribe can help restore access and connects operators with new Experts when the last one wasn't a fit. We've picked up mid-project more than once.
Reliable availability, calendar sync, and buffer times so double-booking doesn't happen. Deposits and check-in/out photos reduce disputes. Owners see simple dashboards and on-time payouts; renters see fees up front.
People buy time and expertise, not forms. Simple scheduling with instant book or request-to-book, provider profiles that show proof of quality, and reviews that matter. More completed bookings, more repeat work.
Rich listings with the right attributes, tuned search and filters, carts that handle variations, sellers with bulk upload and predictable payouts, plus tax, shipping, and returns set up correctly.
Lessons, events, equipment, or B2B: quotes and approvals, group sizes, waivers, delivery zones, tiered pricing, invoicing with payment terms. Sharetribe gives the foundation; we add only what your model needs.
A student freelancing marketplace. The MVP had to validate supply, demand and pricing quickly without overbuilding.
A curated experiences marketplace turning sick days into personalized outings guided by local adventure pros.
Connects Speech-Language Pathology trainers with trainees. Certification verification and admin approval built into the product.
A resale marketplace for open-box and gently used kids' gear. Our first Sharetribe build, launched in 2022.
A two-sided marketplace connecting boat owners with renters, simplifying bookings and yacht charters.
A peer-to-peer platform for the art department and set decoration community to rent and share props, delivered across structured rapid development sprints.
A multi-track marketplace connecting race teams, drivers, and sponsors with Shop, Book, and Partner tracks, Make Offer, and Stripe Connect.
Bring us a live marketplace that's stuck or an idea that isn't built yet. An expert who has shipped, migrated, and rescued Sharetribe marketplaces will scope it honestly, in writing, within 72 business hours of your intro call.
FREE · SHARETRIBE EXPERT PROFILE ON EXPERTS.SHARETRIBE.COM
Scoped by an engineer who'll actually build it. You get a written scope, an hour range with a hard ceiling, and an honest “we're not the right fit” if we're not. Prefer to talk first? Call, text, email, or book a call.
• Immediately: instant confirmation your brief arrived
• Day 1: an engineer (not a bot) picks up your brief and replies to set up your intro call
• After your intro call with our founders: within 72 business hours, your written estimate (scope, hour range, hard ceiling) or the follow-up questions we need answered first
A free trial from Horizon Labs for teams with existing codebases. You pick one stuck feature, stubborn integration, or high-priority bug. We audit what it takes, write the plan, build it in your repo, and ship it tested and documented.
We only take on trials where we can ship production-grade code within a single sprint.
Tell us what's blocked, your tech stack, and what 'done' looks like.
We confirm fit and provide a technical execution plan with delivery date.
Senior engineers write commits in your repo with direct Slack access.
Delivered with tests, video walkthrough, and handover documentation.
24h turnaround • $0 • Case-by-case acceptance
On a mission to help teams like ours build software fast and efficiently, without the drama.
Sinan (CEO) and Serdar (CTO) have known each other since high school and went to university together. Both became software engineers and kept working together on projects in Türkiye. When Sinan moved to the U.S. for Y Combinator with Cuboh in 2019, he leaned on Serdar to build and manage his offshore engineering bench back in Türkiye. After exiting his YC startup, other startups began asking Sinan to act as a fractional CTO and help them hire reliable engineers. Sinan and Serdar formalized the model and started Horizon Labs. Many of the same engineers who joined them in those early years are still with us today: as managers. Saif (COO) joined in 2022 to run customer success and sales; at our core we are a devshop that builds custom software products.
Book time directly with a founder: Sinan Sari, Co-Founder & CEO · Saif Akhtar, Co-Founder & COO
Co-founder & CTO of Cuboh (YC S19), senior engineer at Tasso & Oscar Health, co-founder at Kidsy. Healthtech & marketplace projects. B.S. Computer Science, Bilkent.
Math Olympiad medalist, PhD in Computer Engineering (UConn), ex-Vice Dean of Engineering. Prepares every proposal, bi-weekly report, and financial report personally.
Bridges client business objectives and our technical teams; crafts the user stories engineers build from. B.S. Computer Science, Bilkent; M.A. Graphic Design.
Full-stack web, mobile, and embedded developer, 9+ years across startups and enterprises. Oversees the code we deploy for clients. B.S. Computer Engineering, Erciyes.
Visual storyteller: 10+ years as photographer, videographer, and illustrator before UI/UX. Designs for our clients and incubated projects. B.S. Social Sciences, IBA.
Early employee, co-founder, investor/VC, and advisor across startups. Most recently founding team at Cresance (StartX & Alchemist). B.S. Mechanical Engineering, SJSU.
Ship the smallest version that proves value. Define acceptance criteria, cut nice-to-haves, launch in weeks so real usage guides the roadmap.
Decisions come from conversations and logs. Engineers join calls, we instrument key events, and we change course when the data says so.
Proven tools with clear upgrade paths. Defaults first, optimization when it pays. Reliability beats novelty every time.
Small PRs, tests, linting, monitoring. ADRs and plain docs so your team can run the system without us.
Milestone estimates, open trade-offs for faster vs cheaper, reuse where it makes sense. Fixed-price where scope is clear.
We don't measure relationships in contracts. Six-month warranty minimum, and we're available to help transition or fix what breaks.
Love to learn, solve problems, and want to work with startups on cool tech? We'd love to work with you. United States or Türkiye only.
We're a small senior team, so every hire works alongside a founder and ships to real clients from the first week. Remote from the United States or Türkiye, with overlap on US Pacific hours. Pick a role below to see what you'd deliver in your first 90 days.
There are no open roles right now. Check back later for future opportunities with Horizon Labs.
A representative sample of our senior engineering talent. Each team member has been with Horizon Labs for multiple years and has delivered projects across a wide range of domains. We can scale or adapt the team structure as needed, from Türkiye's top engineering pool.
The information below is a representative sample of our senior engineering talent and their capabilities. Each team member has been with Horizon Labs for multiple years and has successfully delivered projects across a wide range of domains. Their availability will be planned in coordination with active engagements, and we can scale or adapt the team structure as needed. The engineers featured here reflect the highest standards of our organization, combining strong technical depth with product thinking, clear communication, and consistent ownership. We are confident in their quality and can provide senior talent of this caliber from Türkiye’s top engineering pool.
Our lead engineers combine deep technical expertise with leadership and product thinking. They not only guide teams in delivering high-quality solutions but also act as partners in shaping product strategy and ensuring engineering excellence.
Ph.D. in Computer Science with a proven academic and applied foundation.
Successfully delivered 40+ projects over the past ~5 years with us since Day 1, spanning AI-driven applications, large-scale platforms, and rapid MVPs. Ex-academician, two patents holder and Springer book writer. He has been with Horizon Labs since Day 1.
15+ years of experience as a Full-Stack Engineer with a broad technical spectrum.
Architected and delivered solutions across frontend, backend, embedded systems, and mobile, a true “Swiss knife” engineer who has been with Horizon Labs since Day 1.
Our AI engineers combine advanced academic backgrounds with hands-on expertise in data science, machine learning, and applied AI. They are fluent in the latest trends, including language and vision models, and have a strong track record of translating research into production-ready solutions.
Ph.D. in Mathematics with a Data Science specialization.
Extensive work with cutting-edge language and vision models, contributing to the current wave of AI innovation.
M.Sc. in Physics with a Data Science background.
Over 8 years of hands-on experience working with machine learning models, from traditional algorithms to modern deep learning architectures.
Our DevOps expertise ensures that products are not only well-built but also scalable, secure, and easy to maintain. With a strong foundation in cloud infrastructures and modern automation practices, our DevOps engineer bridges the gap between development and operations, accelerating delivery while maintaining stability.
8+ years of professional experience in DevOps and infrastructure engineering.
Extensive hands-on expertise with cloud infrastructures (AWS, Azure, GCP). Strong proficiency in containerization technologies (Docker, Kubernetes). Skilled in monitoring, performance tuning, and cost optimization of cloud resources. Designed and architected big data–centric systems, ensuring scalability and reliability. Capable of building and maintaining end-to-end CI/CD pipelines for modern software projects.
Our full-stack JavaScript engineers sit at the intersection of product, design, and engineering. They are responsible for turning ideas into polished, user-facing experiences while ensuring that the underlying systems are scalable, maintainable, and production-ready. With a strong command of the modern JavaScript ecosystem, they play a key role in delivering end-to-end functionality across web platforms.
8+ years of professional experience in modern web development with deep specialization in the JavaScript ecosystem across both frontend, backend, and mobile development.
Hands-on experience delivering multiple production-grade applications across web and mobile platforms, covering the full lifecycle from feature design to deployment and iteration.
Our engineers form the backbone of our development capability, combining versatility with a strong record of delivery. Over the past three years, this team has successfully delivered numerous projects across different domains, consistently meeting quality and timeline expectations. They are fully proficient with React and TypeScript on the frontend and bring deep expertise in backend technologies including Node.js, Python, and C#. This breadth allows them to adapt to different architectures and integrate seamlessly into complex systems. We offer a balanced mix of experience levels, from developers with 2+ years of focused, hands-on delivery to senior engineers with 8+ years of expertise in building, scaling, and maintaining production-grade systems. Together, they provide both the velocity to deliver features quickly and the experience to ensure long-term quality and stability.
Thirty minutes with someone who can actually scope your project. Prefer to write it down first? Send the estimate form and we'll set up the call from there.
Companies of all sizes in healthtech, e-commerce, marketplaces, AI, and more. We are tech-agnostic: we work around your stack or build one from scratch.
Verified client case studies portfolio (30 projects across AI, Healthtech, Fintech, and Marketplaces).
Work delivered under NDA across 13 enterprise and stealth startup engagements.
Prototype, design, full-stack build, and launch support from the same senior team since 2019. Choose fixed scope or estimated hours: under 250 hours/month is $120/hr; over 250 is $100/hr. Estimates and clarification meetings are always free.
Free · scoped by an engineer, not a sales rep · analogies welcome
Bring your ChatGPT, Lovable, or Base44 prototype, or a napkin sketch. We review it free, tell you honestly what's salvageable, and turn it into a documented, security-reviewed, SEO-ready product with a 6-month warranty.
$120 /hour
For evolving scope or a staged launch
Written hour range with a hard ceiling
Pay only for approved development hours
Billed every two weeks
Same senior team through launch
$100 /hour
Volume rate above 250 development hours/month
Parallel product and engineering workstreams
Written hour range with a hard ceiling
Billed every two weeks
6-month warranty on delivered code
Quoted before work begins
Prototype, product design, full-stack build, and launch support
Acceptance criteria and milestones agreed in writing
Product wireframes available from $2,500
Free estimate and clarification meetings
6-month warranty on delivered code
“One of our clients spent two years with a larger team trying to ship their MVP. Two of our engineers delivered it in four months.”
Victor Tang, CPO, Corros
“One of the most technically gifted leaders and engineering teams I've ever worked with. Swift executors and generally very likable people.”
Sonny Mo · Co-Founder & CEO, Bloom (YC W21)
“They absolutely nailed it: on time, without busting the budget. They kept things smooth throughout.”
Josh Archer · CTO, Arketa (YC S20)
“We worked with another agency and faced surprising costs because of unthought estimations. Working with HorizonLabs enabled us to work without surprises.”
Victor Tang · Chief Product Officer, Corros
Portals, dashboards, and automations that replace spreadsheets and brittle tools with calm, maintainable software. Choose fixed scope or estimated hours: under 250 development hours/month is $120/hr; over 250 is $100/hr. Estimates and clarification meetings are always free.
Quoted before work begins
Portals, dashboards, and workflow automation
Milestones and acceptance criteria agreed in writing
ERP/CRM integrations and staff training
Free estimate and clarification meetings
6-month warranty on delivered code
$120 /hour
For evolving workflows or staged delivery
Written hour range with a hard ceiling
Pay only for approved development hours
Direct engineer access
Billed every two weeks
$100 /hour
Volume rate above 250 development hours/month
Parallel product and engineering workstreams
Written hour range with a hard ceiling
Billed every two weeks
6-month warranty on delivered code
“The product with which Horizon is helping us is an industrial manufacturing device... We had previous sets of contractors who each made an attempt to get real-time-like performance from the Android front end. They were abysmal failures. Horizon's Gorkem Bendin understands the tradeoffs required for real-time embedded processing and is able to write Android code that partitions the expensive computations outside the fast loops and allows our code to offer timely information to the users of our product. Highly recommended.”
Andrew Ward · MK Products · ISO-certified welding-products manufacturer
The same team, sprint after sprint, since 2019: hardware and the software that runs it, one warranty.
Official Sharetribe Experts since 2023; our founders have been building together since 2011. Choose a fixed-scope marketplace package or estimated development hours: under 250 hours/month is $120/hr; over 250 is $100/hr. Estimates and clarification meetings are always free.
One seller, many buyers: rentals, bookings, curated catalogs, passes. Your stack, your data, no platform fees shaping the model.
Fixed-price custom build: $5,000–30,000
Or estimated hours: $120/hr under 250 · $100/hr over 250
Free written estimate · milestone payments
RareWaters: migrated in <3 months, then acquired
Providers and customers both onboard themselves: services, peer rentals, product resale. Sharetribe handles transactions, payouts, and reviews; custom code extends only what your model needs.
Fixed Sharetribe launch: $5,000–15,000 no-code
Fixed custom Sharetribe build: $5,000–30,000
Estimated extensions: $120/hr under 250 · $100/hr over 250
Free written estimate before you commit
Official Sharetribe Expert Partner
Free codebase and console review first. Approved rescue work is $120/hr under 250 hours/month or $100/hr over 250, billed every two weeks. Estimates and clarification meetings are free; you pay only approved development hours.
WordPress → Sharetribe in under 3 months. Season passes, gift cards, variable pricing. Acquired.
YC-founded resale marketplace. Listings, discovery, transactions, admin tools: two years and counting.
Two-sided boat rental marketplace on Sharetribe. Custom reservation flows, a dynamic pricing calculator for captain, fuel, and add-ons, subscription tiers, and a webhook/API layer that cut manual admin work.
University freelance marketplace launched in two weeks ahead of demo day. Multiple listing and transaction models on Sharetribe, admin-operable from day one.
Internship placement marketplace MVP. Listing, matching, and placement workflows that supported real placements and cut coordination load on the founding team.
Resale marketplace engineering bench through high-growth phases. Improved reliability across high-traffic flows; several Horizon engineers joined full-time after acquisition.
Curated adventure marketplace on Sharetribe. Host certification, tiered visibility, and flexible pricing that kept quality control inside the product instead of the inbox.
SLP training marketplace on Sharetribe. Credential verification, package booking, rewards, and commission controls that turned manual approvals into product features.
Fractional CTO leadership and MVP delivery for an industrial parts marketplace: manufacturer storefronts and authorized-buyer transactions, built as a fundraising-ready proof of concept.
Full-stack, AI, and embedded engineers in your repo, on your cadence, on US hours. Small well-tested changes, honest trade-offs, and direct Slack access to the people writing your code: no account-manager relay.
Scoped by sprint against an hour range with a hard ceiling
10+ years average experience
You own every line in your GitHub org
Code only touches AI in secure environments
$100–120 /hour
Senior front-end, back-end, and full-stack delivery
Direct Slack and US-hours overlap
Billed every 2 weeks
$150–200 /hour
AI research and production ML/LLM systems
Embedded/IoT and real-time engineering
Cloud performance and cost-efficiency engineering
Billed every 2 weeks: pay only for developer man-hours
Written sprint range with a hard ceiling
Estimates and clarification meetings are free
Direct access to the engineers doing the work
Choose on-demand capacity or a larger team. Every sprint has a written hour range and a hard ceiling.
The engineers who shipped Cuboh (YC S19) never left: zero team handoffs since 2019.
“Horizon Labs has strong skills and experience with OpenAI, LLMs, API development, Kubernetes, and cloud deployment. Their engineering support helped us deliver a production-ready application we could roll out to customers fast.”
Samir Sen · Co-Founder & CEO, FlairLabs (YC S22)
“Horizon Labs vastly increased our visibility into technical workflows and capacity to achieve projected outcomes. They have a fast and reliable team with exceptional integrity.”
Marcus Ellison · CEO, TrueChoice
Since 2019, across SaaS, healthtech, manufacturing, marketplaces and AI.
The same senior engineers from first sprint to launch
Kickoff usually the day after you sign
A written hour range with a hard ceiling, every sprint
Hour range with a hard ceiling in every contract; the maximum is the most you'll ever pay for agreed scope. Overage is on us.
California leadership, engineers overlapping 6am–6pm Pacific, direct Slack access to the people writing your code.
Your GitHub org from day one, IP assigned under a US contract. No proprietary frameworks, no lock-in.
Horizon Labs is a done-for-you GTM engineering team. We build the connective tissue between your CRM, your content, your automation and your reporting, and we put a name on every deliverable.
Every one of those is an engineering problem wearing a marketing costume.
A team, not a solo consultant.
Not a pooled queue and not an offshore relay. You meet the person before kickoff.
What is in, what is out, and what a revision costs: in writing, before the first hour is billed.
So the second engagement is priced on measurements rather than estimates.
Multi-engine orchestration, a Slack bot with runners, scheduled pipelines, live client sites. The portfolio is the operation, not a deck.
Six things, priced before you ask. Scoped in writing. Delivered in weeks, not quarters.
$3,500/mo
Four long-form pieces a month (1,500–2,500 words), each with a named human author, a practitioner interview or primary source, original charts where the data supports one, internal linking and an editorial calendar. Every claim carries a source link.
Written by a person, sourced, and we’ll show you the interview notes.
Not included: SEO guarantees. One revision round per piece; you supply 30 minutes of SME time per piece.
$1,500 each · bundle of 5 for $6,000
One automation live in your stack, with error handling, a failure alert to a channel you actually watch, a one-page runbook, and a 14-day fix window. Built in n8n, Make, Zapier or native. Your choice.
Not included: more than one trigger, one workflow, or three connected systems; integrations without a documented API. The 14-day window covers defects in what we built, not changes to your systems and not third-party API changes.
$4,500 · 2 weeks
A measured baseline of how often you are mentioned and cited in AI answers versus three named competitors; entity and schema markup; llms.txt; ten priority pages restructured into answer-shaped form; a citation-source placement plan; and a 30-day re-measurement against the baseline.
You cannot see this about yourself. We can measure it.
Not included: ranking or citation-rate guarantees. AI answer surfaces change weekly, and a promised number there is a refund waiting. One brand, one language, ten pages, three competitors. Ongoing: $1,500/mo monitoring, a new number every month, not a retainer that reports the same chart.
$4,500 · 2 weeks
Your CRM turned back into something the team trusts: deduped, lifecycle stages that mean something, routing that fires, and the reporting that depends on it.
$3,500 · 1.5 weeks
One source of truth for where revenue came from: events, UTMs, channel definitions, and a dashboard your team will actually open. Pairs naturally with AI Search Visibility: same buyer, same week.
$4,000 · 2 weeks
One conversion-focused page, designed and built live in Webflow or your stack; responsive to 320px; form or booking integration; analytics and conversion events wired; on-page SEO; a 2-week post-launch bug window.
Not included: CMS, multi-page IA, migrations. One design revision and one build revision. Copy is yours, or add it for $1,500.
Need a logo, a deck or a Figma prototype? We do those too. They just are not on this list, because they belong inside a build, not on a price sheet.
For companies that need more than one thing.
Free
$3,000, credited toward month one
$6,000/mo
$12,000/mo
$18,000/mo
One senior engineer embedded in your stack, your Slack and your standups, three days a week. They ship weekly against your priorities instead of a statement of work. Three-month minimum, capped at 100 hours a month.
You bought the AI tooling. You do not have anyone who can wire it into the business. That is the person.
Foundation and Growth Engine are rolling monthly: 30 days' notice, and a 14-day out in month one. The audit fee is credited toward the first month.
Results from GTM programs led by Saif Akhtar, our COO.
3.5× organic traffic over 16 months, 2,000+ page programmatic SEO program. Company raised a $4M Series A.
3× inbound leads over 12 months. Company raised an $8M Series A.
$0 → $40M AUM, employee #1, Facebook’s first ads-API partner, acquired.
$7M portfolio grown past $50M.
We do not resell software. When a build needs a platform, you license it directly and we set it up, so you own the account, the data and the price.
AI-native SEO and GEO platform. We recommend it when the goal is being cited in AI answers, not just ranked in search.
SEO and AEO platform aimed at B2B SaaS. We recommend it when technical on-page and content operations need one system.
What we wire together, in accounts you own
Kickoff is usually the day after you sign, for fixed-price builds and retainers alike.
A named person per deliverable, introduced before kickoff. Not a pooled queue and not an offshore relay.
The price is the price. That is what fixed-price means, and it is why the scope wall on each card is specific.
No, and be suspicious of anyone who does. We guarantee the instrumentation, the fixes and an honest monthly read of the movement.
No. You license platforms directly; we set them up.
Yes. Agency subcontracting is normal for us.
One automation, one page, one measured baseline. If it works, the next one is easier to say yes to.
Embedded controllers, operator panels, and the companion software that has to keep up with both. Published rates, a written scope, and a hard hour ceiling before you commit.
Scoped by sprint against an hour range with a hard ceiling
10+ years average experience
You own every line in your GitHub org
Embedded, Android, and device-interface scope
$150 /hour
Senior embedded, firmware, and device-interface delivery
Direct Slack and US-hours overlap
Billed every two weeks
$150 /hour
Android and touch-panel operator front-ends
Embedded/IoT and real-time engineering
Real-time control loops, USB, kiosk, and device debugging
Billed every 2 weeks: pay only for developer man-hours
Written sprint range with a hard ceiling
Estimates and clarification meetings are free
Direct access to the engineers doing the work
Choose on-demand capacity or a larger team. Every sprint has a written hour range and a hard ceiling.
MK Products had 20 in-house engineers and two years on a stalled embedded build. A 2-engineer Horizon Labs team got it launch-ready in months.
“We had previous sets of contractors who each made an attempt to get real-time-like performance from the Android front end. They were abysmal failures. Horizon's Gorkem Bendin understands the tradeoffs required for real-time embedded processing and is able to write Android code that partitions the expensive computations outside the fast loops. Highly recommended.”
Andrew Ward · Engineering Manager, MK Products
“Horizon Labs vastly increased our visibility into technical workflows and capacity to achieve projected outcomes. They have a fast and reliable team with exceptional integrity.”
Marcus Ellison · CEO, TrueChoice
Since 2019, across SaaS, healthtech, manufacturing, marketplaces and AI.
Start with a 3-month trial against a hard hour ceiling
Engineers who know what must never run inside the fast loop
Firmware and app code in your repo, IP assigned under a US contract
Usually more than once. MK Products went through several. Start with a 3-month trial against a hard hour ceiling. If the cadence isn't there, you've lost a quarter, not a roadmap.
That is the actual failure mode, and it is why panel work is hard. The skill is knowing what must never run inside the fast loop. Ask us to walk through the partitioning on a call before you sign.
Your GitHub org from the first commit, IP assigned under a US contract. No proprietary frameworks, no lock-in, no seat you can't cancel.
Cost data, credentials, and eligibility rules that were never designed to be read by a patient. We build the software layer that makes them legible, and we work inside a BAA when your build touches ePHI.
Scoped by sprint against an hour range with a hard ceiling
10+ years average experience
You own every line in your GitHub org
BAA in place when your build touches ePHI
$100–120 /hour
Eligibility input, search, and results that survive real payer data
Direct Slack and US-hours overlap
Billed every two weeks
$100–120 /hour
Verification and approval workflows with admin tooling
Role-based accounts and enforceable policy controls
NPI and machine-readable pricing ingestion, plus EHR integration experience from Tasso Health and Oscar Health
Billed every 2 weeks: pay only for developer man-hours
Written sprint range with a hard ceiling
Estimates and clarification meetings are free
Direct access to the engineers doing the work
Choose on-demand capacity or a larger team. Every sprint has a written hour range and a hard ceiling.
Our co-founder built Türkiye's national healthcare portal, then shipped diagnostics and insurance infrastructure at Tasso Health and Oscar Health before starting Horizon Labs. For Yura Health we built the cost-transparency engine end to end: the federal NPI registry and machine-readable payer pricing in, a real out-of-pocket number out.
“Horizon Labs is a high quality, responsive team with fast turnaround on sprints.”
Dan Lee · Co-Founder & CEO, Yura Health
“Horizon Labs vastly increased our visibility into technical workflows and capacity to achieve projected outcomes. They have a fast and reliable team with exceptional integrity.”
Marcus Ellison · CEO, TrueChoice
Since 2019, with healthcare engineering going back further: national health systems, diagnostics and payer infrastructure.
We work under a BAA when your build touches ePHI
Clinical and security review cycles scoped into the hour range
Your GitHub org from the first commit
We work under a BAA when your build touches ePHI, and we scope the evidence a customer security review actually asks for: ePHI mapped from collection through deletion, vendor boundaries resolved before integration, least privilege across users, staff and services, and audit controls that support an investigation.
It will if it arrives at the end. We scope review cycles into the hour range up front, and the ceiling holds whether or not the reviews run long.
Your GitHub org from the first commit, IP assigned under a US contract, and a documented handoff whenever you want it.
Embedded, companion app, and device-to-cloud engineering for connected medical devices. We support your engineering evidence and delivery. We do not replace your quality system, and we will tell you so on the first call.
Scoped by sprint against an hour range with a hard ceiling
10+ years average experience
You own every line in your GitHub org
You retain regulatory ownership, always
$150 /hour
Trust boundaries across firmware, transport, client, and cloud
Direct Slack and US-hours overlap
Billed every two weeks
$150 /hour
Firmware, device interfaces, and the app that talks to them
Secure OTA update designed as a safety-critical capability
SBOM and fleet-security telemetry for fielded devices
Billed every 2 weeks: pay only for developer man-hours
Written sprint range with a hard ceiling
Estimates and clarification meetings are free
Direct access to the engineers doing the work
Choose on-demand capacity or a larger team. Every sprint has a written hour range and a hard ceiling.
Our device experience is industrial. MK Products is an ISO-certified manufacturer and our scope there spans Android, embedded, USB, kiosk and device debugging. That is not medical-device work, a safety outcome, or evidence of regulatory compliance, and we will not present it as any of those.
“Horizon's Gorkem Bendin understands the tradeoffs required for real-time embedded processing and is able to write Android code that partitions the expensive computations outside the fast loops and allows our code to offer timely information to the users of our product. Highly recommended.”
Andrew Ward · Engineering Manager, MK Products
“Horizon Labs vastly increased our visibility into technical workflows and capacity to achieve projected outcomes. They have a fast and reliable team with exceptional integrity.”
Marcus Ellison · CEO, TrueChoice
Since 2019. Healthcare systems experience from a national health portal, Tasso Health and Oscar Health: software and infrastructure, not regulated devices.
Deliverables written to slot into your design history file
Bounded, documented scope; code lands in your repo
Working knowledge of IEC 62304, ISO 13485 and ISO 14971
Correct, and we lead with it. What we bring is senior embedded and connected-systems engineering, plus a published working knowledge of the standards your file has to satisfy. You keep the submission.
Scope is bounded and documented, code lands in your repo, and the deliverable is written to slot into your existing design history file rather than sit beside it.
You aren't paying for one. Read our compliance glossary covering IEC 62304, ISO 13485, ISO 14971, the FDA QMSR and Section 524B before the call, and judge for yourself.
Saif Akhtar is the co-founder and COO of Horizon Labs. He is a startup operator, GTM systems builder, and former early-stage investor with experience across performance marketing, SaaS, marketplaces, e-commerce, healthtech, AI, and agency operations.
His background includes early growth and operator roles at companies and projects like Pinfluence, OrionCKB, Smashon, Delta Leaf, PolymerSearch, Nostra AI, Cresance, Intellus, Horizon Labs, and SimplyHRA, along with venture/startup ecosystem work through 10xC and Planet N Group. At Horizon Labs, Saif helps founders and business leaders turn rough ideas, customer problems, and messy workflows into clear scopes, practical timelines, and delivery plans before they commit to a build.
Sinan Sari is the co-founder and CEO of Horizon Labs. He is a YC alum, software engineer, and former co-founder/CTO of Cuboh, with experience across healthcare infrastructure, marketplaces, SaaS, payments, and AI.
His background includes Türkiye’s national healthcare systems, Tasso Health, Oscar Health, Yura Health, Kidsy, and Avocore. At Horizon Labs, Sinan helps founders and engineering leaders pressure-test product scope, technical risk, timelines, and the right delivery model before they commit to a build.
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Lessons from 60+ projects across MVPs, marketplaces, AI, and embedded systems. Practical insights on shipping software that users actually want.
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Practical guides, tools, and insights from 60+ products shipped across MVPs, marketplaces, AI, and embedded systems.
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