I AM
Segev Sinay, a Fractional Frontend
I design your frontend architecture, set the standards, and build alongside your team — senior leadership without the full-time cost.
For startups scaling from Seed to Series B
Self-diagnosis
Why Would You Need a Fractional Frontend Architect?
Most founders don't realize they have an architecture problem until it's already costing them. Check any that sound familiar.
Features Take Forever to Ship
Devs fight the codebase
Your team spends more time working around the existing code than building new things. A feature that should take two days takes two weeks. Every change touches everything — and breaks something else.
Found in 8 out of 10 teams I've audited
Nobody Owns the Frontend
Architecture by accident
Backend has clear ownership and structure. Frontend? Whoever pushes last decides the patterns. No consistency, no direction, no one accountable for the big picture.
The #1 reason frontend debt accumulates silently
Tech Debt You Can Feel
It slows everything down
You know the codebase needs work. But every sprint is about shipping features, not fixing foundations — so the debt compounds. Your best developers are frustrated. Some are already looking elsewhere.
Teams lose ~30% velocity to accumulated frontend debt
New Devs Take Weeks to Ramp
No patterns to follow
There's no design system, no conventions, no documentation. Every new hire reinvents the wheel — or worse, adds a fourth way to do the same thing. Time-to-first-meaningful-PR: three weeks.
Should be days, not weeks — with the right architecture
You Hired Senior, Got Junior Output
Titles don't mean architecture
Writing React components isn't the same as owning frontend architecture. You need someone who thinks in systems, not just code — someone who sees the product, the team, and the business behind every technical decision.
Architecture is a different skill than feature development
The Prototype Became the Product
And now it's breaking
What you built to validate the idea is now serving real users at real scale. It wasn't designed for this — and it shows. Performance issues, scaling problems, and a growing list of things that "shouldn't happen."
The most expensive problem to fix later — cheapest to fix now
Check any that sound familiar.
Years Of
Experience
Frontend Architecture
20+ Projects Delivered
Where I Come In
I've Solved This Before
9 years of building products from empty repo to production. I've done this dozens of times — whether you're starting fresh or drowning in tech debt.
I work alongside your designers, PMs, and leadership to make sure every technical decision drives business outcomes — not just engineering.
Services
Ways to Work Together
Whether you need a full build, a migration, ongoing leadership, or a fast MVP — here's how I plug in.
Build Your Product From Scratch
You have an idea and need someone to build it right from Day 1. I design and implement your entire frontend — so your first codebase is the one that scales.
Deliverables
- Production-ready architecture & design system
- CI/CD pipeline & developer tooling
- SEO & performance foundations
- Documentation your team can build on
Your Codebase Is Slowing You Down
Features take weeks instead of days. New hires take forever to ramp. I modernize your frontend without stopping feature development — so your team ships fast again.
Deliverables
- Migration roadmap & risk assessment
- Incremental migration, zero downtime
- Security & accessibility audit
- Post-migration documentation
Senior Frontend Leadership On Demand
You need a senior technical leader but not full-time. I plug into your team on retainer — architecture decisions, code reviews, hands-on building, and technical direction.
Deliverables
- Weekly architecture reviews
- PR reviews & coding standards
- Hands-on feature development
- Frontend architecture roadmap
From Idea to Production-Ready MVP
Turn your idea into a working product. Full-stack implementation with architecture that grows with your business — not a prototype you'll need to rewrite in 6 months.
Deliverables
- Production-ready codebase
- Authentication & authorization
- API design & integrations
- Deployment & monitoring setup
Track record
Real Products, Real Results
From eCommerce platforms to industrial IoT to enterprise communications — every project here shipped to production.
Client feedback
Here's What My Clients Say
Names withheld under NDA. The problems and outcomes are real.
“Honestly, we almost didn't bring him in. We'd been burned by external help so many times that we'd given up and decided to just grow the team internally. But our timeline forced our hand — we had no choice but to bring someone in from outside to hit our deadlines. And honestly? It completely changed how I think about external help. Segev was fully remote, but more present than people sitting in our office. He shaped our architecture and pushed back on decisions we were sure about. We didn't always understand why he insisted, but then it clicked — he just genuinely cares about our success. As he put it: 'your success is my reputation, so you have to succeed.'”
— Head of Product, Series B Fintech
FAQ
Frequently Asked Questions
Common questions about fractional frontend architecture and how I work with startups.
Get started
Ready to Level Up Your Product?
I take on a handful of companies at a time. Reach out to discuss your challenges and see if there's a fit.