Fintech product interface
Shipped an advisory UI that earned 90%+ positive user feedback.
Designed and delivered a product surface for a fintech team that needed a clearer workflow and stronger day-to-day usability.
Andrii Furmanets
Senior full-stack help for teams that need product work shipped well.
React, Next.js, TypeScript, and Rails for launches, rebuilds, and delivery support when you need senior execution without extra noise.
Freelance full-stack partnerEurope + US timezone overlapReply within 1 business day
Selected work
Enough proof to make the next step obvious.
I keep the homepage short, so this is the part that shows how I tend to work: product-minded, cross-stack, and focused on outcomes that matter to teams shipping real software.
Performance and accuracy
Improved trading-platform responsiveness on real-time product work.
Worked across frontend and backend concerns to reduce friction, improve speed, and support reliability where timing mattered.
Cross-stack delivery
Stepped across React and Rails to unblock shipping when teams needed senior help.
Joined product work where execution mattered more than ceremony, moving from interface details to application logic without handoff delays.
If you already know the project is moving, we can talk through scope and next steps on a short call.
Best for new builds, rebuilds, and delivery support.
How I help
Senior execution where product work usually slows down.
Most clients do not need a giant agency process. They need clear decisions, reliable implementation, and someone who can move from interface detail to backend logic without losing momentum.
Build product surfaces
Shipping new user-facing product work with React, Next.js, TypeScript, and clean frontend architecture.
App flowsDesign-system implementationProduction-ready frontend
Modernize existing apps
Improving codebases that already exist, whether the issue is clarity, maintainability, or delivery speed.
RefactorsUI cleanupPerformance and stability
Support delivery across the stack
Stepping into backend and product logic when the fastest path is a senior engineer who can cover both sides.
Rails APIsProduct integrationHands-on delivery support
Next step
If you need a senior engineer who can move from UI to backend without extra overhead, let's talk.
The intro call is a simple 30-minute conversation about scope, priorities, timeline, and whether I am the right fit for the work.