Yuliia U.

👋 Hi, tired of chatting with AI? Let’s have a real conversation.

AI can write posts, cover letters, and prototypes. I focus on turning those prototypes into products that ship, scale, and actually work.

50+ products, 9+ years in development, and 20,500+ Upwork hours as a React Developer, Full Stack Developer, Software Developer, and Web Developer.

$3M+ client impact and $300K+ direct Upwork revenue generated through React, Next.js, Node.js, TypeScript, Supabase, SaaS, AI, marketplace, and e-commerce development.

5M+ users across high-load web and mobile products. 40+ MVPs launched, many in 5–8 weeks. 75% repeat clients. 3.8M+ experts supported through a React Native product. 75+ Supabase Edge Functions delivered in a multi-tenant AI SaaS.

At Koitechs, I work with a 35+ in-house engineering team, so I can join as a Senior React Developer or bring React, Node.js, React Native, QA, PM, and CTO support when the product needs more capacity.

As a front end developer react specialist - 28+ systems across dashboards, responsive UI, SaaS Platforms, booking products, marketplaces, and e-commerce.

As a react next js developer - 42+ launches using Next.js React, React Typescript, Supabase, PostgreSQL, Vercel, REST API, GraphQL, and production component architecture.

As a full stack developer react node - 42+ end-to-end builds covering frontend, backend API development, authentication, data architecture, payments, subscriptions, integrations, and scalable SaaS systems.

As a fullstack developer and web app developer react specialist - 30 web applications, admin dashboards, portals, website optimization, and SaaS Marketing integrations.

As a react native developer - 18+ mobile apps and complex mobile products using Expo, EAS Build, Firebase, Supabase, push notifications, RevenueCat, WebRTC, and real-time features. This includes react native developer with expo experience, react native developer expo, react native app developer, react native firebase, and full stack mobile development.

As a Backend Developer Nodejs - 7 years as Node.js, NestJS, PostgreSQL, Supabase Backend, MongoDB, Redis, GraphQL, RESTful API, Stripe, Twilio, webhooks, and background jobs.

As an AI Developer - OpenAI, Claude API, RAG, AI Agents, AI Chatbots, structured outputs, transcription, and AI API Integration an 45% revenue. I work as a full stack ai saas developer, ai saas developer, open ai developer, and agentic ai developer on production AI features.