Yuliia U.

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We use AI daily to build faster, but thinking, judgment, and ownership and communication itself should stay human.
Share your project idea or the bottleneck you’re stuck on - I’ll personally help you find the next step.

Proof: 80+ products, 9+ years in Software Development and Full Stack Development, and 20,500+ Upwork hours as a React Developer, Full Stack Developer, Software Developer, and Web Developer. Hands-on: TypeScript, JavaScript, Node js, AI Development.

$3M+ client impact and $400K+ direct Upwork revenue.
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 35+ in-house engineers, joining as a Senior React Developer or adding QA, PM, and CTO support.

As a react developer and front end developer react specialist - 28+ systems across dashboards, responsive UI, SaaS Platforms, booking products, marketplaces, and e-commerce, with Web Design, UX/UI audits, UX & UI polish, and UI/UX Prototyping.

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

As a full stack developer react node, full stack web developer, and full stack developer ai - 42+ end-to-end software development builds. Full-Stack Development means one owner for Back-End Development, API Development, User Authentication with OAuth, Database Architecture, payments, subscriptions, Third-Party Integration, and scalable SaaS Development. Full Stack Development Skills turn into Full Stack Development Deliverables, not handoffs.

As a fullstack developer and web app developer react specialist - 30 Web Application Development projects: admin dashboards, portals, website optimization, and SaaS Marketing integrations. Every Web Application starts with Web Development Consultation; Web Development also covers WordPress, Lovable, Vue.js, Angular, jQuery, and Bootstrap.

As a react native developer with expo experience - 28+ mobile apps for iOS and Android using Expo, EAS Build, Firebase, Supabase, push notifications, RevenueCat, WebRTC, Socket io, and real-time features.

Mobile App Development spans iOS Development, Android App Development, Kotlin, Flutter, AI Mobile App Development, and Apache Cordova migrations for any Smartphone. Also: react native expo, react native mobile, react native firebase.