Yevhen S.

Available ASAP ⚡ 🛰️ Built a platform for NASA Geochron 🎥 Shipped video streaming apps handling 100,000+ concurrent users 💰 Helped clients generate $1.5M+ in revenue through web and mobile products 📱 Delivered 100+ projects across web, React Native Mobile, and Node.js backends - startups, SaaS, fintech, healthcare, and B2B I'm a Senior React Developer and Full Stack Developer React Node with 9+ years of experience on the frontend and hands-on backend experience building production-ready web, mobile, and server-side applications. As a Full Stack Developer React Node, I work across the entire stack - from MVP prototypes shipped in days to complex SaaS platforms built to scale. Whether you need a React Developer for web application, a React Native Developer for your app, a Node.js backend, or all three - I build things that work, perform, and hold up in production. 🔧 Tech I work with daily: React.js | Next.js | TypeScript | React Native | Node.js | Express.js | PostgreSQL | MongoDB | Redux | Zustand | Tailwind CSS | shadcn/ui | REST API | GraphQL | OpenAI API | WebSocket | Figma 🌟 What I actually do well 🔹 React & Next.js Web Applications From SaaS dashboards and admin panels to marketplaces, fintech platforms, and B2B tools - I build clean, scalable frontend React frontends that real users rely on daily. As a React Developer, I get into existing codebases, not just greenfield projects. 🔹 Node.js Backend & API Development As Full Stack Developer React Node, I have hands-on experience building REST APIs, GraphQL endpoints, authentication systems, background jobs, and database architecture using Node.js and Express. Backends designed to support the same scale and reliability standards as the frontends I ship. 🔹 React Native Mobile Apps Cross-platform iOS and Android development using React Native. As a React Native Developer, I've shipped mobile apps to the App Store and Google Play, and I know the difference between demo-ready and production-ready. 🔹 MVP & Prototype Delivery Startup mode is where I'm comfortable as well. As Full Stack Developer React Node I translate concepts into working React Next.js, Node.js, or React Native Mobile prototypes fast, without sacrificing the architecture decisions that matter later. 🔹 Real-Time & Complex UI WebSocket integrations, live dashboards, streaming interfaces, real-time data flows - built and shipped across multiple platforms including a video streaming product at 100K+ concurrent users. As Full Stack Developer React Node, I take on each project with this same level of care. 🔹 AI-Powered Apps OpenAI API integrations into web, mobile, and Node.js backend products - chat interfaces, AI assistants, content generation tools - built as production features, not demos. My work as a Full Stack Developer React Node means these are shipped as real, scalable, end-to-end features. 🔹 Figma to Production Pixel-accurate implementation of Figma designs across React Next.js and React Native Mobile projects. As React Developer and React Native Developer I've worked directly with design teams and solo designers - I know how to read a design file and ask the right questions. 🔹 Performance & Code Quality Core Web Vitals, bundle optimization, API performance, database query tuning, clean component and service architecture - I write Next.js TypeScript and Node.js code that the next developer can read and extend. Clean handoff is non-negotiable. 🏆 Delivered across 9+ years 🔸 NASA Geochron platform - complex data-driven web application 🔸 Video streaming platform - 100,000+ concurrent users 🔸 20+ SaaS products launched across multiple verticals 🔸 8 HR platforms shipped end to end 🔸 100+ web, mobile, and backend projects for clients in the US, Canada, Europe, and Asia 🔸 $1.5M+ in client revenue generated through full stack React Node web applications 🔸 5-star reviews consistently across projects 💡 I can help you with - Frontend Developer React / Next.js / TypeScript web application development - Node.js / Express backend and API development - React Native Mobile iOS and Android app development - SaaS platform work, full stack React Node - MVP to enterprise scale - Admin dashboards and internal tools - Real-time features, WebSocket, live data, streaming UI - OpenAI / AI feature integration, frontend and backend - Figma to production implementation - Performance optimization, Core Web Vitals, and API efficiency - Existing codebase improvement and modernization - Fintech, healthcare, B2B, marketplace, and consumer app development 🚀 Let's build something If you need a Senior Full Stack Developer React Node, a React Developer, or a React Native Developer - someone who has shipped 100+ projects globally, worked on NASA-grade infrastructure, and helped clients generate over $1.5M in revenue - let's talk. Available ASAP.