Artem L.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Apr 12, 2026.

I'm Artem, CTO and co-founder koitechs But the most important — tech lead MERN stack full stack react node developer with more than 12 years of experience in this stack. I can help provide in-house React Next js developer and full stack react node , mearn stack developer, React developer (React.js, Next.js, Node.js) who join your team seamlessly. Our team react developer experience covers SaaS, Gaming, Logistics, FinTech, E-commerce, Healthcare, PropTech, EdTech, MarTech, and Marketplaces. We help clients launch MVPs 3× faster and scale platforms to millions of users with our React developer . Our React developer full stack react node , mearn stack developer, React developer s are not freelancers — every web developer is an in-house, CTO-approved specialist. Depending on your project needs, we can provide senior react native and full stack developer in React.js, Next.js, Node.js, as well as frontend frameworks like Vue and Angular. For content-driven platforms, we also deliver high-quality WordPress development integrated into your main product stack. 🛠 Skills & Tech React developer React web development full stack react node , mearn stack developer, React developer / React.js, Next.js, Node.js, TypeScript, JavaScript (ES6+), Redux / Redux Toolkit, Tailwind CSS, CSS3, HTML5, API Integrations, REST API, GraphQL, Supabase, Prisma, PostgreSQL, MongoDB, Firebase, Vercel, AWS, Docker, SaaS Development, Agile, Git, WebSockets, Storybook, Testing (Jest, Cypress). 📌 Processes Agile / Scrum with daily standups CI/CD pipelines and Git Flow Pixel-perfect Figma → React / Next.js conversion Code reviews, automated tests, and scalable architecture Modular feature rollout with API-first design ⚡ What our React developer Build Interactive dashboards (analytics, logistics, BI SaaS) Real-time data apps (WebSockets, maps, chat, streaming) E-commerce flows (Stripe, Twilio, checkout, subscriptions) Authentication & multi-role authorization Custom admin panels, CMS, CRMs Pixel-perfect UI with Tailwind / Material UI Performance optimization (Core Web Vitals, Lighthouse) 📊 Our Results 99.5% delivery accuracy across 4 continents 5M+ daily users handled with 60% faster load times $100M+ monthly transactions processed with 99.99% uptime 500K+ monthly active users across gaming platforms 40% cost reduction in delivery operations 22% conversion rate increase for e-commerce clients 85% automation of operational processes 35% efficiency boost in business analytics 📈 Why Koitechs In-house only React developer s: no freelancers, no ghosting 75% repeat clients, 100% Upwork Job Success From 1 react native developer to a full stack team with QA & PM 48-hour matching + 2-week trial period Transparent communication, daily syncs, and predictable delivery Whether you need a single python developer, full stack react node , mearn stack developer, React developer a React.js or React developer to boost performance, a react native mobile app developer for cross-platform solutions, a Node.js backend specialist, or a cross-stack team mixing Vue, Angular, and WordPress — koitechs can match you with the right talent within 48 hours. Ready to meet a brilliant service and top-notch React developer full stack react node , mearn stack developer, React developer or next developer and forget about hiring drama? Click "Invite" and meet your front-end expert today! I'll be your top notch account manager and help from A to Z of our cooperation