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🏆 Top 3% of Upwork talent - ⭐⭐⭐⭐⭐ across every project, 100% satisfied clients ⚡ 6+ years building production SaaS - Vue 3 / Nuxt 3 and React / Next.js 🤝 I treat your codebase like my own and prefer long-term partnerships over one-off gigs I ramp up fast, communicate clearly, and deliver clean, maintainable code your future self will thank you for. If you need someone reliable who takes ownership - let's talk. ✓ Vue 3 / Nuxt 3 / React / Next.js ✓ Mobile - iOS & Android via Capacitor ✓ CMS - Prismic / Storyblok ✓ Backend - NestJS / PostgreSQL / MongoDB What you get: - Faster development (1 codebase) - Lower cost than hiring 3 developers - Clean, scalable backend (NestJS) - Production-ready apps (App Store / Google Play) Best fit: - SaaS platforms - Marketplaces - Dashboards / admin panels - MVPs for startups My services: - Web page and interface development (HTML, CSS, JavaScript, Vue, Nuxt, Typescript) - Responsive design (creating designs for various devices use Vue Nuxt) - Interactive elements and animations (using JavaScript or libraries like React, Vue, Nuxt) - Performance optimization Vue Nuxt projects (reducing page load times, caching, image optimization) - Working with APIs on the Vue Nuxt projects (using RESTful or GraphQL APIs for data fetching and submission) - Vue Nuxt Interface testing (unit and integration testing using tools like Jest, Mocha, Cypress) - Developing Progressive Web Apps use Vue Nuxt (PWA) - Backend service integration for the Vue Nuxt (ensuring communication between frontend and server) - Layout and component creation from Figma design mockups (turning Figma designs into HTML, CSS, Vue, Nuxt, Tailwind code) - CMS website development (WordPress, Drupal, StoryBlok, etc.) - Accessibility (a11y) optimization for users with disabilities on the Vue Nuxt projects - Frontend database interaction on the Vue Nuxt (e.g., with Firebase) - Payment system integration for the Vue Nuxt (PayPal, Stripe, etc.) - SEO optimization Vue Nuxt projects (optimizing meta tags, creating a search-engine-friendly site structure) - Maintenance and updates of existing Vue Nuxt web apps (bug fixing, dependency updates) - Type-checking and type-safe code (using TypeScript or Flow for ensuring robust and error-free code in the Vue Nuxt projects) - Migrating projects from older versions of Vue/Nuxt to newer versions (updating dependencies, refactoring code to comply with new features and breaking changes) If you want to cooperate with me click the button 'INVITE' in my profile. Best regards, Roman Zarvanskyi. Keywords: Frontend development Vue Nuxt React Next, Frontend development, Vue Nuxt React Next, Vue/Nuxt, React/Next, Vue.js, Nuxt.js, React.js, Next.js, Vue 3, Nuxt 3, Frontend development Vue Nuxt React Nex JavaScript, Frontend development Vue Nuxt HTML, Frontend development Vue Nuxt CSS, Frontend development Nuxt Vue.js, Frontend development Vue Nuxt.js, Frontend development Vue Nuxt Vuex, Frontend development Nuxt Vue Router, Frontend development Vue Nuxt SSR, Frontend development Vue Nuxt Static site generation, Frontend development Vue Nuxt SPA, Frontend development Vue Nuxt Nuxt modules, Frontend development Vue Nuxt Server-side rendering, Frontend development Vue Nuxt Lazy loading, Frontend development Vue Nuxt 3, Frontend development Vue Nuxt PWA, Frontend development Vue Nuxt Webpack, Frontend development Vue Nuxt Babel, Frontend development Vue Nuxt Axios, Frontend development Vue Nuxt Vuetify, Frontend development Vue Nuxt Tailwind CSS, Frontend development Vue Nuxt SCSS, Frontend development Nuxt Bootstrap Vue, Frontend development Vue Nuxt Responsive design, Frontend development Vue Nuxt API integration, Frontend development Vue Nuxt JWT authentication, Frontend development Vue Nuxt Firebase, Frontend development Vue Nuxt Jest, Frontend development Vue Nuxt Pinia, Frontend development Vue Nuxt Testing, Frontend development Vue Nuxt CI/CD pipelines, Frontend development Vue Nuxt TailwindUI, Frontend development Vue Nuxt SEO optimization, Frontend development Vue Nuxt Static site generation, Frontend development Vue Nuxt Performance optimization, Frontend development Vue Nuxt content module, Frontend development Vue Nuxt Headless CMS, Frontend development Vue Nuxt CDN, Frontend development Vue Nuxt SASS, Frontend development Vue Nuxt SEO-friendly, Frontend development Vue Nuxt Dynamic imports, Frontend development Vue Nuxt store, Frontend development Vue Nuxt Lazy loading images, Frontend development Vue Nuxt Webpack optimization, Frontend development Vue Nuxt Async data, Frontend development Nuxt Vue ecosystem, Frontend development Vue Nuxt plugins, Frontend development Vue Nuxt dynamic routes, Frontend development Vue Nuxt Performance best practices, Frontend, Vue, Nuxt, React, Next.js, Vue.js, Nuxt.js, React.js, Next, Vue 3, Nuxt 3, JavaScript, TypeScript, HTML, CSS, Tailwind CSS, SCSS, SASS, Responsive design, SPA, SSR, Static site generation, PWA, Vite, Webpack

👋 Full Stack Developer (React, Node.js, TypeScript) for SaaS platforms, MVPs, and two-sided marketplaces. Part of a full-cycle delivery team - on Upwork since Sep 2010, 14 years in, 300+ contracts shipped, $700K+ earned, 100% Job Success, Top Rated. You get one developer who owns the whole system, plus an agency bench behind her. 💡 Hiring a full stack developer should not mean hiring a React developer and a Node developer in one body. The value is connection: I design how React, the Node.js backend, the database, and business logic move together from day one, so the front end never guesses what the backend means and the backend never returns data the front end does not use. Across 150+ products, that is what keeps React and Node from drifting apart. 🎯 WHAT YOU GET ➜ One accountable full stack developer who scopes honestly, gives a realistic estimate, and ships production-ready code - not two separate implementations stitched together. ➜ A web developer and backend developer in one: I diagnose and fix root causes (slow Node endpoints, CORS and auth errors, dropped env vars, broken React + Node integration), optimize performance, and deliver seamless integration. ➜ A team behind me. If the project grows past one developer, we scale without handing you off to strangers (19,765 hours of high-quality coding delivered). ➜ SaaS: multi-tenant architecture, billing and subscription logic, admin tools, webhook handling, auth and permissions - built for growth in e-learning, real estate, healthcare, fintech, and mobility. ➜ Marketplaces: Stripe Connect flows, booking and availability logic, operator dashboards, multi-role permissions, and complex search, designed as one workflow (buyer, seller, payments, operations). ➜ Backend developer work: REST API design, Express and NestJS services, PostgreSQL and MongoDB data modeling, Redis, event-driven and serverless functions, AWS and Vercel deploys. ➜ Existing codebases: I audit for stability, performance, and code quality, then make step-by-step improvements - no rebuild unless it is truly necessary. ➜ MVPs: a typical V1 ships in 5-6 weeks. One early build I helped ship went on to raise $3M. ➜ Front end: I turn UX designer handoffs into pixel-accurate, responsive UI - React Query strategy, shared TypeScript types, and state that matches the API. 🤖 I use AI coding tools the right way: faster scaffolding, migration prep, and reviews, while architecture, security, data modeling, and API contracts stay human-judged. As a JavaScript developer and software developer at core, I also take python developer work for backend services or data scripts when a project needs it. 🧩 Stack: React, Node.js (nodejs), TypeScript, Express, NestJS, PostgreSQL, MongoDB, Redis, Stripe, AWS, Vercel, Docker, CI/CD. 📊 14 years on Upwork ▪ 300+ contracts ▪ $700K+ earned ▪ 100% Job Success ▪ Top Rated ▪ 150+ products live ▪ 50+ countries ▪ 5,000+ end users on delivered platforms ▪ one MVP scaled to a $3M raise. Roles I take: full stack developer, full stack web developer, react developer, node developer, nodejs developer, backend developer, javascript developer, web developer, software developer, full stack react node developer. 📩 Need a full stack developer for a SaaS platform, marketplace, custom web app, or MVP -- or a backend developer to fix, optimize, and ship an existing React + Node system? Send a message with what you are building and I will give you a direct, practical view of what is involved, fixed-price or hourly.

👩‍💻 Frontend Developer with 5+ years building web and mobile interfaces — from pixel-perfect markup to full Angular applications. I work across the full frontend spectrum: semantic HTML/CSS layouts, responsive design, Figma-to-code implementation, and complete Angular SPAs and Ionic mobile apps. Whether you need clean markup or a scalable app architecture — I've got it covered. 🛠 CORE EXPERTISE: ✅ HTML/CSS & RESPONSIVE DESIGN — Semantic markup, pixel-perfect Figma implementation, mobile-first layouts, cross-browser compatibility ✅ ANGULAR DEVELOPMENT — Enterprise SPAs using Angular (v8–20), TypeScript, RxJS, and modern patterns ✅ IONIC MOBILE APPS — Cross-platform iOS/Android with Ionic + Angular + Capacitor ✅ STYLING — SCSS, Tailwind CSS, Angular Material, PrimeNG, custom component styling ✅ DESIGN TO CODE — Figma → Angular/HTML, pixel-perfect and responsive ✅ ARCHITECTURE & STATE — NgRx, lazy loading, standalone components, scalable structure ✅ API INTEGRATION — RESTful APIs, JWT/OAuth, interceptors, complex data handling ✅ TESTING — Jasmine/Karma, Cypress E2E ✅ LEGACY MODERNIZATION — AngularJS migrations, version upgrades, Web Components with Lit ✅ DEPLOYMENT — Firebase 💻 Tech Stack: HTML5 · CSS3 · SCSS · Tailwind CSS · Angular · Ionic · TypeScript · RxJS · NgRx · Figma · Firebase · Capacitor · Jasmine · Cypress 🎯 Need a frontend developer who can handle both the design layer and the full Angular architecture? Let's talk.

✅ Available for new projects 🚀 I’m a Full-Stack JavaScript Developer specializing in React, Next.js, Node.js (Express.js, NestJS), AWS and scalable backend systems ⚡ 5+ years of commercial experience. I’ve worked on long-term production projects (including $30K+ contracts 💰), delivering reliable solutions, clean architecture, and consistent results. I specialize in building end-to-end applications — from frontend interfaces to backend systems and APIs — with a strong focus on performance, maintainability, and real business needs. I also have solid experience with cloud platforms ☁️ and a strong passion for software engineering. 🚀 Core Expertise 🎨 Frontend Development • React.js (Hooks, Context, Suspense, memoization, lazy loading, performance optimization) • Next.js (SSR, SSG, ISR, App Router, edge rendering) • State management & data fetching: Redux Toolkit, Zustand, MobX, TanStack Query (React Query), caching strategies, server state management • UI: Material UI, Chakra UI, Ant Design, Bootstrap, Tailwind CSS, Radix UI, ShadCN UI • Styling: CSS Modules, SASS, LESS, SCSS, Styled Components, Emotion • Forms & UX: React Hook Form, Formik, Zod validation • Building responsive, fast, and scalable interfaces 🛠 Backend Development • Node.js (Express.js, NestJS, modular architecture) • REST API & scalable backend architecture • Authentication & authorization (JWT, OAuth, session-based auth) • Microservices & event-driven architecture • (MERN) Full-stack patterns (MongoDB, Express.js, React, Node.js / NestJS) • API design: REST, GraphQL, gRPC • Realtime systems (WebSockets, Socket IO) • Message brokers & event streaming: Kafka, RabbitMQ • Background jobs, queues & async processing 🗄 Databases & ORM & Cache • PostgreSQL, MySQL, MongoDB, SQLite, MS SQL, DynamoDB • Prisma, TypeORM, Sequelize, Mongoose, Drizzle, Knex, Kysely, MikroORM • Database design & optimization • Redis 🔗 Full-Stack & Integrations • API integrations (third-party services, SaaS) • Payment integrations (Stripe, Braintree, Pay com etc.) • Real-time systems (WebSockets, Socket IO) • Media & streaming (WebRTC, HLS) • File uploads, payments, notifications • Building SaaS platforms, dashboards, and marketplaces ⚙️ Tools & Environment • JavaScript (ES6+, ESNext) | TypeScript • Git (GitHub, GitLab, Bitbucket) • CI/CD basics, GitHub Actions, pipelines • Cloudflare, Vercel, Google Cloud Platform (GCP), AWS (Lambda, S3, EC2, Amplify etc.), Serverless (SST) | Docker • Ngrok, Envoy • Agile workflows (Scrum, Kanban) using Jira / Asana / ClickUp / Trello 💡 What you can expect from me ✔ Clean, readable, and maintainable code ✔ Strong problem-solving skills ✔ Clear and fast communication ✔ Ability to work independently or in a team ✔ Focus on delivering real value, not just completing tasks 📈 Experience Highlight • Long-term contract ($30K+ earned 💰) • 5⭐ client feedback • 800+ hours worked on production system • Experience working on large-scale Next.js applications 🤝 Let’s work together Fluent in English 🇬🇧 | Agile mindset | Ready to start immediately If you’re looking for a developer who can take ownership, suggest better solutions, and deliver stable results — feel free to reach out. Just drop me a message and let’s chat 💬 🏷 Highlighted skills Web Development, Application Development, JavaScript (JS), TypeScript, Full-Stack Development, Front-end Development, Back-end Development, React, Next.js, Node.js, Express.js, NestJS, Redux, Zustand, MobX, HTML, CSS, SCSS, Tailwind CSS, Styled Components, Radix UI, ShadCN UI, Material UI, Chakra UI, Ant Design, REST API, GraphQL, gRPC, API Development, API Integration, PostgreSQL, MongoDB, MySQL, SQLite, DynamoDB, SQL, Prisma, TypeORM, Sequelize, Mongoose, Drizzle, Knex, Kysely, MikroORM, AWS, Serverless, Vercel, Cloudflare, Google Cloud Platform, Docker, CI/CD, GitHub Actions, WebSockets, Socket IO, WebRTC, HLS, Kafka, RabbitMQ, Redis, SaaS, Microservices, System Design, Software Architecture, Payments Integration (Stripe, Braintree, Pay com), Dashboards, Admin Panels, CRM, ERP, CMS 📅 Last updated: April 3, 2026

Senior Full-Stack Developer | Angular • React • Node.js • TypeScript | ag-Grid & React-Admin Expert I help businesses build and modernize scalable web applications using Angular, React, Node.js, and TypeScript. With 10+ years of hands-on experience, I deliver production-ready solutions focused on performance, maintainability, and long-term scalability. What I bring to your project: • Full-stack expertise with Angular and React frontends paired with Node.js / Express / NestJS backends • Advanced TypeScript development across the entire stack • Enterprise-grade admin panels and internal tools using React-Admin and AdminJS • Complex data grids and high-performance table systems with ag-Grid • REST APIs, PostgreSQL, MongoDB, Redis, and third-party integrations • Clean architecture, automated testing, CI/CD, and scalable application structure • Strong debugging, refactoring, and legacy system modernization skills • Clear communication and proactive problem-solving mindset I'm your go-to developer if you need: ✓ A scalable web application built from scratch ✓ Enterprise admin dashboards and internal systems ✓ ag-Grid customization and performance optimization ✓ Legacy Angular/React modernization and migration ✓ Performance optimization and code refactoring ✓ Technical leadership for your development team ✓ AI-generated code audit and stabilization ✓ AI code debugging and refactoring I specialize in working with complex existing systems, improving reliability, maintainability, and developer experience while helping teams move faster with confidence. Let’s discuss how I can help bring your project to production successfully

🚀 Full Stack Developer and API Developer with 3+ years of experience shipping production web apps, backend systems, and automated workflows. As a Full Stack Developer, I delivered 40+ projects across SaaS platforms, internal tools, and dashboards — reducing delivery timelines by 30%. Every Full Stack Developer project I take on covers the entire lifecycle from database schema to polished UI. Clients hire me as a Full Stack Developer because I own both frontend and backend end-to-end. 🔧 Backend Developer & API Developer — As a Backend Developer, I build high-performance REST APIs using Node.js, TypeScript, and Prisma ORM with PostgreSQL, MySQL, MongoDB. My work as a Backend Developer includes architecting API layers handling 50K+ requests/day with 99.9% uptime, reducing response times by 60%, and integrating 20+ third-party APIs. This Backend Developer delivers production-ready, well-documented APIs. Every Backend Developer solution is optimized for Node.js performance and scale. As a Backend Developer, I write Node.js code that is maintainable, tested, and ready for production traffic. ⚛️ React Developer & Frontend — As a Full Stack Developer and React Developer, I build responsive interfaces with React and Next.js. My React Developer and React web developer expertise covers SSR, routing, and state management across apps serving 20K+ monthly active users. As a React web developer, I improved page load speed by 45% through code splitting and lazy loading — measurable SEO gains. This Full Stack Developer delivers pixel-perfect React Developer frontends. 🗄️ Database Design — As a Full Stack Developer and Backend Developer, I work across PostgreSQL, MySQL, MongoDB. Query tuning cut costs by 40%, reduced P95 latency from 800ms to under 120ms. My Backend Developer approach with Node.js ensures your data layer scales. A Backend Developer who understands both SQL and NoSQL is essential for modern apps. 🎬 Nexrender Expert & Video Automation — My niche as a Full Stack Developer. I built video rendering pipelines using Nexrender and After Effects templates, processing 500+ videos/week. My Nexrender workflows include dynamic data injection and scalable worker pools — reducing manual production by 90%. As a Backend Developer powering Nexrender with Node.js, I turn hours into one API call. My Nexrender setup runs on custom Node.js workers. I am one of the few Full Stack Developer professionals who deployed Nexrender in production. Every Nexrender integration includes monitoring and Nexrender template versioning. This Nexrender expertise with Node.js is rare. My Nexrender solutions processed 25,000+ videos. Nexrender automation is my edge as a Backend Developer and Full Stack Developer. 📱 Mobile App Developer — As a Full Stack Developer and mobile app developer, I extend web platforms into mobile using React Native. My mobile app developer skills with Backend Developer expertise enable end-to-end delivery from Node.js API to mobile. Every mobile app developer project uses shared Backend Developer and Node.js infrastructure. 🤖 AI Integration — As a Full Stack Developer working with AI, I integrate ML APIs and build AI-powered features. My AI solutions use Node.js backends and React frontends for smart dashboards, AI chatbots, and analytics. Combining AI with Backend Developer skills drives data-driven decisions. Every AI feature needs a solid Backend Developer foundation. 🌐 WordPress Developer — As a Full Stack Developer and WordPress developer, I build custom themes, plugins, and headless setups. My WordPress developer work connects to Node.js backends. As a WordPress developer, I combine easy CMS with Full Stack Developer and Backend Developer power. ⚙️ Automation & DevOps — As a Full Stack Developer and Backend Developer, I automate workflows, eliminating 25+ hours/week of manual work. Docker, Nginx, CI/CD, Linux admin — reduced deployment time by 70%, maintained 99.9% uptime across 10+ environments. This Full Stack Developer and Backend Developer handles Node.js infrastructure from day one. Hiring a Full Stack Developer who is also a Backend Developer means one person covers your entire stack with Node.js expertise. 💻 Tech Stack: Node.js · TypeScript · JavaScript · React · Next.js · REST API · Prisma ORM · PostgreSQL · MySQL · MongoDB · Docker · Nginx · Git · Nexrender · After Effects · AI · React Native 🤝 As a Full Stack Developer, I deliver clean, documented code. Whether you need a React Developer, Backend Developer, WordPress developer, mobile app developer, or complete Full Stack Developer — I think in systems. Choose a Full Stack Developer who delivers. Ready to build? Let's talk. 🚀