⭐️⭐️⭐️⭐️⭐️ Top 1% Expert-Vetted Web Developer on Upwork 📍 No short-term projects 📞 Kick-off with the team is mandatory 🧨 Available for a quick project start ★ Top-100 Service Provider by Clutch ★ $500M+ Raised by clients ★ 99+ International Awards ★ 15+ years of expertise (NOKIA, OPERA, OPPO, UDEMY, AUTH0, etc.) 👋 Hi, I'm Sergii! I'm a senior front end web developer, React developer, web developer, full stack developer Next.js specialist, and front end developer React with 10+ years of experience building SaaS platforms, AI products, eCommerce solutions, and custom web applications. Over the years, I've helped launch 100+ products using React, React NextJS, Next.js, and modern JavaScript frameworks. As a web app developer and SaaS developer, my work combines technical architecture, front-end engineering, and product thinking to create scalable applications that deliver measurable business results. 🏆 Why Clients Work With Me ✔ 100+ React, React Next, and Next.js projects delivered ✔ 50+ fully launched SaaS, AI, fintech, and eCommerce products ✔ $500M+ raised by companies I've supported ✔ 20+ long-term Upwork clients ✔ 30+ Shopify and Shopify Webflow projects completed ✔ Mobile and web products used by thousands of daily users ✔ 10+ years as a front end developer React specialist building high-performance interfaces 🚀 Core Expertise Front-End Development React As a front end developer React, react developer, front end web developer, and front end designer, I've built modern interfaces for startups, enterprise software, and high-growth SaaS companies that succeed. Using React, React NextJS, Next.js, TypeScript, Tailwind, and modern UI frameworks, I develop scalable products focused on performance, accessibility, and maintainability. My front-end architecture has helped companies reduce load times, improve conversions, and accelerate development with reusable component systems. React & Next.js Development I've delivered 100+ React and Next.js applications, including SaaS platforms, dashboards, marketplaces, AI tools, and enterprise software. As a front end developer React, React developer, and full stack developer Next expert, I build SSR applications, SEO-friendly architectures, scalable APIs, and reusable design systems that support long-term product growth as a full stack web developer and SaaS developer. Mobile App Development I also specialize in mobile app development using React Native, helping companies launch scalable cross-platform applications. As a mobile app developer, I've delivered products for healthcare, fintech, logistics, education, and SaaS companies -- from mobile app design and architecture to deployment and optimization. My experience includes React Native Mobile applications and React Native Full Stack solutions connected to cloud infrastructure and modern APIs. Shopify & Webflow I've completed 30+ Shopify and Shopify Webflow projects, helping brands improve customer experience, storefront performance, and conversion rates. As a Shopify front end developer, I build custom themes, Shopify Hydrogen storefronts, headless commerce solutions, and modern eCommerce experiences. I also work with Webflow teams to bridge design and development through scalable implementations and performance optimization. AI & Python As a front end developer React and Python specialist, I've contributed to AI-powered SaaS products featuring OpenAI integrations, vector search, intelligent chat interfaces, workflow automation, and custom dashboards. My experience combines Python APIs, LLM technologies, automation workflows, and modern SaaS architecture to build AI products that scale. 💻 Technology Stack React • React Next • React NextJS • Next.js • React Native • React Native Mobile • React Native Full Stack TypeScript • JavaScript • Node.js • NestJS • Express • Fastify Shopify • Shopify Webflow • Webflow • WordPress MongoDB • PostgreSQL • MySQL AWS • Google Cloud • Azure Tailwind • Storybook • Redux • GraphQL 📈 Proven Experience During 10+ years as a front end web developer and front end developer react, I've helped startups and enterprise businesses launch products from MVPs to enterprise SaaS platforms. More than 100 React and Next.js applications have been successfully delivered with a focus on scalability, clean architecture, and long-term maintainability as a web developer, web app developer, and full stack web developer. I've completed 30+ Shopify and Shopify Webflow implementations as a Shopify front end developer React, creating custom storefronts, headless commerce experiences, and conversion-focused user journeys. 💎 Whether you need a front end developer React, Shopify front end developer React, React Native Full Stack developer, mobile app developer, web developer, web app developer, SaaS developer, full stack web developer, Webflow expert, or full stack developer Next.js partner, I'd be happy to discuss your project!

⭐️Your 𝐑𝐄𝐋𝐈𝐀𝐁𝐋𝐄 tech partner who won’t miss 𝐃𝐄𝐀𝐃𝐋𝐈𝐍𝐄𝐒⏰,won’t break the 𝐁𝐀𝐍𝐊 💰 and will deliver a 𝐒𝐂𝐀𝐋𝐀𝐁𝐋𝐄 𝐒𝐎𝐋𝐔𝐓𝐈𝐎𝐍📈that won’t need to be rebuilt from scratch later🔧 💡 138+ production-grade products shipped (SaaS, MVPs, AI systems, marketplaces) 💰 $17.2M+ revenue generated for client products 👥 168K+ active users powered by systems I built ⚡ 1.15M+ API requests/month at 99.9% uptime 🚀 MVP → production in 2–6 weeks, built to scale from day one 🔥 WHY SHOULD YOU HIRE ME 10+ years as Front End Developer, React Developer, and Full Stack Developer React Node delivering SaaS Platforms, MVPs, AI Products, Marketplace Platforms, CRM Systems, and Enterprise Web Applications. 138+ production products shipped as Front End Developer, React Developer, and Full Stack Developer React Node. 43+ SaaS Platforms delivered as React Developer and Full Stack Developer React Node using React.js, Next.js, TypeScript, Node.js, PostgreSQL, Supabase, and AWS. 33+ frontend applications built as Front End Developer including dashboards, admin panels, customer portals, responsive UI, and complex business platforms. 27+ backend systems developed as Full Stack Developer React Node with Node.js, Express.js, NestJS, REST API, GraphQL, databases, authentication, and cloud infrastructure. 16+ Marketplace Platforms built as React Developer and Full Stack Developer React Node with payments, subscriptions, workflows, and scalable architecture. 13+ AI Products created as React Developer using OpenAI API, Claude API, RAG, AI Agents, LangChain, and automation. INDUSTRIES I SERVE For LegalTech founders - 6+ Case Management Systems, Document Workflows, Client Portals, Compliance SaaS For Healthcare & MedTech - 8+ Patient Platforms, Telehealth, HIPAA-Compliant data, Clinic Management SaaS For Logistics & supply chain - 5+ Logistics Platforms, real-time tracking (sea/air/truck), Project44, INTTRA, EDI For Marketplace & e-commerce - 15+ Multi-Vendor Marketplaces, B2B & Two-Sided Marketplace, Stripe, bidding, complex search For AI startups - 12+ AI-Powered products: OpenAI / Claude API / LLM, RAG Chatbots, AI Agent Platforms, vector DBs, FastAPI, browser extensions For No-code & enterprise SaaS - 10+ Form Builders, Admin Dashboards, Internal Tools, Microservices, Multi-tenant For Media, AdTech & publishing - 6+ Publisher Platforms, CMS, payment gateways, Analytics Dashboards For Real estate & PropTech - Property Listings, Bidding & Auction systems, Agent Dashboards RESULTS DELIVERED 168K+ active users powered by applications built as Front End Developer, React Developer, and Full Stack Developer React Node 1.15M+ API requests/month with 99.9% uptime using scalable backend architecture 36% fewer bugs through better React.js architecture and clean development processes 42% faster frontend performance through React optimization and modern UI practices 31% conversion improvement through better UX, React interfaces, and performance improvements 40–60% lower backend latency through Node.js optimization and scalable infrastructure 5–8 weeks faster MVP delivery as Full Stack Developer React Node HOW I BUILD As a Front End Developer I build modern interfaces with React.js, ReactJS, Next.js, TypeScript, JavaScript, Tailwind CSS, Redux, Zustand, React Query, shadcn/ui, responsive design, and reusable components. As a React Developer I create SaaS Platforms, AI Applications, Marketplace Platforms, CRM Systems, dashboards, and web applications focused on speed, scalability, and conversion. As a Full Stack Developer React Node I deliver complete solutions with Node.js, Express.js, NestJS, PostgreSQL, Supabase, Prisma, MongoDB, Redis, REST API, GraphQL, WebSockets, AWS, Docker, and CI/CD. TECH STACK Frontend: React.js, ReactJS, Next.js, TypeScript, JavaScript, Redux, Zustand, Tailwind CSS, shadcn/ui, HTML5, CSS3. Backend: Node.js, Express.js, NestJS, Python, FastAPI, REST API, GraphQL, WebSockets. Database: PostgreSQL, Supabase, Prisma, MongoDB, MySQL, Redis, Firebase. Cloud: AWS, Lambda, EC2, S3, CloudFront, Docker, CI/CD, Vercel, Netlify. AI & Integrations: OpenAI API, Claude API, LangChain, RAG, AI Agents, Stripe, Shopify, Twilio. Looking for a Front End Developer, React Developer, or Full Stack Developer React Node to build, scale, or improve your product? Click "Invite" and let's build a production-ready solution. Keywords: Frontend React Developer, React.js Developer, React Next.js Developer, Full Stack React Developer, Node.js Developer, React Native Developer, Frontend React Engineer, Full Stack Engineer, SaaS Frontend, Marketplace React, High-Performance React, React + Node.js, Next.js SSR, Redux, Zustand, Tailwind CSS, API Integration, Real-Time Systems, Dashboard React, Payments Stripe, Mobile React Native. Frontend React Developer, React.js Developer, React Next.js Developer, Full Stack React Developer,

🟢Looking for a new opportunity. Full stack developer and front end developer with 12 years of experience, father with 7 years of experience:), currently in France. The most important part - I am a real person ready to start your project. Write me! MY ACHIEVEMENTS Healthcare Web Applications serving 20K+ users, including 12K+ in the dental sector, with secure HIPAA-compliant solutions built as a React Developer; 12+ years and 20+ products as a Front End Developer React delivering SaaS platforms, MVPs, modern Web Applications; 31+ successful projects as a Front End Designer building SaaS platforms, dashboards, customer portals, modern Web Applications with a focus on scalable architecture, Web Design, outstanding user experience, Angular Front End development; Full stack node.js react and Python Full Stack building scalable platforms for 15+ countries, helping reduce development costs by up to 40% with shared components and efficient architecture; React Full Stack Developer and Full Stack Developer React Node.js delivering 30+ mobile applications, SaaS products, and real-time streaming platforms used by millions across multiple markets, improving application performance by up to 35% while building reliable systems designed for long-term growth. 🏆 Why Clients Work With Me As a React Full Stack Developer, Front end Developer I focus on delivering practical solutions that balance technical excellence with real business objectives across 31 successful projects. 📌 Front End Development As a Front End Developer React Node.js and Front end developer next.js I've delivered 31 production-ready web applications using React, Next.js, TypeScript, and modern frontend technologies, reducing MVP to Pilot Launch by 5-8 weeks and achieving 35% fewer bugs through Existing Codebase and Productionise work. 📌 Full Stack Product Development As a React Full Stack Developer and Full Stack Developer React Node.js, I build SaaS products, MVPs, business applications serving more than 5 million end-users. AI Powered Development for up to 2× faster product delivery. As a Full Stack Web Developer I integrate backend services supporting business workflows for clients across 15+ countries. As a Full Stack Developer React, I support products beyond launch through performance improvements, architecture enhancements, ongoing development backed by 12+ years of commercial development experience, 30+ successfully delivered software project 🔧 Technologies React, Next.js, TypeScript, JavaScript, Node.js, Tailwind CSS, REST API, PostgreSQL, Docker, Stripe, AWS As a Front end web developer and React Full Stack Developer React Node.js, I've delivered 31 successful projects for clients across 15+ countries, contributing to products serving more than 5 million end-users worldwide. I build applications using clean architecture, reusable code patterns, and scalable development practices for long-term business growth. 🏥 Healthcare Platform As a Front End Developer React, I worked on healthcare applications contributing to products serving more than 5 million end-users by developing responsive interfaces, integrating APIs, optimizing user journeys, reducing page rendering times by up to 35% through frontend performance optimization 🚚 Cargo & Logistics Platform As a React Full Stack Developer and Full Stack Developer React Node.js, I built dashboards, workflow solutions, and integrations as part of 31 successful projects delivered for businesses across 15+ countries, improving on-time delivery rates by up to 30% through workflow optimization. 👥 Recruitment & Hiring Platform As a React Full Stack Developer, I delivered 150+ dashboards, applicant tracking features, workflow automation, advanced search capabilities, integrations powering modern recruitment solutions. 📌 Additional Expertise As a Full Stack Developer React Firebase and Full Stack Developer Supabase React, I collaborate with founders, product managers, and stakeholders across 15+ countries to transform business requirements into intuitive user experiences and scalable technical solutions. My experience also as a Full Stack Developer Laravel, includes working with Python, MERN Stack applications (mern stack), ETL pipelines, and C# Angular enterprise projects, allowing me to create reliable products. Across 31 successful projects, I've worked with existing codebases and built products from the ground up. As a React Developer (FlutterFlow, AWS), UX Designer, I reduced admin friction by 40% through end-to-end product ownership. As a Full Stack Developer React Node.js, I enjoy partnering with ambitious teams to build scalable products backed by 12+ years of commercial experience. My background includes implementing secure authentication flows, integrating payment systems, optimizing application performance, and supporting products serving more than 5 million end-users through multiple stages of growth, while delivering up to 85% faster order processing.

⭐️⭐️⭐️⭐️⭐️ TOP RATED PLUS | Front End Developer | React Developer | Full Stack Developer | Next.js Developer | AI Developer- building scalable, production-grade products used by thousands of users 🚀 🔥 50 COMPLETED JOBS WITH ZERO NEGATIVE FEEDBACK ⭐️ Consistent 5-STAR REVIEWS & LONG-TERM CLIENT PARTNERSHIPS 💼 $200K+ earned on Upwork | ⏱ 8,300+ hours delivered | 🏆 100% Job Success Rate 🌍 40+ products shipped across 18+ countries | 🏅 15+ long-term client partnerships Building a serious product takes more than a polished UI - it takes a Full Stack Developer who understands architecture, scalability, and business impact. I'm a senior Front End Developer and Full Stack Developer with 9+ years building high-performance web apps, SaaS platforms, landing pages, and mobile apps for startups and growth-stage companies with React, Next.js, and Node.js. I keep frontend and backend tightly integrated so every decision serves the business. 📊 Impact & Metrics Products I've shipped serve 10K–100K+ monthly actives and handle 5M+ API requests/month. As a Front End Developer and React Developer I've cut load times 40–60%, lifted conversions 20–35%, and dropped bounce rates 25%+. Recent work: organic traffic +62%, TTI 2–3x faster, and a dashboard rebuild that grew weekly actives from 4K to 18K (+350%) in 4 months. 🏗 Architecture & Scalable Systems As a React Developer I design scalable component systems with Redux or Zustand; with Next.js I build hybrid rendering - SSR, SSG, ISR, API routes - tuned for performance, SEO, GEO, and AEO. As a Full Stack Developer I work in Node.js, ExpressJS, and Python (Django, FastAPI), building REST APIs across PostgreSQL, MySQL, MongoDB, and Supabase, with WebSockets, Docker, and CI/CD on AWS or Vercel cutting release times 50%+. Modular patterns reduce technical debt and bug rates 30–40%. 🤖 AI Development, Agents & Automation I build production-ready AI systems: AI Chatbots, AI Agents, AI Voice Assistants, AI Customer Support, and AI Content Generation - connected to real products, not demos. Using OpenAI GPT, Claude API, Gemini API, LangChain, LangGraph, LlamaIndex, and RAG with Vector DB, I ship multi-step reasoning pipelines, PDF/Document AI, AI Document Processing, and Recommendation Engines. I implement AI Workflow Automation, AI CRM Integration, AI Analytics Dashboards, and AI Search with RAG/CAG, MCP, and LangSmith observability - saving teams 15–25 hours/week. 📱 Mobile Development As a Front End Developer I build cross-platform apps with React Native for iOS and Android - shared logic cuts delivery time 40%. Apps shipped hold 4.5★+ store ratings. 🎨 Design-to-Code As a Front End Developer I turn Figma and Framer into pixel-perfect React interfaces with Tailwind CSS - landing pages, full websites, or redesigns. Consistent Lighthouse 95+ and LCP under 1.8s. 📈 Business-Oriented Engineering As a React Developer I've refactored unstable React codebases into maintainable systems, shipped Next.js platforms that grew organic acquisition, built Stripe subscription and marketplace flows, and handled API integration, cutting infra overhead 20–30%. One Full Stack Developer engagement took a signup funnel from 90 to 240/month (+165%) while halving server costs. ⚡ Performance & Core Web Vitals As a Front End Developer I treat LCP and TTI as real product metrics - 2–3x faster via code splitting, lazy loading, caching, and SSR/ISR. Pages from 6s+ to sub-2s, conversion +38%, bounce −25%. 🔧 Primary Stack Frontend: React.js, Next.js, TypeScript, Redux, Zustand, Tailwind CSS, SCSS, Framer. Backend: Node.js, ExpressJS, Python (Django, FastAPI), REST, GraphQL, WebSockets. AI: OpenAI GPT, Claude API, Gemini API, LangChain, LangGraph, LlamaIndex, RAG/CAG, Vector DB, MCP, LangSmith. Mobile: React Native, native Android. Infra: AWS, Vercel, Docker, CI/CD, PostgreSQL, MySQL, MongoDB, Redis, Supabase. Need a React Developer for a complex SPA or a Full Stack Developer to own the whole product? The stack flexes to fit. 💡 Data-Backed Results at a Glance ✅ 60% faster load times via Next.js rendering & caching ✅ 35% increase in conversion rates through funnel-focused Front End Developer work ✅ 350% growth in active users on a React Developer dashboard rebuild ✅ 62% lift in organic traffic via SEO/GEO/AEO-optimized SSR/SSG ✅ 50% shorter release cycles after CI/CD automation ✅ 40% reduction in mobile delivery time through shared React Native logic ✅ 30% drop in technical debt and bugs via modular components ✅ 25% lower bounce rates after Core Web Vitals work ✅ 165% more signups on a Stripe SaaS funnel rebuild ✅ 95+ Lighthouse scores with sub-1.8s LCP 🤝 How I Work Product-focused, clean architecture from day one, fast iteration without technical debt. As a Full Stack Developer partnered with 40+ founders, CTOs, and product teams, I prefer long-term partnerships. Looking for a Full Stack Developer, Front End Developer, React Developer or AI Developer who thinks in products? Let's talk.

🚀🚀🚀 I help businesses build fast, user-friendly, and SEO-optimized websites that convert visitors into clients. I combine clean front end development with flexible WordPress solutions to deliver measurable business results. Tailored Websites That Help Your Business dive, thrive, and scale 🚀🚀🚀 🏆🏆🏆 Top-Rated Plus WordPress Developer, Front End Developer, Front End Web Developer, WordPress Elementor developer. I have 7+ years of experience in Front End Development. I have 6+ years of experience as a WordPress Full Stack Developer. I’ve completed 150+ projects, maintain a 100% Job Success Score, and have logged 4000+ hours on Upwork. As a WordPress Developer and Website Designer aand WordPress UI UX developer, I create custom WordPress website design solutions using WordPress Elementor, Avada, and other modern builders. I also work with Shopify as a Shopify Developer, delivering scalable eCommerce solutions. My background in web design allows me to bridge the gap between design and development for a creating pixel-perfect websites. I react fast to the client's requirements. I specialize in building SEO-optimized, responsive, and high-performing WordPress websites with clean, maintainable, and scalable code. Every project is crafted to ensure excellent UX UI, strong performance, and long-term growth - helping users dive into content and thrive, following conversion-focused principles inspired by Thrive Theme philosophy. I’ve worked as a Front End Web Developer and Full Stack Web Developer (PHP) on large-scale projects, collaborating closely with backend developers, designers, and project managers. My experience also includes working as a React Developer, building interactive and dynamic interfaces using React and modern JavaScript frameworks. As a WordPress back-end developer, I develop custom functionality, plugins, and integrations using PHP, delivering scalable and efficient solutions tailored to each project's needs. Projects I work with: ✔️ Landing pages ✔️ WordPress website development ✔️ WordPress website design and redesign ✔️ Corporate websites ✔️ Front end projects ✔️ eCommerce websites ✔️ B2B and B2C projects ✔️ SaaS projects Technologies & tools: ✔️ HTML, HTML5, CSS, CSS3, Tailwind CSS, SASS ✔️ JavaScript, Vanilla.js, jQuery, Bootstrap, Canvas ✔️ React, React.js ✔️ PHP, Laravel, API integration ✔️ MySQL, SQL ✔️ WordPress (ACF, Elementor, Bakery Builder, Bricks Builder, Brizy, WooCommerce, BuddyPress, Gutenberg, LearnDash, Divi, Avada) ✔️ SEO optimization ✔️ Shopify ✔️ Parallax, motion animations ✔️ Dashboard development ✔️ Sketch, Figma, Zeplin, PSD, Adobe XD, Adobe InDesign, Adobe Photoshop ✔️ Responsive / Cross-browser / Cross-platform development ✔️ Pixel-perfect implementation ✔️ Git / Bitbucket 🏆 Why my work stands out 7+ years of experience in WordPress and front-end development with 100% Job Success Score 4000+ tracked hours 150+ completed projects for businesses, startups, and agencies 150+ custom website builds, themes, and landing page creation 15+ countries supporting businesses, nonprofits and brands 50+ custom widjets made for Elementor Clean, scalable builds using ACF, Elementor, and custom solutions Focus on performance, SEO structure, and Core Web Vitals Experience with WooCommerce, Stripe integrations, and dynamic content Structured approach that makes websites easy to manage and extend Responsive builds optimized for all devices and screen sizes Strong focus on UX and conversion-driven layouts Projects built with a structured approach typically achieve: • up to 40 - 60% faster load times after optimization • 20 - 40% improvement in user engagement (time on page, interactions) • cleaner UX and structure leading to better conversion flow • scalable architecture that reduces future development time by 30 - 50% Development Areas: Front end development / app Front end developer / SaaS Front end development Front end developer / React developer / React / Front end developer React Frontend web developer for landing pages, corporate sites, dashboards, B2B websites Full stack web developer PHP / Laravel / Ecommerce web developer / Ecommerce website / Shopify developer Front end developer Figma / Front end designer WordPress theme build / WordPress website design WordPress Elementor developer / WordPress ACF developer WordPress WooCommerce developer / WordPress website WordPress developer API / WordPress plugin developer WordPress SEO / WordPress speed optimization WordPress bug fixes and performance / Shopify developer I’m a detail-oriented Web Developer, WordPress developer and a Front end developer with a strong focus on architecture, performance, and scalability. I provide clear daily communication, regular updates, and can commit 40+ hours per week. If you’re looking for a reliable WordPress Developer, Front End Developer, or Full Stack Web Developer who can design and build a website that truly helps your business thrive - let’s discuss your project.

🟢 Available Now | 🥇 Top-Rated Front-End Developer | ⚡ 5+ Years Experience | ⚛️ Expert React.js Developer | 🚀 Build Websites, Landing Pages & Web Apps | 🎨 Figma to Pixel-Perfect Code | 📱 Responsive & Modern UI | 🔄 Ongoing Development & Support Need a Front-End Developer who can build a website from scratch, turn your Figma design into production-ready code, fix issues in an existing application, or support your project long-term? That's exactly what I do. I help startups, agencies, and growing businesses build fast, responsive, modern, and scalable websites and web applications using React.js and modern front-end technologies. Whether you need a landing page, business website, SaaS interface, dashboard, React.js application, Figma-to-HTML conversion, Figma-to-React development, bug fixing, new feature development, or ongoing front-end support, I focus on writing clean code and delivering a polished user experience. 💼 What I Can Help You With 🔹 Website & Web App Development • Modern business websites and web applications • React.js & Next.js applications • SaaS platforms, dashboards, and admin panels • Landing pages and high-converting marketing pages 🔹 Design to Code • Figma → HTML/CSS • Figma → React.js • PSD → HTML/CSS • Pixel-perfect, responsive implementation • Reusable and maintainable UI components 🔹 Fixes, Improvements & Ongoing Development • Front-end bug fixing and troubleshooting • Adding new features to existing applications • UI improvements and website redesigns • Responsive/mobile issues • Performance optimization • API integration and front-end integration • Long-term maintenance and ongoing development ⚛️ Tech Stack React.js | Next.js | JavaScript (ES6+) | TypeScript | Redux | Context API | HTML5 | CSS3 | SASS/SCSS | Tailwind CSS | Bootstrap 5 | Material UI | GSAP | Git | GitHub | Vercel | Netlify | CI/CD I've worked with startups, agencies, and growing businesses to transform designs and ideas into production-ready digital experiences. My approach combines clean architecture, reusable components, responsive design, performance, attention to detail, and clear communication. ⭐ Why Work With Me? ✔️ 5+ years of hands-on front-end development experience ✔️ Strong React.js and modern JavaScript expertise ✔️ Pixel-perfect attention to design and responsive details ✔️ Clean, reusable, and maintainable code ✔️ Fast turnaround without sacrificing quality ✔️ Clear communication and regular progress updates ✔️ Reliable support for both one-time projects and ongoing development Whether you're starting a new website, launching a landing page, building a React.js application, converting a Figma design into code, or need help fixing and improving an existing project, I'm ready to help. 📩 Send me a message with your project details, design, or current issue, and let's discuss how I can help. 🔍 Keywords to find me Front-End Developer, Frontend Developer, React.js Developer, React Developer, Next.js Developer, JavaScript Developer, TypeScript Developer, Web Developer, Front-End Development, React.js Development, Website Development, Web Application Development, Landing Page Development, Figma to HTML, Figma to React, Figma to Tailwind CSS, PSD to HTML, Responsive Web Design, Mobile-First Development, Pixel-Perfect Development, UI Development, HTML5, CSS3, Tailwind CSS, Bootstrap 5, Material UI, Redux, GSAP, Bug Fixing, Front-End Bug Fixes, API Integration, Performance Optimization, Website Redesign, Front-End Development

🚀 Is your MVP taking months instead of weeks? 💡 Tired of hiring a Front End Developer who doesn't understand your business and just writes code? I'm a Front End Developer helping startup founders launch production-ready MVPs in 𝟮–𝟯 𝘄𝗲𝗲𝗸𝘀, using a clear, 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀-𝗼𝗿𝗶𝗲𝗻𝘁𝗲𝗱 development approach. As an Upwork Expert-Vetted React Front End Developer with a Master's in Computer Science and 7+ years of experience building scalable SaaS platforms, dashboards, and custom APIs, I translate complex tech into clear product decisions that drive results. Over those years as a Front End Developer I've worked with startups from idea stage to Series B, as well as enterprise clients like 𝗦𝗮𝗺𝘀𝘂𝗻𝗴, 𝗛𝗼𝗿𝗶𝘇𝗼𝗻𝘀, and 𝗕𝗲𝗻𝘁𝗹𝗲𝘆 - always focusing on fast delivery, clean architecture, and measurable outcomes. 💬 Here's what founders say after working with me as their Front End Developer: "𝘎𝘳𝘦𝘢𝘵 𝘦𝘹𝘱𝘦𝘳𝘪𝘦𝘯𝘤𝘦 𝘸𝘰𝘳𝘬𝘪𝘯𝘨 𝘸𝘪𝘵𝘩 𝘒𝘺𝘳𝘺𝘭𝘰! 𝘏𝘦 𝘥𝘦𝘭𝘪𝘷𝘦𝘳𝘦𝘥 𝘢 𝘩𝘪𝘨𝘩-𝘲𝘶𝘢𝘭𝘪𝘵𝘺 𝘙𝘦𝘢𝘤𝘵 + 𝘛𝘺𝘱𝘦𝘚𝘤𝘳𝘪𝘱𝘵 𝘧𝘳𝘰𝘯𝘵𝘦𝘯𝘥 𝘴𝘵𝘺𝘭𝘦𝘥 𝘸𝘪𝘵𝘩 𝘛𝘢𝘪𝘭𝘸𝘪𝘯𝘥 𝘊𝘚𝘚, 𝘣𝘶𝘪𝘭𝘵 𝘸𝘪𝘵𝘩 𝘤𝘭𝘦𝘢𝘯 𝘤𝘰𝘥𝘦 𝘢𝘯𝘥 𝘴𝘵𝘳𝘰𝘯𝘨 𝘢𝘵𝘵𝘦𝘯𝘵𝘪𝘰𝘯 𝘵𝘰 𝘥𝘦𝘵𝘢𝘪𝘭. 𝘊𝘰𝘮𝘮𝘶𝘯𝘪𝘤𝘢𝘵𝘪𝘰𝘯 𝘸𝘢𝘴 𝘴𝘮𝘰𝘰𝘵𝘩 𝘢𝘯𝘥 𝘥𝘦𝘭𝘪𝘷𝘦𝘳𝘺 𝘰𝘯 𝘵𝘪𝘮𝘦 - 𝘩𝘪𝘨𝘩𝘭𝘺 𝘳𝘦𝘤𝘰𝘮𝘮𝘦𝘯𝘥!" "𝘒𝘺𝘳𝘺𝘭𝘰 𝘥𝘦𝘭𝘪𝘷𝘦𝘳𝘦𝘥 𝘤𝘭𝘦𝘢𝘯, 𝘴𝘤𝘢𝘭𝘢𝘣𝘭𝘦 𝘤𝘰𝘥𝘦 𝘢𝘯𝘥 𝘩𝘢𝘯𝘥𝘭𝘦𝘥 𝘧𝘳𝘰𝘯𝘵-𝘦𝘯𝘥 𝘥𝘦𝘷𝘦𝘭𝘰𝘱𝘮𝘦𝘯𝘵 𝘸𝘪𝘵𝘩 𝘱𝘳𝘦𝘤𝘪𝘴𝘪𝘰𝘯. 𝘊𝘰𝘮𝘮𝘶𝘯𝘪𝘤𝘢𝘵𝘪𝘰𝘯 𝘸𝘢𝘴 𝘴𝘮𝘰𝘰𝘵𝘩, 𝘢𝘯𝘥 𝘩𝘦 𝘸𝘢𝘴 𝘱𝘳𝘰𝘢𝘤𝘵𝘪𝘷𝘦 𝘪𝘯 𝘴𝘰𝘭𝘷𝘪𝘯𝘨 𝘵𝘦𝘤𝘩𝘯𝘪𝘤𝘢𝘭 𝘤𝘩𝘢𝘭𝘭𝘦𝘯𝘨𝘦𝘴. 𝘏𝘪𝘨𝘩𝘭𝘺 𝘳𝘦𝘤𝘰𝘮𝘮𝘦𝘯𝘥𝘦𝘥 𝘧𝘰𝘳 𝘸𝘦𝘣 𝘥𝘦𝘷𝘦𝘭𝘰𝘱𝘮𝘦𝘯𝘵, 𝘈𝘗𝘐 𝘪𝘯𝘵𝘦𝘨𝘳𝘢𝘵𝘪𝘰𝘯, 𝘢𝘯𝘥 𝘱𝘦𝘳𝘧𝘰𝘳𝘮𝘢𝘯𝘤𝘦-𝘧𝘰𝘤𝘶𝘴𝘦𝘥 𝘦𝘯𝘨𝘪𝘯𝘦𝘦𝘳𝘪𝘯𝘨 𝘱𝘳𝘰𝘫𝘦𝘤𝘵𝘴." "𝘏𝘢𝘱𝘱𝘺 𝘸𝘪𝘵𝘩 𝘴𝘱𝘦𝘦𝘥 𝘢𝘯𝘥 𝘲𝘶𝘢𝘭𝘪𝘵𝘺!" Why founders keep me as their long-term Front End Developer: 🎯 Business-first mindset - a Front End Developer who understands your priorities and aligns tech decisions with them ⚙️ Rapid MVP execution - from concept to launch in weeks, not months 🧩 Front End ownership - a senior Front End Developer handling React, Next.js, API integrations, Tailwind, MUI and scalable architectures 🧩 Full Stack ownership - MERN, Express.js, Node.js, MongoDB 🧠 Strategic guidance - more than a Front End Developer: I help you define what truly matters for your first release 📌 Typical projects I take on as a Front End Developer: SaaS dashboards and admin panels - React Front End Developer work with complex state and data-heavy UI MVPs from Figma to production - a Front End Developer who ships, not just prototypes Custom API integrations and internal tools for growing teams Frontend rescue - stepping in as the new Front End Developer on an existing codebase I don't take on last-minute fixes or e-commerce stores - as a Front End Developer I focus on SaaS and MVP projects where clear product thinking makes the difference. If you're a founder looking for a reliable Front End Developer who speaks your language and delivers predictably - let's build something great together. 🛠️ Tech Stack & Tools: Languages & Libraries: React, React.js, Node.js, JavaScript, ReactJS TypeScript, ReactJS NodeJS, Python, PHP, React Native, NextJS, MERN Stack Styling: Material UI, Tailwind CSS, MUI React, custom SCSS / CSS Build Tools: Webpack, Vite, NPM UI/UX: Figma, Frontend Design tools for pixel-perfect visuals Visualization: Leaflet, maps & data-driven charts Databases: MongoDB, PostgreSQL, MySQL, Firebase State Management: Redux, Zustand, RTK Query Cross-browser / cross-platform manual testing

💻 Your reliable front-end and full-stack partner. ⚡ Clean code, fast delivery, no unnecessary complexity. 🎯 React, Next.js — production-ready, not prototype-quality. ❤️ Client-focused, clear communication, on-time delivery. WHY SHOULD YOU HIRE ME 📌 8+ years and 60+ products as a Full Stack Developer specializing in React and Next.js for SaaS Platforms, MVPs, and Web Applications. $3.8M+ in client impact, $900K+ in direct revenue volume generated through my work as a React Developer and Next.js Developer. 📌 20,000+ active users across Web and Mobile Apps where my work as a Front End Developer lifted engagement by 18-27%. 10,000+ users in Healthcare Web Applications and HIPAA-compliant systems where my work as a Front End Developer cut admin friction by 40%. 📌 2,423 completed orders, 489 registered customers in an E-commerce Website and CRM Platform MVP built as a Full Stack Developer with React and Next.js. 90% faster order processing and 80% lower manager workload through workflow automation and Front End Developer improvements. 📌 1,666+ catalog items, 4-role access, 2.7x operational capacity in a B2B Marketplace built as a Full Stack Developer with React and Next.js. 5-8 weeks shorter MVP-to-launch timelines and 35% fewer bugs through clean architecture and code review. 📌 $900K+ in client revenue as a React and Next.js Developer, with 8 years of experience as a Web App Developer building production-grade React applications. 📌 $3.8M+ in client impact with end-to-end ownership as a Full Stack Developer. 18-27% engagement lift and stronger user trust as a Front End Developer. 30-40% faster development cycles and stronger retention across SaaS products as a React Developer. WHERE I DELIVER 📌 As a Front End Developer, 20+ systems built with React and Next.js covering UI development, dashboards, and responsive design across SaaS Platforms, Booking Platforms, and E-commerce Websites. 📌 As a React Developer, 15+ launches in Next.js environments, with 30-40% faster iteration through component-based architecture and design-to-code workflows. 📌 As a Full Stack Developer, 25+ end-to-end builds with React, Next.js, and Node.js backends, covering API development, data architecture, and secure, scalable systems from early-stage MVP to live SaaS platform. 📌 As a Front End Developer, improving conversion by 15-22% through UI polish, UX refinement, and responsive design across web and mobile. 📌 10+ deployed mobile apps in the App Store and Google Play as a React Native Developer, extending the same React codebase to mobile. 📌 12-19% better repeat usage through booking, notifications, and payment flows built with React and Next.js. 📌 As a Full Stack Developer, 6-18 month engagements through platform scaling, feature expansion, and long-term development partnerships built on React and Next.js. 📌 As a Full Stack Developer, 99%+ delivery consistency across distributed teams, with clear communication and predictable delivery timelines. INDUSTRY IMPACT 📌 Marketplace Platforms, B2B Marketplaces, Two-Sided Marketplaces: 50,000+ active listings, 20%+ better lead quality, and a 35% increase in conversion rates as a Full Stack Developer and React Developer handling $2M+ in monthly transaction volume. 📌 Healthcare Web Applications, Clinic Management SaaS, Telehealth: 10,000+ active users, 500+ daily appointments processed, and 15% fewer patient no-shows as a Front End Developer maintaining 99.9% system uptime. 📌 AI-Powered Platforms: 5+ products deployed with custom AI features, built as a React and Next.js Developer integrating AI chatbots, RAG systems, and OpenAI/Claude APIs into full-stack applications. 📌 Logistics Platforms, ERP, Internal Workflow Systems: up to 12 hours saved per order cycle and a 40% reduction in data entry errors across 5+ regional hubs as a Full Stack Developer. 📌 Research Platforms, LegalTech SaaS, Fintech and PropTech MVPs: 18% better adoption and 40% higher user retention over 6 months through structured, permission-based systems built as a Front End Developer. HOW I BUILD 📌 50+ products as a Front End Developer: React, Next.js, React Native, JavaScript, TypeScript, HTML5, CSS3, Tailwind CSS, and responsive design. 📌 25+ SaaS platforms as a Full Stack Developer: Node.js backends, PostgreSQL, MySQL, MongoDB, Firebase, and Stripe integrations across payments, maps, and third-party APIs. 📌 10+ projects across WordPress, Shopify, PHP, Flask, and MERN stack as a Full Stack Developer, adapting React and Next.js to different environments as needed. 📌 40+ products built with strong Git practices, clean software architecture, and an engineer's mindset as a React and Next.js Developer.

🟢 Available Now ✅ Looking for a reliable Front-End Developer who can turn your design into a clean, responsive, and high-performing website? With 7+ years of experience, I specialize in converting Figma, PSD, XD, Sketch, AI, and PDF designs into pixel-perfect, responsive websites using modern front-end technologies. I focus on writing clean, maintainable code that delivers an excellent user experience across all devices and major browsers. What I Can Do ✔ Figma to HTML ✔ PSD to HTML ✔ XD to HTML ✔ Sketch to HTML ✔ AI / PDF / JPG / PNG to HTML ✔ Responsive Website Development ✔ Landing Page Development ✔ Custom HTML, CSS & JavaScript Websites ✔ Bootstrap 5 Development ✔ Cross-Browser Compatible Websites ✔ Website Updates & Bug Fixes Technologies ✔ HTML5 ✔ CSS3 (Flexbox & Grid) ✔ JavaScript ✔ jQuery ✔ Bootstrap 4 & 5 Why Clients Choose Me ✔ 7+ Years of Front-End Development Experience ✔ Pixel-Perfect Design Conversion ✔ Fully Responsive on Mobile, Tablet & Desktop ✔ Clean, Well-Structured & Maintainable Code ✔ Fast Loading & SEO-Friendly Structure ✔ Cross-Browser Compatibility ✔ W3C-Compliant Markup ✔ Clear Communication & On-Time Delivery ✔ 30 Days of Post-Delivery Support Whether you need a landing page, a business website, or a complete front-end conversion from your design files, I'm here to help deliver a professional result. 💬 Feel free to send me a message or invite me to your project. I'd be happy to discuss your requirements. Thank you, Rupa Rani Front-End Developer | Figma to HTML CSS | HTML, CSS, JavaScript & Bootstrap

⭐️ 𝗦𝗽𝗲𝗲𝗱 𝘄𝗶𝘁𝗵𝗼𝘂𝘁 𝗰𝘂𝘁𝘁𝗶𝗻𝗴 𝗰𝗼𝗿𝗻𝗲𝗿𝘀: working code on time, every time ⭐️ 𝗕𝘂𝗱𝗴𝗲𝘁 𝗱𝗶𝘀𝗰𝗶𝗽𝗹𝗶𝗻𝗲: every billed hour is justified — no filler tasks ⭐️ 𝗕𝘂𝘀𝗶𝗻𝗲𝘀𝘀-𝗳𝗶𝗿𝘀𝘁 𝘁𝗵𝗶𝗻𝗸𝗶𝗻𝗴: I understand the problem before I write code, so your budget goes into the product, not experiments 🚀 React Developer, Full Stack Developer React, Frontend React Developer — specializing in production-ready SaaS platforms, multi-tenant B2B systems, and AI-powered web applications. ⭐ Top Rated Plus • 6+ years as a React Developer • 70+ projects delivered as a Full Stack Developer React Next.js • 5,000+ Upwork hours as a React Native Developer • ~70% returning clients as a Frontend React Developer WHY HIRE ME 📅 6+ years and 📦 70+ projects mark my work as a Full Stack Developer React Node, building SaaS Platform, MVP, and AI-Powered Web Application solutions. 🔁 ~70% of clients return — a track record built as a React Developer through partnerships lasting months to years, working as a Frontend React Developer and Full Stack React Developer. ⏱️ 5,000+ Upwork hours logged as a React.js Developer, Node.js Developer, and React Native Developer. ⭐ Top Rated Plus status reflects steady delivery as a Front End Developer and Nextjs Developer, with a track record of on-time launches. WHERE I DELIVER Working as a Full Stack Developer React Node, I built a multi-tenant B2B SaaS platform with React, Next.js, and Node.js — OWASP-compliant authentication, role-based access control, custom workflow logic, and full Stripe billing (Subscriptions and Connect), backed by PostgreSQL via Prisma with REST and GraphQL APIs on AWS. Building as a React Developer with the OpenAI and Anthropic APIs, I developed an AI-powered SaaS product with React, Next.js, Node.js, and Supabase — RAG pipelines, embeddings, semantic search, real-time streaming, Stripe Checkout billing, and an offline-ready PWA on Vercel. My work as a Frontend React Developer covers two-sided marketplaces, e-commerce platforms, booking and scheduling systems, real-time chat, analytics dashboards, and internal tools. Complex features like authentication flows, payment processing, real-time data, and third-party integrations fall under my Front End Developer work. Deep App Router, Server Components, SSR, SSG, and ISR experience comes from my time as a React Next.js Developer and Node.js Developer, plus API routes and middleware. Core Web Vitals, accessibility, and responsive, cross-browser interfaces are where my Full Stack React Developer background shows. The same product extends to iOS and Android through my React Native Developer work with React Native and Expo. Production-ready code from MVP to scale is what I deliver as a Web App Developer React and React App Developer. REST and GraphQL APIs, authentication flows, and background jobs for high-traffic products come out of my Node js Developer and Full Stack Developer React Node experience. SEO-friendly, fast-loading storefronts and marketing sites come from my React Web Developer and Nextjs Developer work. TECH STACK On the frontend, I build with React, Next.js, and TypeScript, styling with Tailwind CSS and Shadcn/ui and handling state with Redux or Zustand — whatever keeps the codebase easy to hand off. The backend runs on Node.js, usually via Express or NestJS, talking to PostgreSQL through Prisma, or to Supabase and Firebase when a project needs managed auth and real-time out of the box, exposed through REST or GraphQL APIs. I deploy to AWS or Vercel with GitHub Actions running CI/CD, so every push ships cleanly. When a project calls for OAuth, webhooks, transactional email via SendGrid, or automation through Zapier, that comes built into the stack, not bolted on later. MIXED-STACK SUPPORT Python, PHP, Laravel, MySQL, MongoDB, Redis, WordPress, Java, FastAPI, jQuery, and Web3 round out a broader Python Developer, Wordpress Developer, and React Web Developer skill set — and as a Mobile App Developer, I pick up inherited code and mixed stacks quickly. INDUSTRIES SaaS & B2B, AI Startups, Marketplaces & E-commerce, Fintech, Healthtech, Ed-tech, and Real estate — where my React Developer and Full Stack Developer React Node work has landed. WHAT CLIENTS HIRE ME FOR Scalable web applications, secure REST and GraphQL APIs, high-performance Next.js front-ends, and reliable, production-ready SaaS — that's what clients bring me on for as a React Developer, Full Stack Developer React Node, and Frontend React Developer, backed by 📦 70+ projects, 📅 6+ years, and 🔁 ~70% returning clients. Building, scaling, or improving a product? I work as a React Developer, Full Stack Developer React Node, Frontend React Developer, React Native Developer, and Nextjs Developer — let's talk on a quick call. 👇