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🙋🏻‍♂️Hello, I'm a passionate Frontend React Next.js Developer with 4+ years in Web Development Skills: React Next.js TypeScript Tailwind Bootstrap Material-UI Redux Toolkit HTML5 CSS API Git etc ⬇️ 👨🏻‍💻 As a Frontend Developer, I can help you with 👨🏻‍💻: 💼 Collaborating with your team to code efficiently and achieve your goals. 🧰 Developing Web Apps from scratch | SaaS AI CRM ERP Marketplace Client Portal etc. 🧰 Developing MVP from scratch. 🧰 Translating Designs into fully functional Web Applications. ⭐️ Don't see your task listed? No problem - I can still help! 💼 Team Member Skills: 1.Stack: Frontend: React Next.js Bakend: Node.js MongoDB Express.js PostgreSQL Supabase Firebase 2.Code Quality: Focused on writing clean, readable, and reusable code. 3.Efficiency: Quick coding skills with a strong problem-solving mindset. 4.Security: Knowledgeable in common security practices for web applications. 5.Communication: Experienced in effective collaboration within cross-functional remote teams. 🧰 Web (MVP) App develop skills: 1.Stack: Frontend: React Next.js Bakend: Node.js MongoDB Express.js PostgreSQL Supabase Firebase 2.Technology Selection: Providing insights and recommendations for the most suitable tech stack. 3.Testing and QA: Implementing best practices to enhance testing and quality assurance. 4.Performance and Security: Delivering responsive, secure, and high-performing web apps. 5.Industries: AI SaaS Healthtech Automotive Fintech Edtech E-commerce Logistics Telecommunications IoT (Internet of Things) LegalTech Retail Social Media & Communication Insurtech Tourism & Hospitality Entertainment Industry ⭐️I try to understand the client's needs and focus my efforts on delivering solutions to ensure their success. 📲 What is your task? When are you ready to get the first results? 👨🏻‍💻 Ready to start immediately! Best regards, Oleh 👨🏻‍💻 📖Tech stack: ✓ MERN : React Node.js MongoDB Express ✓ Front-end : React Vue.js Angular Next.js ✓ Bakend : Node.js ✓ Mobile : React Native ✓ HTML HTML5 CSS CSS 3 Sass SCSS Styled Components ✓ Bootstrap Material-UI Tailwind CSS ✓ Redux Toolkit ✓ Els : TypeScript GraphQL WebSockets SQL webRTC Figma API Git 📖Highlighted Skills: MERN Developer : React Node.js MongoDB Express Frontend Developer : React Vue.js Angular Next.js Bakend Developer : Node.js Mobile Developer : React Native 📖Front-End experience: I have extensive experience in front-end development, specializing in React for building reusable UI components, optimizing React performance, and integrating React with state management tools like Redux and React Query. My expertise includes Next.js, which I use for server-side rendering, static site generation, and creating SEO-friendly applications, while also leveraging advanced Next.js features like API routes and incremental static regeneration. Additionally, I excel in TypeScript for writing type-safe code, maintaining large TypeScript-based projects, and enhancing code reliability with TypeScript's static typing system. Updated: 26.12.24

I build React and Next.js applications that are fast, responsive, and stay maintainable as they grow - from pixel-perfect frontends to full-stack features with authentication and payments. A few examples of what I've delivered: • Migrated a complex Excel-based calculator into an interactive, fully-validated web module for a glass installation company - replacing error-prone spreadsheet logic with a reliable UI. • Built responsive, cross-browser frontends with CMS integrations covering ~90% of editable content, so clients can update their sites without touching code. • Delivered a custom admin panel and core UI for an e-commerce cosmetics platform, defining API contracts and adding client-side validation to reduce integration bugs. I specialize in Feature-Sliced Design (FSD) - an architecture that keeps codebases organized as they scale. I care enough about this that I built and published my own open-source ESLint plugin (eslint-plugin-fsd-paths) to enforce FSD import rules automatically, so the structure holds up even on solo or fast-moving projects. Every project I build includes real testing: unit tests, React Testing Library, Cypress E2E, and visual regression - not just "it works on my machine." Stack: React, Next.js (SSR/SSG/CSR), TypeScript, Redux Toolkit, RTK Query, Zustand, React Hook Form + Zod, Tailwind CSS, Prisma, PostgreSQL, NextAuth.js, Strapi/Directus CMS, GitHub Actions, Jest, React Testing Library, Cypress. Open to freelance projects involving e-commerce, SaaS dashboards, or apps with real architectural complexity. Message me with what you're building - happy to take a look and share how I'd approach it.

💻 Senior Full Stack Developer Freelancer ⚡ 5+ Years of Experience 🚀 10+ Successfully Delivered Projects 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 ⚛️ React.js ▲ Next.js 📘 TypeScript 🔄 Redux 🕸️ GraphQL 🔌 REST API 🎨 HTML5 / CSS3 / SCSS 🧩 Material UI / Bootstrap 📦 Webpack 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 🟢 Node.js 🏗️ NestJS / Express.js 🗄️ PostgreSQL / MongoDB 🔐 JWT Authentication ⚡ SocketIO ☁️ AWS / Firebase / Heroku 🔗 REST APIs & Integrations 𝗠𝗼𝗯𝗶𝗹𝗲 📱 React Native 🚀 Expo / React Native CLI 🍎 iOS / 🤖 Android 🧪 TestFlight / Firebase Distribution 🛠️ Android Studio / Xcode / VSCode Let's chat mate!

⭐️⭐️⭐️Your reliable tech partner combining 10+ years of engineering expertise with 𝐀𝐈-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 🤖 to deliver scalable, production-ready solutions in record time 🚀 - without missed deadlines, budget overruns, or technical debt. 💡 116 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. 116 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,

👋 Welcome to my profile! I'm Ievgenii, a Full-Stack Developer specializing in Node.js, Express.js, GraphQL, PostgreSQL, MongoDB, also React.js and Next.js,. With 2 years of experience, I am passionate about crafting robust and efficient web applications that deliver exceptional user experiences. 💻 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐚𝐭𝐢𝐨𝐧: Node.js: Developing server-side logic and building scalable backends using JavaScript. Express.js: Constructing RESTful APIs and handling server-side routing and middleware. GraphQL: Implementing efficient and flexible APIs for data fetching and manipulation. PostgreSQL: Designing and managing relational databases to ensure data integrity and efficiency. MongoDB: Implementing NoSQL databases for scalable and flexible data storage. React.js: Building dynamic and interactive user interfaces using reusable components. Next.js: Creating server-rendered React applications with enhanced performance. 🚀 𝐌𝐲 𝐀𝐩𝐩𝐫𝐨𝐚𝐜𝐡: I strive to deliver high-quality code that meets client requirements and follows industry best practices. Whether it's developing complex features, optimizing performance, or troubleshooting issues, I approach every project with attention to detail and a focus on delivering scalable and maintainable solutions. 📚 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞: During my career, I have worked on a diverse range of projects, including e-commerce platforms and content management systems. My expertise extends to back-end development, database management, API implementation and front-end development. 💪 𝐒𝐤𝐢𝐥𝐥𝐬𝐞𝐭: Back-end: TypeScript, Nest.js, Node.js, Express.js, RESTful APIs, GraphQL, Sequelize, Mongoose, AWS. DataBase: MongoDB, PostgreSQL. Tools & Libraries: AWS Lambda, Git, EmailJS, Nodemailer, MUI, NPM, Jira, ESLint, Prettier. Deployment & Hosting: Heroku, Netlify, Vercel, Firebase. Front-end: HTML5, CSS3, JavaScript, React.js, Next.js, Redux, TypeScript. ⏰ 𝐌𝐲 𝐰𝐨𝐫𝐤𝐢𝐧𝐠 𝐡𝐨𝐮𝐫𝐬: 18 pm - 12 pm EEST (GMT+3) - Ukraine 🇺🇦 🤝 𝐋𝐞𝐭'𝐬 𝐂𝐨𝐧𝐧𝐞𝐜𝐭: If you're looking for a dedicated Full-Stack Developer with expertise in React.js, Next.js, Node.js, Express.js, GraphQL, PostgreSQL, and MongoDB, I'm eager to discuss your project further. Let's work together to create powerful and scalable web applications that exceed your expectations. 💬 I look forward to hearing from you! 🔑 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: JavaScript, HTML, CSS, RESTful APIs, Server-side programming, Client-side programming, Front-end development, Back-end development, Web development, Responsive design, Version control (Git), MVC architecture, Web performance optimization, Database management, Agile development, Test-driven development (TDD), Continuous integration/continuous deployment (CI/CD), Debugging and troubleshooting, User interface (UI) development, User experience (UX) optimization, Cross-browser compatibility, API integration, Authentication and authorization, Web security best practices, Performance monitoring and optimization, DevOps principles, Cloud platforms (AWS, Azure, Google Cloud), Containerization (Docker, Kubernetes), Microservices architecture.

Hi! If you are looking for a talented and skillful front-end developer who is always ready to create a solution for your project, you found a perfect fit! 🏆 I have 5+ years of commercial experience as a front-end developer and QA background that also put in the added value I am proficient and can use on your project: 💠 React.js(react-router-dom, react-redux, react-hooks) 💠 Next.js 💠 Rest API, Redux, Redux-Saga 💠 Firebase (Realtime / Database / Cloud / Hosting) 💠 JavaScript (ES6+) 💠 TypeScript 💠 HTML, HTML5, CSS 💠 SASS preprocessor / Styled-components 💠 Responsive Web design(RWD), Bootstrap / Material-UI 💠 Jira/Trello I am great at: 💡 Providing time estimation 💡 Assisting with all stages of SDLC 💡 Writing a well-structured code and testing it 💡 Providing good interpersonal skills by analyzing client requirements by word of mouth My essential qualities are: 💯 Self-driven and always open to face new challenges 💯 Good mathematical, algorithmic, and analytical background 💯 Excellent problem-solving skills 💯 Quick learning and applying of new technologies 💯 Strong interpersonal, presentation and communication skills 💯 Excellent time management and organization skills 📥 Just shoot me a message and I'll help you implement your ideas into prosperous results!