🏅 Upwork-Certified React Developer & React Native Developer 🏅 👋 I'm a Senior React Frontend Developer and React Native Developer with 8+ years turning complex product requirements into fast, maintainable, production-ready applications. 10,000+ hours of development. 50+ shipped projects. Clients in fintech, healthcare, e-commerce, and B2B trust me because I think like a product owner, not just a React Developer. 💻 What I Build as a React Developer, React Frontend Developer & React Native Developer 📍 Mobile - React Native Developer & React Native Developer Expo As a React Native Developer, I architect cross-platform apps that feel native on both iOS and Android. My React Native Developer Expo projects have reached 50,000+ daily active users, and I've taken 15+ startups from zero to funded MVP. Every React Native build I ship is optimized, documented, and ready to hand off to your team. 📍 Frontend - React Frontend Developer & Frontend Developer React As a Frontend React Developer, I obsess over the gap between design and implementation. Pixel-perfect isn't a goal - it's a baseline. Working with me as your Frontend Developer means your UI matches design intent on every screen size, every browser, every time. I've lifted engagement metrics by 30% simply by tightening interaction patterns and accessibility. 📍 Performance - Next.js TypeScript & React Developer Next.js My React Developer Next.js work is defined by measurable outcomes: sub-2-second load times, 95+ Lighthouse scores, and bundle sizes that don't balloon as features grow. As a Next.js TypeScript specialist, I choose between SSR, SSG, and ISR based on your actual data patterns - not defaults. Next.js TypeScript development done right means your infrastructure bill goes down as your user count goes up. 📍 AI Integration - Next.js TypeScript & React Developer Next.js I've integrated OpenAI APIs into customer-facing products — semantic search, streaming assistants, and context-aware recommendations — all built in Next.js TypeScript with proper error boundaries and fallback states. As a Frontend React Developer, I treat AI features with the same engineering discipline as any other production system. 📍 APIs & Data - Frontend React Developer & React Native Developer Clean REST and GraphQL integration is table stakes. What I bring as a Frontend Developer React expert is awareness of both sides of the contract - I catch schema mismatches early, build optimistic UI that keeps users moving, and handle edge cases your backend team hasn't documented yet. Across 25+ projects, zero auth breaches. 📍 State & Architecture - React Developer & SaaS Developer Redux and Zustand aren't tools I reach for by habit - as a React Developer, I map your data flow first, then choose the right state shape. This Frontend Developer React discipline is what keeps large codebases from accumulating silent bugs. I've reduced state-related defects by 35% on teams that inherited messy global stores. 📍 SaaS & Scale - SaaS Developer & Frontend Developer As a SaaS Developer who has built across subscription tiers, multi-tenant architectures, and real-time dashboards, I understand the operational pressures your product faces. Whether it's a greenfield SaaS Developer platform or a legacy migration, I structure components for reuse and design systems for longevity - so your team ships faster six months from now than they do today. 📊 Numbers That Matter 50,000+ daily active users across React Native Developer Expo projects 95–100 Lighthouse scores, consistently, across Next.js TypeScript builds 30% engagement lift as a detail-driven Frontend React Developer 35% fewer bugs through intentional state architecture 99.9% uptime across real-time SaaS Developer dashboards 100% client satisfaction - every engagement, every time 💼 Why Work With Me I'm a React Frontend Developer who asks hard questions before touching the codebase. A React Native Developer who thinks about app store performance from day one. A SaaS Developer who knows that fast MVP delivery and clean architecture aren't opposites. And a Frontend Developer React partner who will push back on decisions that create long-term debt - because your product deserves better than shortcuts. Looking for a Senior React Developer, React Frontend Developer, or React Native Developer who communicates clearly, ships reliably, and treats your product like their own? 👉 Let's talk - available now ⚡ React.js · Next.js · TypeScript · React Native · Expo · Redux · Zustand · Tailwind CSS · GraphQL · REST API · OpenAI · SaaS · Fintech · Healthcare · B2B · Web Apps

🚀 Built products serving 5M+ daily users and supporting $100M+ monthly transactions. Our clients get scalable, high-performance applications with predictable delivery, transparent communication, and long-term engineering support. 📍 Full Stack Developer expertise (React, Next.js, Node.js, TypeScript) 📍 React Developer & Next.js Developer specialists 📍 Mobile development with React Native 📍 AI-powered products and business automation 📍 Dedicated in-house engineering team 📍 Long-term partnerships, not one-time engagements 📍 Fast onboarding within 48 hours 📩 Send me a message for a project review and team recommendation. Who We Are I'm Anastasia from Koitechs 👋 I help companies hire reliable in-house developers who integrate seamlessly into existing teams and start contributing quickly. Whether you need a single full stack developer or an entire delivery team, we provide experienced specialists ready to work as an extension of your business. Unlike agencies that rely on freelancers, our developers are fully in-house, technically vetted, and supported by internal engineering processes. This means stable communication, accountability, and consistent delivery throughout the project lifecycle. What We Build: ✅ SaaS Platforms ✅ AI-Powered Applications ✅ Marketplaces & Multi-Vendor Platforms ✅ E-commerce Solutions ✅ CRM & ERP Systems ✅ Real-Time Applications ✅ Internal Business Tools ✅ Mobile Apps ✅ Enterprise Web Platforms Technologies We Use: Frontend: React.js, Next.js, TypeScript, JavaScript, Redux, Tailwind CSS, HTML5, CSS3 Backend: Node.js, NestJS, Express.js, REST API, GraphQL, WebSockets Databases: PostgreSQL, MongoDB, Prisma, Supabase, Firebase Cloud & Infrastructure: AWS, Docker, Vercel, Git Testing & Quality: Jest, Cypress, Storybook How We Work: ✔ Full-stack development from architecture to deployment ✔ Pixel-perfect Figma to React / Next.js implementation ✔ Daily updates and transparent communication ✔ Code reviews and QA at every stage ✔ Agile delivery process ✔ Flexible scaling from one developer to a dedicated team Results We Delivered: 📊 5M+ daily active users supported 📊 $100M+ monthly transactions processed 📊 99.99% uptime for high-load systems 📊 22% increase in e-commerce conversion rates 📊 75% repeat clients Why Clients Choose Koitechs: ⭐ In-house team only — no outsourcing chaos ⭐ Strong expertise in React, Next.js, Node.js, and full-stack development ⭐ Fast candidate matching within 48 hours ⭐ 2-week trial period available ⭐ Clear communication and predictable delivery ⭐ Long-term partnership approach If you're looking for a reliable full stack developer, react developer, next.js developer, or a complete product team to build scalable web and mobile applications, I'd be happy to discuss your project and recommend the best fit. 📩

Hi everyone! 👋 ✅ I am a skilled Full-Stack React Native, React Developer with over 6 years of experience ✅ My strong skill-set: React Native, Node.js, React, Next.js, Nest.js, Express.js, JavaScript, TypeScript Development What I can propose: 🏆 Expert in Mobile, IOS, and Android development. 🏆 Comprehensive Front-End development using advanced technologies; 🏆 Reliable Back-End solutions that provide scalability and performance. As a Full-Stack Developer, I contribute to a variety of projects across multiple domains.I have over 5 years of professional experience in front-end and back-end development. I have a strong understanding of how users interact with web applications, and I am skilled in creating user-friendly and responsive interfaces. 𝗪𝗵𝗮𝘁 𝘁𝗼𝗼𝗹𝘀 𝗜 𝘂𝘀𝗲: • JavaScript, TypeScript; • Next, React-native, React/ REDUX (THUNK, SAGA, TOOLKIT); • Node.js, Express, Nest; • PostgreSQL, MongoDB, and MySQL; • HTML, SCSS, CSS, Styled-components, Tailwind CSS, Responsive/Adaptive design; • Expert in API integration and Axios; • GraphQL, Websockets, Mongoose, Parcel, JSON Web Token (JWT), Swagger, Nginx; • AWS, Amazon S3, Google Auth0, Firebase, Keycloak, Git, PM2; • Firebase (Analytics, Cloud functions, Crashlytic, Auth, Database); • Jest, react-testing library, immutable-js; • Stripe, PayPal; 𝐎𝐡 𝐰𝐨𝐰, 𝐲𝐨𝐮'𝐫𝐞 𝐬𝐭𝐢𝐥𝐥 𝐡𝐞𝐫𝐞 𝐫𝐞𝐚𝐝𝐢𝐧𝐠 𝐚𝐧𝐝 𝐡𝐚𝐯𝐞𝐧'𝐭 𝐬𝐡𝐨𝐭 𝐦𝐞 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 𝐲𝐞𝐭? 𝐖𝐡𝐚𝐭’𝐬 𝐡𝐨𝐥𝐝𝐢𝐧𝐠 𝐲𝐨𝐮 𝐛𝐚𝐜𝐤? 😯 Alright, alright, take your time and finish reading...🧐 📲𝙋𝙧𝙤𝙛𝙚𝙨𝙨𝙞𝙤𝙣𝙖𝙡 𝙃𝙞𝙜𝙝𝙡𝙞𝙜𝙝𝙩𝙨: ⭐️Developed and launched numerous high-performance mobile applications, achieving high user ratings and positive feedback. ⭐️Extensive experience in integrating third-party APIs and services, including payment gateways, social media platforms, and analytics tools. ⭐️Proven track record of delivering projects on time and within budget, while maintaining exceptional quality. ⭐️Strong ability to troubleshoot and resolve complex technical issues, ensuring smooth and uninterrupted app performance. My expertise extends to data visualization, where I have leveraged D3.js to create dynamic and interactive graphical representations. Furthermore, I have successfully integrated various third-party services, including: ❇️Stripe – for secure payment processing and subscription management; ❇️AWS S3 – for file storage and management; ❇️Strapi & Contentful – for dynamic blog and web page content management; ❇️AWS Amplify – for automated design-to-code conversion; ❇️AWS Cognito – for authentication and authorization; ❇️Mailjet – for email distribution and campaign management; Looking forward to hearing from you! I'm ready to start 𝗔𝗦𝗔𝗣 🤝

Hey! Here you can hire a full-stack developer with 3 years of experience in web development. I’m not just a coder - I’m your technical partner in building smart, fast, and scalable web solutions. 🚀 I started my journey as a freelancer here on Upwork, driven by curiosity and a passion for creating seamless digital experiences. From responsive UIs to rock-solid backends, I bring precision and purpose to every project. 🔝 ⚙️ Tech stack I work with 🔹 Frontend: ▫️ JavaScript TypeScript ▫️ React.js React Storybook ▫️ Redux.js Redux Toolkit Redux Thunk ▫️ Next.js ▫️ Material UI Ant Design ▫️ TailwindCSS styled-components SCSS Less Sass HTML5 CSS3 ▫️ charts.js ApexCharts Highcharts Recharts ECharts ▫️ WebSockets socket.io 🔹 Backend: ▪️ Node.js Nest.js Express.js ▪️ Firebase MongoDB PostgreSQL MySQL GraphQL ▪️ Pinecone DB Neo4j ▪️ Sequelize TypeORM ▪️ Strapi Stripe Twilio SendGrid ▪️ RabbitMQ socket.io WebSockets ▪️ Auth0 JWT 🔹 DevOps & Testing: ▪️ Docker ▪️ CI/CD GitHub Actions GitLab Bitbucket ▪️ Jest Mocha 🔹 Cloud & Infrastructure: ▪️ AWS EC2 Lambda API Gateway S3 RDS Cognito Elastic Beanstalk ▪️ Algolia ElasticSearch ✅ What you get when you hire me 👉 Production-ready code – clean, scalable, and maintainable code that’s easy for future devs to work with. 👉 Pixel-perfect UI implementation - designs come to life exactly as intended - responsive, accessible, and fast. 👉 Backend that scales – from APIs to microservices, I build systems that are ready for real-world traffic. 👉 Problem-solving mindset – I don’t just build features - I solve business problems with technology. 👉 Ownership & accountability – I treat your project like it's mine. You’ll never chase me down for updates. 👉 Clear communication – you’ll always know where things stand, what’s coming next, and what I need from you. 👉 Fast turnarounds – tight deadlines don’t scare me - I deliver quickly without compromising quality. 👉 End-to-end support – from architecture to launch (and beyond), I’ve got you covered. Need a reliable developer? Send me a message, and let’s start working on your project right away. 🔥

Hi, my name is Eduard, I'm a skilled and dedicated Back-end developer with 4 years of experience in software development from concept to support and maintenance. 🐍 Proficient Python 🌟 Web framework maestro: FastAPI, Django/DRF, Flask 📌 AWS 🗨️ I bring a strong foundation of experience with various popular frameworks, enabling me to carefully select the most suitable tools for crafting high-quality user interfaces tailored to your specific requirements. My proficiency in these frameworks allows for greater flexibility and adaptability in design and development. - FastAPI, Django/DRF, Flask, SQLAlchemy, Numpy/Pandas; - SQLite, MySQL, Microsoft SQL, PostgreSQL; - NoSQL - Redis; - HTML, CSS; - Git, GitHub, GitLab; - Agile, Scrum, Kanban, Waterfall, Pair Programming; 🤝 Effective communication and teamwork is my secret weapon, and it’s essential for the success of my missions. I value knowledge-sharing and the synergy that comes from working with diverse talents. I'm a proactive problem solver and continuously seek innovative solutions to enhance work quality. Whether as part of a team or working independently, I'm dedicated to delivering exceptional results and contributing to the success of projects.

Helping founders launch high-converting web products and e-commerce solutions.🚀 WordPress, WooCommerce, Corporate Sites & SEO insights - built on 7+ years of real experience. If you’re looking for a reliable developer who delivers quality work with a fair approach to pricing - you’re in the right place. Take a moment to read more about my experience and services below. Feel free to reach out - I’m happy to offer a free consultation and help you plan the best solution for your project. ━━━━━━━━━━━━━━━━━━━━━━━ 👋 Who I Am ━━━━━━━━━━━━━━━━━━━━━━━ I’m a WordPress & E-commerce developer with 7+ years of hands-on experience. I’ve always been passionate about new technologies and finding better ways to solve problems and I bring that mindset into every project. I don’t just follow the brief I help optimize it, suggest better solutions, and make sure the final result is future-proof. ━━━━━━━━━━━━━━━━━━━━━━━ 💼 What I Do ━━━━━━━━━━━━━━━━━━━━━━━ 1. New websites from scratch: E-commerce stores, corporate websites, landing pages, custom platforms (e.g. real estate, travel agencies, portals, etc.) 2. Improvements to existing websites: Design or functional updates, UI/UX enhancements, new features, builder cleanup, better admin experience, and more. 3. Migration from outdated websites: Full migration of content, SEO structure (URLs, meta), media files — without SEO loss. 4. Performance & speed optimization: Caching, database cleanup, server config, image compression, and more for faster load times and better Core Web Vitals. 5. SEO improvements: Technical fixes, on-page SEO, structure optimization, and preparation for indexing. 6. Other capabilities include: ✓ HTML/CSS layout from Figma or other designs ✓ WordPress sites on custom themes or premium templates ✓ Builders (Elementor, WPBakery) or builder-free setups with ACF ✓ Custom PHP or Laravel development (e.g. custom CRM systems, internal tools) ✓ Full content/product population for new stores ✓ Manual and automated website testing ━━━━━━━━━━━━━━━━━━━━━━━ 🤝 Who I Work With ━━━━━━━━━━━━━━━━━━━━━━━ ✓ Business owners who need reliable, long-term support ✓ Marketing agencies outsourcing full-cycle development ✓ IT companies looking for a stable development partner ✓ Product teams who need fast and clean execution ✓ Anyone who wants quality work without hand-holding ━━━━━━━━━━━━━━━━━━━━━━━ 💡 Why Clients Choose Me ━━━━━━━━━━━━━━━━━━━━━━━ ✓ This is not a side gig - I do what I love and do it well ✓ I care about the final result, not just task completion ✓ I work in a way that makes clients want to refer me ✓ I give smart advice to improve your ideas and save you time ✓ I’m detail-oriented, reliable, and care about long-term success ✓ I communicate clearly, plan accurately, and always deliver ✓ I provide ongoing support and stick with projects for the long haul ━━━━━━━━━━━━━━━━━━━━━━━ 🛠 Tools & Tech ━━━━━━━━━━━━━━━━━━━━━━━ WordPress, WooCommerce, ACF, Elementor, Gutenberg, WPBakery, Custom Themes HTML, CSS, JS, PHP, Laravel, OpenCart, MySQL, Figma, SEO Tools, Server Optimization Docker, Git, CI/CD ChatGPT, Midjourney, Notion AI, AI Image/Copy Tools Google Analytics, Google Tag Manager, Hotjar, Clarity, Looker Studio ━━━━━━━━━━━━━━━━━━━━━━━ Want a website that works perfectly and looks great? Let’s discuss - I’ll make it easy for you.

I’m a seasoned Back-End Developer with 17+ years of experience designing and building scalable, secure, and high-performance systems. My technical journey spans from foundational web technologies to cutting-edge AI and Machine Learning solutions, allowing me to create innovative back-end architectures tailored to your unique business needs. 🔹 My Core Expertise: Back-End Development & Advanced Architecture 💻 Frameworks: Mastery of Laravel, Symfony, Flask, Django, CodeIgniter, and Express.js for robust and dynamic application development. Programming Languages: Advanced proficiency in PHP, Python, JavaScript (Node.js), and SQL. API Design & Integration: Expertise in creating RESTful and GraphQL APIs for seamless front-end and back-end communication. Microservices Architecture: Implementing scalable microservices with Docker, Kubernetes, and RabbitMQ for distributed systems. Database Engineering & Optimization 🗂️ Relational Databases: In-depth expertise with MySQL, PostgreSQL, and MariaDB for structured data handling. NoSQL Databases: MongoDB, Cassandra, and DynamoDB for high-availability, schema-less solutions. Database Optimization: Advanced query optimization, indexing, and performance tuning techniques for large-scale datasets. AI, Machine Learning & Data Engineering 🤖 AI/ML Frameworks: TensorFlow, PyTorch, Scikit-learn, and OpenCV for AI-driven solutions and predictive analytics. Data Processing: Expertise in Pandas, NumPy, and Dask for big data manipulation and analysis. Natural Language Processing (NLP): Designing chatbots, sentiment analysis models, and recommendation engines. Automation: Developing intelligent workflows with Celery, Apache Airflow, and Zapier integrations. Security & Scalability 🚀 Security Practices: Implementing OWASP standards, encryption protocols, and secure authentication methods (OAuth2, JWT). Performance Scaling: Load balancing with Nginx, HAProxy, and horizontal scaling techniques to handle millions of users. Caching Mechanisms: Using Redis, Memcached, and Varnish for performance enhancements. Cloud Infrastructure & DevOps 🛠️ Cloud Platforms: Extensive experience with AWS (EC2, Lambda, S3, RDS), Google Cloud, and Azure for hosting and deployment. Containerization: Advanced knowledge of Docker and Kubernetes for containerized application management. CI/CD Pipelines: Automating workflows with Jenkins, GitHub Actions, CircleCI, and Bitbucket Pipelines. Infrastructure as Code: Expertise in Terraform and Ansible for managing infrastructure efficiently. Collaboration & Agile Development 📋 Version Control: Proficient with Git, GitHub, GitLab, and Bitbucket for collaborative coding. Agile Methodologies: Leading and participating in SCRUM, Kanban, and iterative development cycles. Team Leadership: Mentoring junior developers, conducting code reviews, and fostering a collaborative work environment. 🔹 Technologies I’ve Mastered Over the Years: Languages: PHP, Python, JavaScript, Java, Ruby Frameworks: Laravel, Symfony, Django, Flask, CodeIgniter, Express.js, Vue, Angular AI/ML Tools: TensorFlow, PyTorch, Scikit-learn, OpenCV, Pandas, NumPy Databases: MySQL, PostgreSQL, MongoDB, Cassandra, DynamoDB, MariaDB DevOps Tools: Docker, Kubernetes, Jenkins, Terraform, Ansible Cloud: AWS, Google Cloud, Microsoft Azure, DigitalOcean Security: OWASP, SSL/TLS, OAuth2, JWT 🔹 Why Choose Me? ✅ 17 Years of Proven Success: A track record of delivering scalable and efficient back-end systems. ✅ AI & ML Expertise: Leveraging data to deliver innovative, intelligent solutions. ✅ Secure & Scalable Architectures: Building systems designed for reliability and growth. ✅ Transparent Collaboration: Clear communication and consistent updates throughout the project lifecycle. Let’s build something extraordinary together powerful, intelligent, and ready for the future. 🚀

Hello! I’m a Senior Frontend Developer (React / Next.js / TypeScript) ❗ I’m available to start immediately! 📞 A short intro call helps us align from day one. 📆 I’m looking for a long-term, high-impact collaboration! With over 7 years of experience in frontend development, I specialize in creating fast, responsive, and accessible user interfaces using modern JavaScript frameworks like React and Next.js. I bridge the gap between design and code, transforming concepts into engaging digital experiences. 🚀 Why Work With Me as Your Frontend Developer? As your dedicated frontend developer, I bring: ✅ Pixel-perfect Implementation - I translate Figma or Adobe XD designs into real UI with precision. ✅ Strong Component Architecture - Code that's clean, reusable, and easy to maintain. ✅ Focus on UX - Smooth animations, responsive layouts, and seamless user interactions. ✅ Scalable & Performant Apps - Optimized for speed, SEO, and mobile. ✅ Collaborative Approach - I work closely with backend, design, and product teams. Whether you need a landing page, e-commerce frontend, or a complex web platform - I can help you build it from the ground up or join mid-project and accelerate progress. 🌟 Project Experience as a Frontend Developer: 🎮 Real-time gaming dashboards and interactive platforms 🛒 Headless eCommerce storefronts 📊 Admin dashboards with complex data visualization 🧬 Medical and healthcare web apps 📚 Education & LMS platforms 🏠 Real estate listings with map integrations 🏆 Career Highlights: 🎯 Built 30+ high-quality frontend apps using React/Next.js 🚀 Helped scale startup platforms from MVP to production 🎥 Developed animation-rich UIs for SaaS & entertainment 🛠️ Refactored legacy codebases to modern React stack 💡 Mentored junior developers and collaborated in agile teams 🧠 Technologies I Work With: 🖥️ Frontend Stack: React.js, Next.js, TypeScript, JavaScript (ES6+), Redux, Zustand, Tailwind CSS, Bootstrap, SCSS, HTML5, CSS3 🌍 Web Tools: Vite, Webpack, Storybook, Framer Motion, i18next (multilanguage), Formik, React Hook Form, AG Grid, Chart.js 📦 Integrations & APIs: REST APIs, GraphQL, Stripe, Firebase, Supabase, Sanity.io, Contentful 🧪 Testing & CI: Jest, React Testing Library, Playwright, GitHub Actions, Netlify, Vercel 💡 If you’re looking for a Frontend Developer who delivers clean code, beautiful UI, and real business results - let’s connect. 📩 Drop me a message and let’s talk about your project today!

I've been using PHP for over 6 years to create fast, reliable digital solutions. Here are some projects I've worked on: I built an analytics platform for educational sphere to gather and analyze course information. I developed a custom CRM system for managing employees' vacations and automating emails. Here's what I'm good at and can help you with: -Building the server-side of apps -Developing features from start to finish -Designing application architecture -Integrating third-party services -Improving app performance and scalability -Writing unit tests for better user experience I value quality and transparency, using best coding practices and project management tools like Trello and Jira. If you need a skilled backend developer for your project, feel free to message me!

I'm Artem from Koitechs - I can help provide in-house AI-driven React developer, full stack Next js developer, and full-stack React developer (React.js, Next.js, Node.js) who join your team seamlessly. Our team of React developer has experience across 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, Next developer, and Supabase expert. Our React developers are not freelancers - every web developer is an in-house, CTO-approved specialist. Depending on the demands of your project, 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. Our core stack React Native instead of flutter for mobile app developer full stack developer 🛠 Skills & Tech React developer React web development / 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, Wordpress, 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 developers: 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 react , react developer , next js , wordpress , vue , angular front end for SaaS, front end for e-commerce, dashboard, AI-first developer, AI MVP Whether you need a single Python 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 , front end next js expert 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