I am a Senior Frontend Developer with strong experience building scalable, high-performance web applications using Angular (including Spartacus), React, and Next.js. I specialize in creating clean, responsive, and user-focused interfaces for SaaS and enterprise platforms. I work closely with designers, backend teams, and product owners to translate complex requirements into maintainable, production-ready frontends, with a strong focus on performance, accessibility, and usability.

🔥I'm Full-Stack Developer experience in Software Development. (Back-End & Front-End )⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ 🖥Hi, I congratulate you on finally finding the right person to realize your dream. I've done many projects and love to see a small idea grow into a large-scale business. I have a commercial background as a professional full-stack developer who is thoroughly familiar with React Next.js Node.js Nest.js ⚡️ Proficient in React.js, Next.js, Redux, and TypeScript, I specialize in diverse UI development using tailwindcss/Bootstrap/Material-UI, Restful API, GraphQL, and 3D visualization. I have extensive experience integrating third-party APIs like Stripe, Twilio, and Google Maps. ⚡️ My expertise extends to backend development, where I utilize the Mongoose ODM library for MongoDB and work with SQL, including writing aggregate functions. I am skilled in Node.js, Nest.js, and Express, incorporating libraries such as JWT, FS, Nodemailer, Socket.IO, Mongoose, Sequelize, cors, etc. 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞: 💰Finance. 🏥Healthcare. 🛒E-commerce 🚚Logistics and Transportation 📚Education 🚨Public safety. 💡Frontend Skills: Proficient in ReactJS, Next.js, and TypeScript, I create dynamic and responsive user interfaces. I leverage Next.js features for enhanced web application performance. Adept with Redux, I manage state effectively, and my understanding of GraphQL enables efficient API design. ▪️ In styling and design, I excel in HTML5, CSS3, SCSS, tailwindcss .Bootstrap, and Material-UI, utilizing Webpack for bundling and optimizing frontend assets. 💡Backend skills: In backend development, I use Node.js to build scalable server-side applications. Familiar with MongoDB and SQL, I ensure flexible data storage and manage relational databases for data integrity. Using Nest.js, I create high-quality applications with efficient architecture and fast API routing. ▪️ Competent in Express, I build RESTful APIs that seamlessly integrate with frontend applications. Proficient in JWT, I ensure secure authentication, and my experience with Socket.IO enables real-time communication. ▪️ Additionally, I am competent in PostgreSQL and have knowledge of Amazon Web Services (DynamoDB, S3, EC2) for scalable and reliable cloud solutions. ▪️ I can help you with integration with ChatGPT in real time, or implement advanced features using OpenAI services. 💡Mobile App Development: Expertise in React Native for cross-platform mobile development, covering Android and iOS. Proficient in Expo and React Native CLI, I have experience with App Center, Firebase Distribution, and TestFlight for streamlined app deployment and testing. 💡 𝐎𝐭𝐡𝐞𝐫 𝐒𝐤𝐢𝐥𝐥𝐬: Diverse skill set includes integrating location-based services with Google Maps and MapBox, communication services with Twilio, and real-time communication through WebRTC. I also have experience with email services like SendGrid. I also leverage the power of ExpressJS to deliver high-performance web applications. My expertise in web development interacts with the expressive power of ExpressJS to deliver reliable and efficient server-side solutions 💡 𝐒𝐮𝐦𝐦𝐚𝐫𝐲: With a comprehensive skill set in frontend and backend technologies, mobile development, and service integration, I offer end-to-end solutions. I excel in large team environments and client interactions, committed to transforming ideas into successful projects. Keywords🔑 Front-End Development, Website, Responsive Design, ReactJS, Next.JS, TypeScript, HTML5, CSS3, SCSS, SASS, Bootstrap, Material-UI, Webpack, Ant Design, Angular2+, JavaScript, Tailwind CSS, GraphQL, Redux, React Bootstrap, Website Redesign, Web Application, Ecommerce Website, Browser Extension, Figma, Performance Optimization, UX/UI Design, Back-End Development, Mobile App Development, MERN stack, MongoDB, Express.js, React.js, Node.js, Nest.js, Next.js, React Native[IOS,Android], API design, SQL, PostgreSQL, Amazon Web Services, DynamoDB, S3, EC2, Expo, App Center, Firebase Distribution, TestFlight, RESTful APIs, cloud platforms, AWS, Azure, Websockets, Charts, 3D visualization, Third-party APIs, Stripe, Twilio, Google Maps, Socket.IO, Design Expertise, Software Development, Android App Development, Native App Development, iOS Development, GraphQL, MapBox, Core Bluetooth, HealthKit, CloudKit, GameplayKit, Firebase Realtime Database, Redis, Firebase Cloud Firestore, SQLite, Smartphone, Tablet, SendGrid, REST API, ExpressJS, Material Design, App Store, Google Play Store, Push Notifications, JSON, Mobile SDK, Mobile Payments, Security, Data Privacy, Offline Support, Machine Learning, Deep Learning, Natural Language Processing, NLP, Computer Vision, Robotics, Algorithms, Data Analysis, Big Data Processing

Sergey at your disposal . I am a full stack developer with deep understanding in JavaScript , TypeScript , Java and PHP languages and take pride in my knowledge of the following technologies : 💻 𝐑𝐞𝐚𝐜𝐭 , 𝐍𝐞𝐱𝐭𝐉𝐒 , 𝐕𝐮𝐞 , 𝐍𝐮𝐱𝐭𝐉𝐒 , 𝐀𝐧𝐠𝐮𝐥𝐚𝐫 🔄 𝐑𝐞𝐝𝐮𝐱 , 𝐂𝐨𝐧𝐭𝐞𝐱𝐭 𝐀𝐏𝐈 , 𝐅𝐥𝐮𝐱 , 𝐙𝐮𝐬𝐭𝐚𝐧𝐝 🖥️ 𝐍𝐨𝐝𝐞 , 𝐄𝐱𝐩𝐫𝐞𝐬𝐬 , 𝐍𝐞𝐬𝐭 🐘 𝐏𝐇𝐏 , 𝐋𝐚𝐫𝐚𝐯𝐞𝐥 , 𝐒𝐲𝐦𝐟𝐨𝐧𝐲 🗄️ 𝐏𝐨𝐬𝐭𝐠𝐫𝐞𝐒𝐐𝐋 , 𝐌𝐨𝐧𝐠𝐨𝐃𝐁 , 𝐌𝐲𝐒𝐐𝐋 🧠 𝐇𝐞𝐚𝐝𝐥𝐞𝐬𝐬 𝐂𝐌𝐒 - 𝐒𝐚𝐧𝐢𝐭𝐲 , 𝐒𝐭𝐫𝐚𝐩𝐢 , 𝐂𝐨𝐧𝐭𝐞𝐧𝐭𝐟𝐮𝐥 ☕ 𝐉𝐚𝐯𝐚 , 𝐇𝐢𝐛𝐞𝐫𝐧𝐚𝐭𝐞 ☁️ 𝐀𝐖𝐒 , 𝐒𝟑 𝐁𝐮𝐜𝐤𝐞𝐭𝐬 , 𝐄𝐂𝟐 , 𝐀𝐳𝐮𝐫𝐞 , 𝐅𝐢𝐫𝐞𝐛𝐚𝐬𝐞 🔗 𝐆𝐫𝐚𝐩𝐡𝐐𝐋 , 𝐀𝐩𝐨𝐥𝐥𝐨 𝐂𝐥𝐢𝐞𝐧𝐭 If you're looking for quick deliverables and high quality code sources , shoot your shot . Message me RIGHT NOW for discussions and lets get this started . I am impatient to discuss your project details

Hi! I’m a senior Laravel/ WordPress/WooCommerce/Shopify Developer. I have more than 5 years of experience in: - Front-end/Backend Development using PHP/MySQL, HTML/CSS, Javascript/JQuery. - Wordpress/woocommerce Plugin Development - Customising core wordpress, plugins using hooks - WooCommerce Payment/Shipment Gateways - Theme customisation - Website Development and performance optimisation - Server migration, linux servers, webs servers, wp engine Skills: Wordpress, PHP, MySQL, WooCommerce, Domain Migration, Cpanel, WHW, Wordpress sites migration, Linux System Administration, JavaScript, React and NEXT js What I Can Do for You ✔ Automate repetitive tasks, saving time and money ✔ Create beautiful, fast, and functional websites ✔ Develop membership sites with seamless user experiences ✔ Integrate systems for a unified workflow If you’re looking for a reliable, detail-oriented expert to streamline your business processes and enhance your online presence, let’s connect and discuss your project today!

Senior Vue.js and JavaScript developer with 10+ years of experience building, refactoring, and scaling frontend applications using Vue, Nuxt, React, Angular, and TypeScript. I specialize in frontend architecture, design systems, and legacy codebase refactoring for startups and product-driven teams. A large part of my work involves taking ownership of existing codebases, improving structure and performance, and helping teams move faster without accumulating technical debt. I’ve worked with distributed teams across the US and Europe on SaaS, fintech, and data-driven products — contributing to component libraries, migrating large Vue applications to Nuxt, stabilizing Angular and React systems, and mentoring developers on best practices. What clients typically hire me for: - Refactoring and modernizing legacy frontend codebases - Designing and maintaining scalable design systems and component libraries - Frontend architecture decisions in startups and enterprise - Vue 3 / Nuxt / React / Angular development with TypeScript - Long-term product engineering and technical ownership Core Technology Stack Frontend: JavaScript, TypeScript, Vue 2/3, Nuxt.js, React, Angular, Pinia / Vuex
 Backend: Node.js, REST APIs, Stream API’s , WebSockets
Styling: HTML5, CSS3, SASS, Tailwind CSS, Bootstrap, Shadcn , Lottie-js 
 Product & Analytics: Mixpanel, 
AI Tooling: Cursor, Claude code, AI Agents, Copilot, N8N
 Workflow: Git (GitHub, GitLab, Bitbucket), Jira, Trello, Notion, Agile/Scrum Why clients work with me: - I take ownership of existing systems and improve them, not just add features - I’ve been refactoring and stabilizing legacy frontend codebases since 2015 - I communicate clearly with founders, designers, and engineers - I focus on maintainability, performance, and long-term scalability I’m flexible with time zones, comfortable working with distributed teams, and happy to take responsibility beyond my immediate scope — especially in startup environments where impact and adaptability matter.


For the last 12 years I and my team learned all technologies which can be useful for huge projects and we have a passion to create products better than expected. Website development is one of our main areas of expertise. All other experience you can see in specialized profiles here on Upwork. Our expertise: Front-end development • Developing valid cross browser markup html/css from design layout in psd; • Developing scripts js/jQuery/Vue/Angular/React, enhancing and adopting existing solution. Back-end development • Creating website's back-end using PHP with WordPress, Elementor, Laravel Framework, Symfony Framework, Node.js. • Integration of third party APIs like Google Maps, PayPal, Amazon, REST etc. • Synchronization for different databases for CRM Systems, Accounting Automation Systems etc. If you have hard for implementation tasks and some doubts about its realization - feel free to get in touch with me. I'll make the project live in most quality way according to all latest trends

Full Stack & GenAI Engineer | AI Integrations | JavaScript | Typescript | React | Next | Node | MVP | Startup ⭐️ Top Rated Plus - Top 1% of talent on Upwork ✅ 9+ years in Development ✅ 70+ Projects delivered ✅ 100% Customer Satisfaction ✅ 100% Job Success Rate ✅ Expert in MVP development for start-ups & SMEs. ✅ My portfolio start-ups have scaled MVPs and got into funding rounds with Y Combinator, TechStar. As a Full Stack Developer, I possess a proven track record of designing and developing customized software solutions. With my extensive experience in software development across different regions, I have acquired a comprehensive knowledge of web and mobile application development and operations. I have been actively working in the IT industry for over 7 years and have worked on several enterprise projects. Being a tech-agnostic professional, I believe that communication is the key to achieving customer success and retention. I am proficient in every aspect of the development cycle, from discovery and requirement gathering to planning, development, deployment, and maintenance. I am available to support you round the clock to transform your idea into a scalable product. Additionally, I have excellent comprehension skills that enable me to fix bugs, refactor poorly written code, or add new features to your existing app with ease. I’ve served over 50 startups bridging multiple industries: 🔸Health & Fitness 🔸Edtech 🔸E-Commerce 🔸Delivery 🔸Retail 🔸Real Estate 🔸Fintech 🔸Audio 🔸Law and Logistics 🔸E-Gaming 🔸Saloon and SPA My main skills are: Front-end: 🔸JavaScript/TypeScript (React.js, React Native, Redux, Next, Toolkit, Next.js, Apollo Client) 🔸HTML5, CSS3, SCSS 🔸Bootstrap, MaterialUI Back-end: 🔸Node.js, Express, NestJS 🔸Apollo Server, GraphQl-Ws 🔸MySQL, PostgreSQL, 🔸MongoDB 🔸AWS Amplify, AWS Lambda Tools: 🔸Git, npm, yarn 🔸Figma, Slack, Jira, etc. 🔸Prism Framework, Bitbucket 🔸Azure DevOps, Jest, Mocha, Enzyme It's important to me to build long-term relationships with clients, so I'm always trying to give my best to clients and looking for long-term projects. I love my work and always try to follow the best practices. I can assure you of maximum availability and error-free semantic code. Let's get on the ride to your best product/project.

5 years deep in this software jungle. Found trash, found diamonds, broke backends, cooked UIs, crashed infra, fought bugs at 3AM, took heat from managers, fixed mess nobody wanted to touch. Played with AI before it became everyone’s personality. II’ve built websites, mobile apps, dashboards, SaaS platforms, AI tools, admin panels, payment flows, auth systems, APIs, databases, servers, deployments, and those “just one small change” requests that somehow turn into a whole new module. Not the cleanest engineer in the room, but I ship, I learn, I survive production, and I know how to turn chaos into something that actually works. I work across frontend, backend, APIs, databases, deployments, performance, automation, and production fixes. I think about how the product will actually work when users start clicking, breaking, refreshing, uploading, paying, logging in, logging out, and doing all the things nobody tested. That’s where I’m useful. I keep communication simple, reply quickly, explain things clearly, give honest advice, and take full ownership. No disappearing. No fake “yes sir everything possible.” No building something wrong just to make the moment easy. Hire me before the cheap shortcut becomes an expensive rebuild. I’m available for a call anytime even now if you’d like to discuss the project. Let’s cook.

🚀 15+ Years Full Stack Developer | Clients: NASA, Amazon, Google, MongoDB, Deloitte, Neom 💡 Full Stack Developer expert in Web, Mobile, Blockchain, Serverless, and Cloud (AWS, Azure, Google Cloud) solutions 📱 React | React Native | Flutter | Node.js | Python | TypeScript | K8S | DeFi | NFTs – versatile Full Stack Developer toolkit 🌐 Full Stack Developer ready for any scale – from small fixes or MVPs to complex enterprise apps ✅ Flexible engagement models: hourly, fixed-price, team scaling, full-cycle delivery – adaptable Full Stack Developer services 🙋‍♂️ Full Stack Developer able to build or scale teams whenever your project demands success With over 15 years of experience as a Full Stack Developer, I’ve launched and scaled high-performance web and mobile products across fintech, blockchain, aerospace, e-commerce, and healthcare. My extensive track record as a Full Stack Developer for global brands and ambitious startups guarantees cutting-edge, reliable solutions delivered efficiently. Recent Case Studies • Fintech Wallet “Trastra”: crypto and fiat wallet with 300 000+ users, crafted with Full Stack Developer precision. • Farm Management App “Herdwatch”: trusted by 50 000 agribusinesses, engineered through a Full Stack Developer approach. • Marketplace “Bidsheet”: wholesale electronics auctions serving hundreds of thousands, architected by a Full Stack Developer mindset. Technical Skills & Specializations As a Full Stack Developer I unite frontend and backend expertise for seamless products: • Frontend: React, React Native, Flutter, TypeScript, HTML5, CSS3 • Backend: Node.js (Express.js), Python (Django, Flask), GraphQL, RESTful APIs • Blockchain & Crypto: Ethereum, Solidity, Smart Contracts, DeFi, NFTs • Cloud & DevOps: AWS, Azure, Google Cloud, Serverless (Lambda, Functions), Docker, Kubernetes, CI/CD • Databases: MongoDB, PostgreSQL, MySQL, design & optimization • Security & Compliance: PCI DSS, secure coding, infrastructure audits • Architecture: Microservices, performance, scalability, reliability Collaboration Options • Short-term projects: prototypes, quick fixes, new features, audits • Long-term engagements: continuous product evolution • Full-cycle development: requirements to maintenance • Flexible pricing: hourly or fixed-price, whatever fits • Team scaling: rapid assembly of specialists led by a Full Stack Developer My Commitment I am a Full Stack Developer dedicated to clear communication, transparency, and tangible business outcomes. Expect high-quality, maintainable, secure code with user-centric design and robust functionality. Fluent in English, I collaborate smoothly with teams worldwide. Let’s connect and discuss how this Full Stack Developer can turn your vision into reality!

Hi! I'm Mahmoud Elmaandi, a Full Stack Developer with expertise in Node.js, PostgreSQL, and web automation. I specialize in building scalable web applications, browser extensions, and cloud-based solutions. My experience spans across backend development, API integrations, and performance optimization, ensuring high-quality and efficient solutions. 🔹 Key Skills & Expertise: Backend: Node.js, Express, PostgreSQL, MongoDB, .NET (beginner) Frontend: Angular (basic), TypeScript, HTML, CSS DevOps: Docker, Webpack, Nginx, CI/CD, SSL Certificates Other: Chrome Extensions, Web Scraping, AI-driven Data Analysis 🔹 Notable Projects: ShowZone Connect – A Chrome extension enhancing analytics for MLB The Show gamers. TakaLaw Chrome Extension – A legal assistant tool for lawyers, integrated with a web app. Smart Strategy System – A strategy management platform enabling organizations to track goals, initiatives, and KPIs efficiently. Electronic Auction System – AI-powered bidding platform for a government entity. I'm always eager to collaborate on challenging projects that require innovative thinking and technical expertise. If you need a reliable developer to build or enhance your platform, let’s connect!