Mark G.

Senior Full Stack Developer with 5+ years of professional experience building production web, mobile, and backend applications. I specialize in React, React Native, and Node.js, helping startups and businesses turn ideas into scalable, production-ready software. For the past two years, I've worked as a Senior Full Stack Developer on a healthcare physical therapy platform with a React web portal, Express.js backend, and React Native mobile app featuring camera-based exercise tracking, real-time messaging, and other functionality. I've also built a healthcare data portal for an Upwork Enterprise client, an educational collaborative whiteboard application with built-in messaging and video calling, and many other client software applications. JavaScript/TypeScript, React/Next.js, React Native, and Node.js are my core technologies, but I've also built backend systems with Python and PHP, desktop applications with Electron, and worked with production applications deployed to AWS, Azure, Vercel, and DigitalOcean. Here's what I bring to the table: ⭐ Top Rated Plus – 100% Job Success Score with a history of successful, long-term client relationships. 🚀 End-to-End Product Development – I build complete web and mobile applications from frontend to backend, database, deployment, and production support. 📱 React & React Native Expertise – Strong experience developing production applications with React, React Native, Redux, Zustand, Next.js, Express, and Typescript. 🔗 API & Backend Development – Design and build REST APIs, authentication systems, real-time applications, and integrations with third-party services. 🎨 Clean, Responsive UI – Build fast, responsive, pixel-perfect interfaces using Material UI, Tailwind CSS, HTML, CSS, and modern frontend best practices. 🤝 Communication & Reliability – Clients appreciate clear communication, realistic timelines, and clean, maintainable code that other developers can easily work with. My Work Approach: I believe great software comes from clear communication, realistic expectations, and clean, maintainable code. I keep clients updated throughout development, ask questions early to avoid surprises, and focus on delivering solutions that are reliable, scalable, and easy to maintain. Skills: ✔️ Frontend: React, React Native, Next.js, JavaScript, TypeScript, HTML, CSS, Material UI (MUI), Tailwind, Electron, WordPress ✔️ Backend: Node.js, Express, Python (Flask), PHP (Laravel), Socket io, REST APIs, OAuth, Azure AD ✔️ Databases: MySQL, MongoDB, SQL Server, DynamoDB, Supabase/PostgreSQL ✔️ Cloud & DevOps: AWS, Azure, DigitalOcean, GitHub Actions If you're looking for a developer who communicates well, writes clean code, and takes ownership of projects, I'd love to discuss how I can help!