Oleg M.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Oct 14, 2026.

Looking to build scalable, user-focused web and mobile applications for your Real Estate, Healthcare, or FinTech business? I'm here to deliver cross-platform mobile apps and responsive web solutions tailored to your needs. Drop me a message to discuss your project and book a consultation! With over 12 years of software development experience, including 7 years specializing in full-stack development, web development, and mobile app development, I bring a comprehensive skill set and an open perspective to every project. My expertise in React Native, TypeScript, and Node.js ensures scalable applications with clean code and optimal performance. My Technical Expertise Includes: ✅ Front-end Development: JavaScript, TypeScript, React, React Native, Angular, React Hooks, Redux, Material-UI, Ant Design, HTML5, CSS3, SASS/SCSS, Bootstrap, and responsive web design. ✅ Mobile Development: Cross-platform mobile apps using React Native CLI, Expo, React Navigation, push notifications, and App Store/Google Play deployment. ✅ Back-end Development: Node.js (Express, Nest.js, Koa), RESTful APIs, GraphQL, WebSockets, socket.io, and server-side rendering. ✅ Databases: PostgreSQL, MySQL, MongoDB, Redis, Firebase, Cloud Firestore, Supabase, Prisma, and TypeORM. ✅ Cloud & DevOps: AWS, Google Cloud Platform, Firebase, Supabase, Docker, serverless architecture, and CI/CD pipelines. ✅ Tools & Practices: Git, GitHub, NPM, Yarn, Webpack, Vite, Jest, Cypress, unit testing, integration testing, Agile development, and version control. ✅ AI integrations: LangChain, MCP Servers, LLaMA, OpenAI ChatGPT, Claude. ✅ Automation: n8n, make.com (Integromat). Worked With: ✔ Third-party APIs & Services: Google Maps API, Stripe API, Mailchimp, Cloudinary, Mixpanel, D3, and more. ✔ Industries: E-commerce, FinTech, Healthcare, EdTech, real-time applications, and SaaS development. Why Work With Me? As a reliable, goal-driven developer, I thrive in deadline-driven environments and deliver high-quality, type-safe solutions. My focus on client communication, problem-solving, and code optimization ensures your project is completed on time and exceeds expectations. I’m adept at team collaboration, technical documentation, and project management, making me a valuable partner for your scalable applications. ✅ Let’s build feature-rich, performance-optimized web and mobile solutions together! Message me to discuss how I can elevate your project with my full-stack development expertise.