Kevin R.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 Nov 7, 2026.

Senior Full-Stack Developer & Architect | $500K+ Earned on Upwork | 10+ Years Building Scalable Applications If you’re looking for a complete developer who can turn complex ideas into reliable, production-ready software, you’re in the right place. I'm a solution-driven individual. I love to help clients solve their most difficult problems, and bring their ideas to life. I deliver and architect high-performance Applications, APIs, eCommerce, AI-Driven Solutions used by businesses around the world. I’ve earned over $500K on Upwork, delivering projects that are scalable, fast, maintainable, and built to last. Clients work with me because I focus on solving business problems, not just writing code. Why you should hire me: -$500k+ earned on Upwork -Proven record of long-term client relationships -Strong problem-solving and architecture skills -Clear communication and reliable delivery -Experience across multiple industries and complex systems Whether you need a new app built from scratch, help to scale an existing application, or a developer who can jump into a complex codebase and deliver results efficiently, I’m ready to move fast. My services: -Architect applications end to end -Build robust backend systems using C#, Node.js / Next.js and ASP.NET Core -Develop modern, responsive frontends using React, Angular, and TypeScript -Create scalable APIs and real-time systems using SignalR and WebSockets -Develop cross-platform mobile apps with .NET MAUI for iOS and Android -Optimize and design databases using MSSQL, MySQL, or MongoDB -Automate testing and ensure quality with NUnit, Selenium, and Cypress -Build and customize eCommerce platforms such as BigCommerce, Shopify, and Volusion -Develop Cloud Based solutions using Azure or AWS -Migrate legacy apps to modern, fast, and robust technologies -AI Assisted Development using Claude and Codex Feel free to reach out to me for project discussion!