Filonenko I.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 Sep 25, 2026.

Certified Radency Engineering Accelerator graduate with proven expertise across the full stack, including C#, ASP.NET Core, Entity Framework Core, PostgreSQL, and modern frontend technologies. Adept at designing and implementing scalable APIs, robust backend systems, and user-facing features that deliver reliable performance and long-term maintainability. Experienced in translating business requirements into clean, well-structured solutions that teams can easily extend. Skilled at optimizing database design, improving system reliability, and integrating frontend and backend components into cohesive products. Recognized as a dependable teammate who brings both technical rigor and a collaborative mindset. Passionate about driving projects forward, ensuring code quality, and contributing to solutions that create tangible business impact.