Jakub K.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 5, 2026.

I'm developer with over 10 years of experience in IT. I like ambitious projects and working with creative people. In my everyday work I deal with very large systems and databases (for example distributed system of 450 departments with hierarchical data replication). I have experience in every phase of IT system life cycle starting from analysis through development and implementation ending with deployment and maintenance. My skills: Networking (CCNA, CCNA Security) Servers Administration (Windows / Linux) Developer (C#, Java, Android, PowerBuilder) Databases (Oracle, Sybase, PostgreSQL, MS SQL) Analyzing and modeling IT systems