Oleksandr 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 5, 2026.

I'm a member of Toptal network - a community of world's best 3% of freelancers. I have 9 years of commercial programming experience, including 6 years on Android platform (Java + Kotlin). These included using of concurrency, web services, databases, version control systems such as SVN and Mercurial, web front-end technologies (Phonegap). I'm familiar with Material Design. I've been working on many big projects in Android, including: 1) Magisto - multimedia project, extensive work with UI, social media integration, parallelism 2) Mixer - video streaming, chat 3) Intapp Time - dealt with sqlite database, JSON, custom UI views, Material Design. 4) Aon Dashboard (not listed in Play Store yet) - not so big app as previous two, but it was the first project I did on my own. The whole app was implemented using Material Design guidelines. 5) A phonegap app - using HTML, CSS, JavaScript (which is obvious), 3rd-party JS libraries, Media plugins. ... and many more (almost 20 in total - just in Android) I'm an experienced user of version control systems, such as Git, SVN and Mercurial, both from GUI and Command Line. Also I have a smaller experience in JavaEE. Technologies used: Spring, Servlets, JPA, PostgreSQL, front-end development. I'm familiar with software design patterns, have strong understanding of OOP.