Sergey H.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 highly-detailed Software Quality Engineer, with over 6+ years of hands-on experience testing web, mobile, and desktop applications. I've been a game Tester for over 1 year. I also have experience as a QA team lead. I'm very passionate about testing, finding solutions, and helping companies like YOURS create rock-solid, reliable digital products free of bugs 🐞🐞🐞, and meeting compliance. 🐞As a Software Quality Engineer, I have been working on long-term projects as well as on small assignments. I have experience in testing web applications (Travel, Streaming, Healthcare, E-commerce, Fintech) projects mobile applications (iOS, Android, Unity, Flutter), and desktop apps. I have experience managing a QA team. Developed development plans, built processes from scratch, conducted interviews 🐞My set of tools for testing: Web Testing: Chrome dev tools, Browserstack, ZAP, Web extensions Back-end Database & API Testing: Postman, Jmeter, Swagger, Kreya, SQL Load & Performance Testing: JMeter Mobile Testing: Android Studio, Xcode, Testflight, Firebase, Charles proxy, ProxyMan Automation testing: JS+Cypress Game testing: Unity, UE5 Project Management and Defect Tracking Tools: Jira, Trello, Notion, TestRail, Qase Test documentation: Checklist, Test cases (BDD), Test plan 
 Programming Languages/Technologies: JS basic knowledge, HTML, CSS Methodologies: Agile, Scrum Development Tools: Visual Studio, GIT Operating Systems: MacOS, Ubuntu Linux, Windows Real Mobile devices: Android, iPhone 🐞I can do for you: * Web apps and software testing; * Mobile apps testing; * Black-box/white-box testing; * Functional testing; * Performance testing; * Usability testing; * Regression testing; * Integration testing; * Cross-browsing testing; * API automation testing; * Test Planning/ Test strategies/ Test cases/ Test suites/ Test reports; * Using different approaches for testing your product. 🐞So, how can I help you?