Owned QA for full game lifecycle (requirements >production) for slot, crash and casino games
Ensured quality of complex game logic and high-load transactional flows
Led integration testing with external providers via APIs
Mentored QA engineer and collaborated with AutomationQA on test execution and debugging

Led QA for CRM platform (traffic arbitrage) end-to-end
Tested multiple domains: CRM, iOS taxi app, sportsbook,casino, crypto wallet
Owned testing of payment systems and betting flows withintegrations
API/UI/backend testing (Postman, Swagger, DBeaver)
Mentored 2 QA interns (growth to Junior level)

Tested enterprise systems: corporate directory & projects management platform
API testing (Postman, Swagger) + DB validation (MS SQLServer)
Verified system integrations via BizTalk (data flows, DTOs)
Worked in Scrum team, maintained QA documentation(Jira, Confluence)

Tested blockchain ecosystem (wallet, exchange,marketplace, bridge)
End-to-end validation of crypto transactions and crosschain flows
API/UI testing (Postman, Swagger, Figma) + DB checks(DBeaver)
Log analysis (Grafana, Kubernetes) + QA documentation(Jira, Confluence)