Project: E-Commerce Application – a platform streamlining business operations. ● Executed functional, regression, integration, and acceptance testing for web applications, covering 110+ test cases per release, improving pre-release defect detection by ~35%. ● Tested REST APIs using Postman and validated backend data with PostgreSQL, detecting critical API issues in multiple sprints. ● Decomposed product requirements into detailed test cases, ensuring full coverage of business workflows and edge scenarios. ● Designed Gherkin-based acceptance test scenarios for clear communication between QA, developers, and product owners. ● Participated in sprint planning and backlog refinement, introducing shift-left testing practices to catch defects earlier. ● Investigated production issues using logs and SQL queries, reducing incident resolution time by 17%. ● Maintained and updated test documentation in TestRail, improving traceability and onboarding. Results: ● Reduced regression defects by ~35%. ● Detected critical API issues before release in 3 consecutive sprints.

Project: Web Gaming Platform – online entertainment solutions. ● Built manual QA processes from scratch and established a QA team, defining full testing and quality control workflows. ● Monitored deadlines and allocated workload, improving team efficiency by 15%. ● Conducted retrospectives and analyzed team output, proposing process improvements that increased defect detection at stage vs production. ● Trained three QA Engineers through a structured onboarding program, achieving successful probation completion within 3 months. ● Executed full regression cycles before each release (70–90 test cases per run). ● Performed backend testing via Postman and Swagger, validating analytics and event pipelines. ● Ensured data consistency using PostgreSQL (DBeaver). ● Analyzed WebSocket traffic and application logs. ● Designed security test cases (SQL Injection, XSS). ● Maintained workflows and created internal instructions to accelerate onboarding. ● Validated analytics and event tracking in PostHog, ensuring recorded events matched actual user actions. ● Conducted load testing with Apache JMeter, identifying performance bottlenecks and reducing response time by up to 18%. ● Tested Web Apps for Telegram Mini Apps across devices. ● Participated in CI/CD automation runs with Playwright, reviewing results and improving regression coverage by ~20%. Results: ● Improved release stability and reduced hotfixes by ~27%. ● Increased defect detection at Stage vs Production.

Project: Trading & Analytics Platform – stock and cryptocurrency exchange tools. ● Conducted functional, regression, and smoke testing of a desktop trading application, covering 100+ test cases per release. ● Created and maintained test documentation in TestRail, improving onboarding speed. ● Compiled bug reports and tracked lifecycles in Jira, ensuring 95% of critical issues resolved before release. ● Analyzed trading strategies and user configurations to improve UX and workflow efficiency. ● Monitored system requests and logs via Kibana, preventing downtime. ● Verified UI compliance with Figma mockups. ● Collaborated with analysts, developers, and managers to prioritize defects. ● Supported the customer support team, reproducing and analyzing incidents, achieving 30% faster resolution. ● Analyzed network traffic using Fiddler, resolving data transmission issues. ● Assisted in onboarding new QA team members, reducing ramp-up time by 2 weeks per engineer.

Project: Comprehensive Solution for Call Centers ● Performed functional, regression, and smoke testing of web and desktop applications. ● Developed and executed SQL queries to validate data integrity, ensuring accurate reporting. ● Tested APIs with Postman, creating reusable collections that accelerated regression testing. ● Analyzed logs to diagnose system issues, reducing average bug resolution time by 21%. ● Collaborated with developers and managers, providing actionable feedback during development. ● Reviewed test documentation for completeness and compliance, improving documentation quality by 25%. ● Participated in planning and design discussions, contributing to task estimation and risk assessment. ● Proposed process improvements to increase QA efficiency and consistency. Automation & Technical Exposure: ● Basic automated test execution and result analysis (Playwright + JavaScript / TypeScript). ● Git version control (feature branches, pull requests). ● Familiar with CI/CD concepts.