Sergey Salyk

- Acted as QA Technical Lead / Lead SDET for a 14-person cross-functional team delivering Web, Android, and Telegram products. Provided technical direction to 2 manual QA engineers and 1 automation QA engineer through scope delegation, automation reviews, specifications, and shared testing standards.

- Owned release readiness and QA sign-off, defining regression scope, release checks, risk asse

- Designed and built two automation frameworks from scratch using Python, Pytest, Playwright for Web UI, and Appium for Android, integrating both into GitLab CI/CD.

- Reduced Web regression effort by 90%, from up to 5 working days to approximately 0.5 day, by implementing 240 automated tests covering smoke, regression, and critical user journeys.

- Built the company’s first Android smoke aut

• Promoted through performance review in recognition of senior-level ownership of backend quality, automation architecture, and release-risk investigation.

• Across my tenure at Ozon, built automated quality coverage for five core WMS and warehouse-logistics microservices, replacing fragmented Swagger and Postman checks with 300+ REST, gRPC, and integration scenarios in CI.

• Designed the backen

• Took ownership of backend quality for warehouse and logistics microservices, covering REST API, gRPC, integration, and performance testing.

• Designed positive, negative, validation, and business-critical scenarios using Python, Pytest, SQL, Swagger/Postman, logs, and monitoring tools.

• Built reusable automation patterns and CI-ready test infrastructure for services where business logic was c

• Developed and maintained UI and API automated tests using Python, Pytest, Playwright, and Allure.
• Designed reusable test utilities and test-data generators that reduced repetitive manual preparation and supported scalable test coverage.
• Collaborated with DevOps to integrate automated checks into GitLab CI/CD and make test results available to the team.
• Combined automation work with hands-o

• Independently tested web UI, REST APIs, and React Native mobile applications across feature delivery and release cycles.
• Designed positive, negative, and integration test scenarios; used Postman, Swagger, SQL, GitLab, Grafana, and Graylog to validate backend behavior and troubleshoot defects.
• Improved test coverage and test-data preparation for smoke and regression testing; participated in r

• Performed functional, smoke, regression, and integration testing for web applications; created and maintained test cases and checklists.
• Tested REST APIs using Postman and Swagger and used SQL to validate data and investigate defects.
• Reported defects with clear reproduction steps, expected results, and supporting evidence; verified fixes together with developers.
• Participated in release v

• Provided L3 technical support for internal systems and investigated production issues using SQL, application logs, and monitoring tools.
• Reproduced incidents, analyzed data flows, and collaborated with development teams to identify root causes and validate fixes.
• Built a strong foundation in backend diagnostics, production support, and issue investigation before moving into QA.