Oleksandr Chekusov

Middle/Senior Manual QA Engineer with 6 years of hands-on experience in testing complex products across mobile, web, and backend platforms. Proven experience as a Key QA Engineer, acting as a quality owner and primary point of communication between clients, developers, and product teams. Strong analytical mindset, solid understanding of the full testing lifecycle, and the ability to work effectively in Agile environments. Experienced in validating business-critical functionality, integrations, and data flows, with a focus on product quality, risk mitigation, and continuous improvement of testing processes. Core Skills & Tools: Testing scope: iOS / Android applications, mobile web, web applications, backend, APIs, microservices, payment integrations; Technologies: HTML, CSS, SQL, JSON; Testing fundamentals: SDLC, STLC, bug lifecycle, software testing theory, full test documentation stack (test plans, test cases, checklists, reports); Test management & collaboration: Jira, Confluence, Redmine, Monday; Methodologies: Agile (Scrum, Kanban); Web testing: Chrome DevTools, browser extensions, cross-browser testing; API testing: Postman, Swagger; Databases: MySQL, PostgreSQL, MongoDB (DataGrip, DBeaver, Compass); CI/CD: GitLab, Jenkins, TeamCity; Logs & monitoring: Grafana, Sentry, Elastic, Countly, Logcat; Mobile testing: Android Studio, Genymotion, Xcode, Firebase, Charles, Fiddler, BrowserStack; Additional tools: RabbitMQ, Lens, AWS, Figma, Corezoid, TestRail, Zephyr, TestIO, JMeter, Strapi, Magento; Automation support: Running automated test suites and analyzing results. Writing test-cases for AQA. Languages English — Upper-Intermediate Ukrainian — Native Russian — Advanced Polish — Intermediate Japanese — Basic