QA Engineer (Middle / Middle+)

Market insights

Stack

Apply

Upload your CV — we will connect you with the employer directly through our pool.

Description

About the Role This role requires a strong combination of hands-on testing skills, system thinking, and the ability to independently investigate issues across multiple layers (API, database, logs, mobile). You will work closely with engineering and product teams to ensure product quality, reliability, and transparency of system behavior. Key Responsibilities • Perform API, backend, and mobile testing across multiple environments • Validate business logic and data consistency across services • Investigate issues using logs, metrics, and database queries • Create clear, reproducible, and technically complete bug reports • Collaborate with developers to identify root causes of issues • Contribute to test automation and continuous improvement of QA processes Requirements API Testing • Strong knowledge of REST APIs • Experience with Postman / Insomnia • Ability to validate: o JSON schemas o response logic (FastAPI-based services) Databases • Writing SQL queries (PostgreSQL) for data validation • Understanding of transactions, especially in booking-related flows Observability & Monitoring • VictoriaLogs / VictoriaMetrics o Ability to find and analyze request logs using Trace ID • Grafana o Experience working with dashboards o Understanding of: ▪ error rates (4xx / 5xx) ▪ basic performance metrics Git & CI/CD • Basic Git commands (clone, checkout, pull) • Understanding of CI/CD pipelines (GitLab) and test execution across environments Mobile Testing (High Priority) • Experience testing iOS and Android applications • Understanding of React Native specifics (as a plus) • Working with: o emulators/simulators (Xcode, Android Studio) o real devices Debugging tools: • Flipper / Charles / Proxyman for traffic interception and modification Crash analytics: • Experience with tools like Sentry Bug Reporting & Environment Context • Ability to create structured and reproducible bug reports • Clear understanding of differences between Staging and Production environments • A

Employer contacts (email/phone/telegram) are hidden from the public preview — send your CV, and we will connect you directly.