Senior Technical QA Tester (f/m/d)

We are Kolibri Games - a mobile games developer from Berlin. We’re looking for a Senior Technical QA Tester to join the Idle Bank Tycoon team in Berlin. You’ll own the quality of the game end-to-end: from feature testing and test automation to performance profiling and process improvement; embedded in a cross-functional team alongside Product, Game Design, and Engineering.

Responsibilities

• Own features and test coverage end-to-end, from identifying QA flows and edge cases based on product requirements to release sign-off and post-release monitoring of the game.
• Design, write, and review test plans and test maps; review submissions from other QA team members and define the QA strategy for complex features.
• Perform technical QA analysis, when needed, including runtime profiling, memory analysis, CPU/GPU usage, and build size validation on iOS and Android.
• Monitor and investigate regressions: frame rate drops, load time increases, APK/IPA size changes across builds.
• Proactively coordinate team playtests and continuously monitor release performance, raising red flags early.
• Drive continuous improvements to QA process and tooling, partnering with the QA manager on workload and priorities across internal & external testers.
• Run and maintain automated test suites on our in-house Test Automation Platform, and convert manual test cases into automated tests using the platform.

Required Skills

• Strong hands-on manual QA/testing expertise across the full test lifecycle, ideally in mobile or gaming.
• Solid understanding of mobile game performance metrics: profiling, memory, build sizes, and frame pacing on iOS and Android.
• Experience with test management tools (Xray, TestRail, Zephyr or similar) and Agile/Scrum workflows in Jira.
• Experience coordinating QA workload across internal and external testers.
• Familiarity with AI-assisted tooling for testing, triage, or workflow automation.
• Basic Python knowledge, enough to run automated test suites and convert manual tests to automation using our in-house Test Automation Platform.
• Strong communicator in English (written and verbal) across cross-functional teams.
• Proactive, ownership-driven, and comfortable making calls in ambiguous situations.

Desirable Skills

• Extensive QA experience in mobile gaming, particularly F2P/LiveOps.
• Experience with CI/CD tools such as Jenkins or GitLab.
• Familiarity with Unity.
• Hands-on experience with mobile profiling tools (Xcode Instruments, Android Profiler, or equivalent).
• Familiarity with Firebase, SDKs, and third-party plugins.
• Basic SQL and familiarity with data pipelines.