Senior QA Engineer (f/m/d)

Location: Hamburg

Employment Type: Full time

Location Type: Hybrid

What’s in It for You?

• Go Big. Own projects with impact on 770M users and push adtech boundaries.
• Move Fast. Ship solutions multiple times a day, learn from results, and keep momentum.
• Be Direct. Solve problems openly and collaborate across teams.
• Thrive Together. Grow with a diverse, global team of people from over 40 different countries that learn from each other.
• Have Fun. Celebrate wins, enjoy daily victories, and bring your energy.

Who You Are

You have 3+ years in QA with hands-on mobile testing experience. You test more than UI flows, you dig into the full stack, from SDK behavior on device to the backend systems behind it, using tools like Kreya and k9s to investigate services, and Kibana and Grafana to monitor system health. You're comfortable working with AWS services and understand how container orchestration ( Kubernetes, Docker), databases, and messaging systems ( Kafka, SQS) behave under real conditions.

What You’ll Do

• Own testing end-to-end: develop and execute comprehensive test strategies (regression, smoke, and beyond) and take ownership of post-release and post-implementation validation. You don’t just report bugs—you understand the system well enough to know why they happen.
• Test more than UI flows; investigate SDK behavior on device and backend systems behind it.
• Collaborate closely with engineers; participate in feature requirement discussions and contribute product-related insights based on testing findings. Read and write technical documentation.
• Build and maintain automated test suites (Appium, Playwright) alongside manual testing responsibilities.

Requirements & Qualifications

• 3+ years in QA with hands-on mobile testing experience.
• Experience testing full stack: mobile SDKs, backend services, and data pipelines.
• Proficiency with automation tools such as Appium and Playwright.
• Experience with monitoring and observability tools like Kibana and Grafana.
• Familiarity with AWS services, Kubernetes, Docker, Kafka, and SQS.
• Strong collaboration skills and ability to contribute to technical documentation.

Team Description

The User Experience team drives adjoe Ads—our programmatic in-app advertising platform. The team handles both the SDK side (Kotlin/Swift) running inside publisher apps and the analytics side (dashboards, data frameworks) powering real-time revenue performance and data quality assessments. The environment requires maintaining stability and performance within external apps and devices.

Benefits & Perks

• Global relocation support to Hamburg for eligible candidates.
• Opportunities to work on high-impact platforms reaching hundreds of millions of users.
• Collaborative, diverse, and international team culture.