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Software Engineering

Senior QA Engineer

Hamburg, DEU full time EUR 70,000 to EUR 80,000

Our client is a global adtech company developing AI-powered mobile advertising technology that processes billions of real-time predictions every day. They are seeking a QA Engineer with strong mobile testing experience to ensure the quality and reliability of SDKs, backend systems, and analytics platforms. The role combines manual and automated testing, requiring expertise across mobile applications, APIs, cloud infrastructure, and test automation tools. This is an opportunity to work on large-scale, high-performance technology used by hundreds of millions of users worldwide.

Our client is a leading global technology company specialising in AI-driven mobile advertising and app monetisation solutions. Their platform delivers real-time advertising through advanced machine learning, processing billions of predictions daily across a large-scale distributed ecosystem.

They are looking for an experienced QA Engineer to join their User Experience team. This role is responsible for ensuring the quality, stability, and performance of mobile SDKs, backend services, and internal analytics platforms that support mission-critical advertising technology.

Key Responsibilities Design, develop, and execute comprehensive manual and automated test strategies, including regression, smoke, integration, and release testing. Validate the quality and performance of mobile SDKs across Android and iOS platforms. Investigate issues across the full technology stack, including backend services, APIs, cloud infrastructure, and data pipelines. Perform post-release validation and root cause analysis to identify and resolve defects. Collaborate closely with Software Engineers and Product teams throughout the development lifecycle. Contribute to technical documentation, testing processes, and continuous quality improvements. Build and maintain automated testing frameworks using modern automation tools. Monitor application health and investigate production issues using observability and monitoring platforms.

Candidate Requirements 3+ years' experience in Quality Assurance with hands-on mobile application testing. Experience testing Android and iOS applications or SDKs. Strong understanding of API testing and backend systems. Experience with test automation tools such as Appium or Playwright. Familiarity with cloud platforms and modern infrastructure technologies, including AWS, Kubernetes, Docker, Kafka, and messaging systems. Experience using monitoring and logging tools such as Kibana and Grafana. Strong analytical and problem-solving skills with the ability to investigate issues across complex distributed systems. Excellent communication skills and experience working closely with cross-functional engineering teams.

What's on Offer

This is an opportunity to join a fast-growing international technology company building large-scale mobile advertising platforms used by hundreds of millions of users worldwide. The role offers challenging technical work, exposure to modern cloud and automation technologies, flexible working arrangements, professional development opportunities, relocation support, and the chance to contribute to innovative products operating at global scale.

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