Agile Test Automation Engineer – Mail Backend Systems (f/m/d)

at subsidary 1&1 Mail & Media Applications SE in Karlsruhe, Berlin or Munich
Full-time | Permanent | Professionals
Reference ID: M-277

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About us

With our strong brands GMX, WEB.DE and mail.com and over 42 million active users, we are the leading email and communications platform in Germany, Austria and Switzerland. From this strong market position, services and apps are developed that simplify users' digital lives - from office tools and cloud solutions to personal ID management.

Your Tasks

Are you passionate about delivering high-quality, secure software at scale? Do you thrive in agile environments where your ideas and expertise directly shape the product? Join us in building and maintaining the backbone of communication for over 42 million active users across GMX, WEB.DE, and mail.com.

As an Agile Test Automation Engineer, you’ll play a key role in ensuring the reliability and performance of our email backend systems. You’ll work in a collaborative, cross-functional team where quality is a shared responsibility and innovation is encouraged.

• Collaborate with product owners and business engineers to understand new features and translate them into robust, automated test cases.
• Design, implement, and maintain integration, acceptance, and performance tests for our RESTful APIs and backend services.
• Ensure test reliability and efficiency in CI/CD pipelines using tools like GitLab-CI, Jenkins, and Docker.
• Continuously evolve our test strategy, develop custom testing tools, and contribute to process improvements.
• Actively participate in agile ceremonies and contribute to a culture of quality, learning, and continuous improvement.

We Appreciate

Do you have a degree in Computer Science or a related technical field? Do you feel comfortable as part of an agile team and enjoy helping to shape test automation? Do you write high-quality code, have a "hands-on" work attitude, and like to engage with new technologies? Then we look forward to receiving your application. We believe you will be most successful in this role, with the following experiences/skills:

• Proven experience in automated testing of RESTful APIs (JSON), ideally using Java and RestAssured or similar frameworks.
• Hands-on experience with CI/CD environments and containerized testing setups.
• A proactive mindset with a passion for breaking systems, identifying edge cases, and writing clean, maintainable test code.
• Bonus: Experience with performance testing tools and a curiosity for areas like DevOps, security, or data science.
• Strong communication skills and a collaborative spirit—you enjoy working in agile, interdisciplinary teams.

What else we would like to tell you

• Our corporate culture: No dress code, flat hierarchies, open and transparent communication.
• Individual development opportunities: diverse training courses, e-learning and internal communities, language courses, mentoring.
• Events: Slack Days, open source projects, meet-ups.
• Relocation service: support with relocation to Germany.
• Benefits and additional services: company pension scheme, capital-forming benefits, discounts on our products, job ticket, bike leasing, corporate benefits portal.
• Attractive working conditions: 30 days of holiday, hybrid working, full-time and part-time arrangements, free choice between Linux, Mac, or Windows.
• Social: team events, summer and winter parties, family and care service, sports and fitness programs, subsidized canteen, free fruit and drinks, health courses.
• Topics that are also important to us: Sustainability, diversity, and our values and leadership principles - find out more on our website mail-and-media.com.

apply online now