Agile Test Automation Engineer - Backend (f/m/d)

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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.

Our benefits

Lived corporate culture

Transparency, open communication and short decision-making processes

Wide range of further training

E-learning, seminars, conferences and mentoring

Renowned TEC-Campus

Conferences, lecture series, courses, open source projects, community meetings, user groups

Active health care

Sports and fitness classes, lectures, discounts at fitness and health centers, fresh fruit and drinks for free

Mobility

Generous subsidy for job bike leasing and the job ticket

Flexible working models

Home office, mobile office, flexible working hours, trust-based working time arrangements

Financial benefits

Company pension scheme, discounts on our products and various leisure activities

Legendary events

Summer and winter parties, additional workshops and team events

Your profile
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.
Our benefits in detail
- 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.

We are brand. With GMX, WEB.DE and mail.com and over 42 million active users, we are the leading email and communication platform in Germany, Austria and Switzerland.

We are future. Our services and apps simplify digital life from cloud storage to news and ID management.

You are at home. Your digital passion finds a professional home with us. Your strength makes us stronger, your expertise complements our ideas, your success becomes visible. Together we shape the digital future.

Diversity enriches. Different cultures, nationalities, genders, age groups, sexual orientations and religions as well as people with disabilities - we desire diversity and encourage it. Because only teams that reflect all facets of society offer the best framework conditions for creativity and make a company productive and distinctive. We value diversity and welcome all applications.

Apply now

We look forward to receiving your application, including your salary expectations and the reference number given above. Please use our online application form. If you have any questions about the position or the application process, please send us an email.

1&1 Mail & Media Applications SE
Recruiting & Candidate Management
Brauerstraße 48
D-76135 Karlsruhe

jobs@mail-and-media.com

We are awarded!

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