T‑Systems is part of the Deutsche Telekom Group, with around 30,000 employees worldwide. We create technology with purpose to generate a positive impact on society. We are looking for curious talent, eager to learn, take on challenges, and contribute ideas that transform our customers’ experience.

We trust people: we offer autonomy, continuous support, and a collaborative environment where you can grow without limits. We are one global team, guided by respect, integrity, and a passion for doing better every day.

Job Description

Project Description:

- Control of internet access and network infrastructure.
- Management of millions of parallel sessions.
- Provision of key functions such as:
- Authentication / Authorization / Accounting (AAA).
- Dynamic provisioning
- Support of all-IP services (e.g. MagentaTV, IP telephony).

Activity Description:

- Execute and validate software releases through structured testing.
- Develop and enhance test automation frameworks.
- Maintain and evolve CI/CD pipelines and test environments.
- Operate and support test systems, including deployment of software deliveries.
- Design, execute, and document platform-level test cases, including reporting for formal acceptance.
- Define and refine test cases to extend coverage and validate new functionalities.
- Integrate solutions into the Deutsche Telekom test framework.
- Ensure proper documentation within internal tool systems.
- Perform troubleshooting and provide operational support during testing and rollout phases.




- Support internal and external stakeholders in the test environment.

Qualifications

Required Skills

- Strong knowledge of IP network infrastructure.
- Experience with IP protocols (Radius, Diameter, SIP, SOAP).
- Database knowledge (Redis, SQL databases).
- Experience with software testing methodologies (manual and automated testing).
- Familiarity with testing tools (e.g., Jira, Robot Framework).
- Experience with AI-supported testing tools is a plus.
- Strong understanding of requirements and specifications.
- English proficiency (minimum B2 level).
- Analytical and structured thinking.
- Detail-oriented and precise working style.
- Strong skills in defect analysis and documentation.
- Solid understanding of testing processes (e.g., Agile, Scrum).

Personal Qualifications

- Strong teamwork and communication skills, especially in international environments.
- High level of initiative and accountability.
- Solution-oriented mindset.
- Willingness to learn and adapt to new technologies.
- Flexibility to work night shifts and participate in on-call duties.

Additional Information

What do we offer you?

- T‑Social: social initiatives (sports, community, health, ...).
- Hybrid work model (remote/on-site).
- Flexible working hours.

Growth & development

- Weekly language classes (English & German).
- International mentoring sessions & experience days.
- Versátil compensation plan (health insurance, meal vouchers, childcare, transport).
- Social fund.

Wellbeing & time off

- 26+ working days of vacation per year.

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