Automation tester (m/f/d)

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.

Project Description:

The team is responsible for the development & operations of Monitoring and DataAnalytics Tools for the Network Control Platform of Deutsche Telekom Germany (AAA Fixed Net Germany).

The project is responsible for controlling Internet access and managing the underlying network infrastructure for Deutsche Telekom Germany. It supports millions of concurrent user sessions while ensuring high availability, scalability, and reliability.

Key capabilities include:

• Authentication, Authorization, and Accounting (AAA) for secure user access management.
• Dynamic service provisioning to enable automated customer and network service activation.
• Support for all-IP services, including MagentaTV, IP telephony, and other next-generation network services.

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

Required Skills

• Strong knowledge of IP network infrastructure.
• Advanced Linux expertise.
• Experience with IP protocols (Radius, Diameter, SIP, SOAP).
• Cloud technologies: containers, Kubernetes, Docker.
• Database knowledge (Redis, SQL databases).
• Experience with software testing methodologies (manual and automated testing).
• Familiarity with testing tools (e.g., Jira, Robot Framework).
• CI/CD toolchain experience (e.g., Git, Ansible, Cucumber, Flux, Argo).
• Basic programming skills (e.g., Java, Python, JavaScript) are an advantage.
• Experience with AI-supported testing tools is a plus.
• Strong understanding of requirements and specifications.
• English proficiency (minimum B2 level).

Methodological Competencies

• 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.

What do we offer you?

Work environment & flexibility

• International, dynamic and collaborative environment.
• T-Social: social initiatives (sports, community, health, ...).
• Hybrid work model (remote/on-site).
• Flexible working hours.

Growth & development

• Customized training: access to Coursera to learn whatever you want, whenever you want.
• Weekly language classes (English & German).
• International Mentoring Sessions & Experience Days.

Compensation & benefits

• Flexible compensation plan (health insurance, meal vouchers, childcare, transport).
• Telemedicine.
• Life and accident insurance.
• Social fund.

Wellbeing & time off

• 26+ working days of vacation per year.
• Free access to specialist services (medical, legal, wellness).
• 100% salary coverage during medical leave.