Senior Python Backend Engineer (f/m/d) @ A1 Competence Delivery Center

Strength. Care. Growth

A1 Competence Delivery Center is a vital component of A1’s telecommunications business. Acting as an expertise hub, CDC is dedicated to delivering a full range of high-quality IT, network, financial and other services to support A1’s operations across all OpCos, independent of location.

Using the power of being OneGroup and leveraging synergies, CDC enables transparency of resources, key skills and knowledge expansion and personal career growth opportunities’ enhancement, paired with job stability.

You will know we are the right place for you, if you are driven by:

• Opportunities to learn and build your career.
• Meaningful work in a stable and fast-paced company.
• Diversity of people, projects, and platforms.
• A supportive, fun, and inspiring place to work.

Role Overview:

As a Senior Python Backend Engineer, you will play a key role in designing, developing, and maintaining backend services in a Linux environment. You will ensure secure integrations, high availability, and smooth system upgrades, while collaborating with the team to optimize performance, manage dependencies, and support reliable production operations.

Role insights:

• Perform OS-level operations and troubleshooting (Linux / RHEL 9).
• Develop, maintain, and optimize Python backend services and APIs.
• Integrate systems with Active Directory (LDAP) for secure authentication.
• Manage and upgrade Python environments (versions, dependencies, security).
• Plan and execute upgrades, including impact analysis and testing.
• Implement monitoring, logging, and alerting for high availability.
• Maintain clear and concise technical documentation.

We’ll know you can make it if you have:

• Degree in Computer Science, Informatics, or related field.
• 3 years of expiriance as a Python backend developer.
• Strong knowledge of Django.
• Experience with Active Directory / LDAP integration.
• Solid understanding of relational databases (e.g., Oracle) and ORM frameworks.
• Experience with CI/CD pipelines and DevOps tools (e.g., GitHub).
• Strong analytical and problem-solving skills in production environments.
• Team-oriented with good communication skills.
• Fluent in English (German is a plus).

Our gratitude for the job done will be eternal, but we’ll also offer you:

•  Valuable experience in one of the fastest-growing and most innovative industries.
•  Challenging assignments with strong opportunities for personal and professional growth in a multinational environment.
•  Hybrid working model supporting a healthy work-life balance.
•  Thousands of online and in-person Learning opportunities for you to grow.
•  Modern, open, and friendly work environment that fosters continuous learning and the development of both technical and soft skills.
•  Special employee tariffs and a wide range of attractive employee benefits.