Go Developer (Internal Tooling & Infrastructure) (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:
You will design and maintain Clojure tooling for Kubernetes workflows, contribute to distributed systems, and operate Kubernetes operators for networking and firewalling. The role also involves developing Golang open-source tools, collaborating with SRE and infrastructure teams, and participating in the on-call rotation.

Role Insights:

• Design, implement, and maintain internal tooling written in Clojure to support Kubernetes-based workflows.
• Contribute to distributed systems for job execution and fleet-wide orchestration.
• Extend and operate our Kubernetes operators for managing firewalling and networking (nftables, eBPF).
• Ensure reliability and robustness of internal systems used daily by engineering and SRE teams.
• Participate in the development and maintenance of Golang-based public open-source tools (e.g., Terraform provider, CLI, Kubernetes controllers, plugins, etc.).
• Participate in code reviews and technical discussions.
• Collaborate closely with SREs and other infrastructure teams.
• Take part in the on-call rotation after a training period.

What Makes You Unique:

• Experience or interest in Go, especially in the context of infrastructure tooling.
• Comfort working in Linux environments with a solid understanding of UNIX systems.
• Experience with Kubernetes, or a strong desire to deepen knowledge in this area.
• Curiosity and interest in building and maintaining distributed systems.
• Willingness to contribute to open-source projects.
• Solid experience with functional programming, ideally in Clojure.

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

• Innovative technologies and platforms to work with.
• Modern working environment for your comfort.
• Friendly, ambitious, and motivated teammates to support each other.
• Thousands of online and in-person learning opportunities for you to grow.
• Challenging assignments and career development opportunities in multinational environment.
• Attractive compensation package.
• Hybrid working model.
• Numerous additional benefits, including, but not limited to free A1 services.

If you have any questions,  please do not hesitate to contact Nadya Georgieva.