Software Engineer – Internal Tooling & Infrastructure

Strength. Care. Growth

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

Using the power of A1 Group and leveraging bynergies, CDC enables transparency of resources, key skills and knowledge expansion and personal career growth opportunities’, paired with job stability.

will

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.

Would you like to join us?

Your daily routine would include:

• 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.

We’ll know you can make it if you:

• Have solid experience with functional programming, ideally in Clojure;
• Are comfortable working in Linux environments and have a solid understanding of UNIX systems;
• Have experience with Kubernetes (or a strong desire to deepen their knowledge in this area);
• Are curious and interested in building and maintaining distributed systems;
• Have experience or interest in Go, especially in the context of infrastructure tooling;
• Are willing to contribute to open-source projects;
• Enjoy working across multiple domains and technologies.

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

• Innovative technologies and platforms to “play” with;
• Modern working environment for your comfort;
• Friendly, ambitious, and motivated teammates to support each other;
• Thousands of online and in-person learning opportunities to grow;
• Challenging assignments and career development opportunities in multinational environment;
• Attractive remuneration package;
• Flexible working schedule and opportunity for home office;
• Numerous additional goodies, including, but not limited to free A1 services, discounts, health insurance and services, sports center, childcare, team and family events, etc.

Not sure yet? See us in action in our A1 Blog.
Any questions? Contact Nadya Georgieva.

Sounds good? Apply now!

Deadline for application: 16.07.2025
Only shortlisted candidates will be contacted.