Site Reliability Engineer – Core platform (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 maintain and optimize Exoscale’s OS and hypervisor fleets, network stacks, and security layers, while contributing to automation, tooling, and platform architecture. Ideal candidates have strong Linux, virtualization, networking, and container experience, with proficiency in Golang or Python.

Role Insights:

• Design and maintain our core Linux-based platform ecosystem.
• Develop and manage our PKI, secrets management, and security systems.
• Contribute to internal platform tooling, automation, and orchestration development.
• Enhance the developer experience (DX) by delivering self-service systems and pipelines.
• Play a key role in the architecture and design of Exoscale’s platform systems.
• Improve processes to ensure scalability, security, and high availability.
• Participate in code and change reviews to maintain high development standards.
• Join the on-call rotation after completing a training period.

What Makes You Unique:

• Experienced with Linux, including networking and security filtering.
• Knowledgeable in platform security components and PKI systems (experience with HashiCorp Vault is a plus).
• Proficient in Golang (mandatory for this position).
• Familiar with service discovery and DNS systems at scale.
• Experienced in containerization and orchestration (Kubernetes is a plus).
• Comfortable working with KVM virtualization.
• Skilled in configuration management and large-scale infrastructure.
• Passionate about automation — always looking for ways to optimize workflows and reduce manual effort.
• A true team player who thrives in a distributed team environment.
• Curious, autonomous, and eager to learn new technologies every day.
• Strong communicator in English, both written and spoken.

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.