Senior Software Engineer – IAM & Zero Trust (m/f/x)

Your mission In the Core Services team, you will build the foundational backbone of our cloud and hosting solutions, with a strong focus on Identity and Access Management (IAM) and Zero Trust architectures. You will play a key role in driving the digital sovereignty and security of the platforms trusted by internal teams and external secunet cloud customers alike. Working at the intersection of software engineering and operations, you will manage and scale highly available edge infrastructures. Your tasks Design, build, and operate scalable core services while delivering secure APIs (RESTful, OpenAPI, gRPC) across edge and Zero Trust environments. Architect and evolve existing Identity and Access Management (IAM) systems for seamless integration into the broader secunet cloud ecosystem. Manage and optimize Cloudflare infrastructure, including CDN operations and traffic routing, as part of our strategic technology partnership. Build and refine automated CI/CD pipelines (GitLab CI) to enforce high standards of code quality and security. Collaborate closely with Product Owners, Architects, and cross-functional teams to translate business requirements into resilient software architectures. Mentor junior engineers and participate in an on-call rotation to ensure high platform availability and reliability. Requirements Solid software engineering background with strong proficiency in Python, Go, or Rust, along with hands-on experience in modern frameworks such as FastAPI. Extensive experience designing Zero Trust architectures and in-depth knowledge of identity providers and authorization systems (e.g., Keycloak, OpenStack Keystone, OpenFGA, or Google Zanzibar). Proven track record in integrating and operating edge infrastructure and CDNs (specifically Cloudflare). Deep familiarity with the CNCF cloud-native ecosystem (Docker, Kubernetes), network fundamentals (TCP/IP), and relational database architectures (PostgreSQL, SQLite). Strong analytical mindset with high standards for systems architecture, data modeling, and robust testing practices (unit, functional, and integration testing). Professional working proficiency in English (B2 level or higher), primary residence in Germany (mandatory), and willingness to participate in an on-call rotation (with additional compensation). What you can expect In this role, you will have the autonomy to make architectural decisions across Core Services and IAM, shipping cutting-edge technology directly to production. Our experienced engineering team fosters continuous knowledge sharing and collaborative code reviews to tackle complex security challenges. You will actively shape our tech stack and drive our open-source strategy within high-security environments.