Senior Platform Engineer

We are looking for an experienced Build & Platform Engineer to join a Platform Engineering team responsible for developing and maintaining a platform that supports software build, testing, and delivery processes. The team works on a large-scale monorepository based on Bazel, Nix, and GitHub Actions, supporting projects developed in C++, Java, Python, Go, and JavaScript. The platform provides CIaaS and reusable CD configurations including Kubernetes deployment solutions such as canary releases.

• Strong hands-on experience with Bazel (key requirement)
• Experience working with large-scale monorepositories or complex build systems
• Senior-level or Tech Lead experience
• Ability to work independently after a short technical onboarding
• Strong understanding of Linux environments
• Experience with CI/CD automation and developer tooling
• Good understanding of C++ build processes and toolchains

Nice to have:

• Experience with Nix
• Experience with LLVM
• Knowledge of GitHub Actions
• Experience with Kubernetes
• Experience with Bazel Remote Execution
• Experience building and maintaining developer platforms or developer productivity tooling
• Knowledge of glibc overlays and advanced Linux build environments

• Migrate a large monorepository to a new version of Bazel
• Optimize and extend the existing monorepo build setup
• Analyze and improve Bazel configurations, including performance optimizations and Remote Execution setup
• Develop and maintain build infrastructure based on Nix
• Support C++ and LLVM toolchains for different runtime environments
• Improve dependency isolation for development workflows, Git hooks, and project-specific tooling
• Troubleshoot complex build and infrastructure issues
• Collaborate with engineering teams to improve developer productivity and CI/CD processes

Must possess a legal work permit in Poland