Senior Platform Engineer

About the job Project info: 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. We are looking for someone who builds and maintains the tooling and infrastructure used by engineering teams to compile, test, and ship software efficiently. Responsibilities: 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 Job requirements: 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 Must possess a legal work permit in Poland Benefits: General benefits - depends on the form of employment remote work Referral program with financial bonus Life Insurance Budget for development (including language courses and others), clear career path with the possibility to gain experience in international environment Access to internal Learning Platform with multiple trainings oriented for professional growth Lifestyle benefits: Access to MyBenefit platform (Multisport included) Team Building activities Charity initiatives Working environment promoting diversity and inclusion Health benefits: Private medical care - Platinum Package