Mujin is a global leader in industrial automation, redefining supply chain efficiency through MujinOS—our intelligent operating system for robotics. At our core is Machine Intelligence (MujinMI), a unique approach that leverages real-time digital twins and advanced perception, planning, and control algorithms to achieve fully autonomous operations. Our flagship product, MujinController, empowers users with a highly configurable, no-code interface. By integrating cutting-edge motion planning and computer vision, it enables seamless automation for complex applications such as palletizing, picking, and truck unloading. Headquartered in Japan with a growing presence in the US, China, and Europe, we invite you to join a dynamic environment where you can shape the future of automation. ABOUT THE ROLE The team is currently small, and you will play a key role in owning the architecture, evolution, and technical direction of Mujin's large-scale C/C++ build systems. This role focuses on build-system architecture, dependency management, build performance, developer productivity, and long-term maintainability. While CI/CD infrastructure is an important supporting component, this is primarily a build-systems engineering role rather than a DevOps or release-engineering position. RESPONSIBILITIES * Own the architecture and technical direction of Mujin's build systems. * Drive technical decisions regarding dependency management, build graph design, toolchain integration, and build-performance optimization. * Identify architectural bottlenecks and propose long-term improvements to build-system maintainability and developer productivity. * Create prototypes and technical proposals to evaluate and communicate architectural improvements. * Manage and improve CI infrastructure and developer tooling that support the build ecosystem. * Collaborate with engineering teams to improve development workflows, build reliability, and engineering productivity. MINIMUM REQUIREMENTS * Experience owning or driving the architecture of large-scale C/C++ build systems. * Deep understanding of build-system architecture, dependency management, compiler toolchains, linkers, build reproducibility, and build-performance optimization. * Strong knowledge of CMake and modern C/C++ build environments. * Experience integrating build systems within CI/CD pipelines. * Proficiency in at least one programming language used for internal tooling (Python or Go). * Working knowledge of Bash scripting, Linux administration, and containerized environments (Docker, Kubernetes, etc.). * Proficiency with Git version control and collaborative development workflows. PREFERRED REQUIREMENTS * Hands-on experience with Bazel, JHbuild, or Gnome build tools, or building complex, distributed build systems. * Knowledge of package management systems across multiple languages (Python, C++, Rust, or JavaScript). * Experience with Kubernetes * Experience writing technical proposals and design specifications. * Familiarity with Agile software development. IDEAL CANDIDATES Ideal candidates have experience in roles such as: * Build Systems Engineer * Build Infrastructure Engineer * Developer Productivity Engineer * Compiler Infrastructure Engineer Candidates whose primary experience is limited to CI/CD operations, platform administration, or release management without ownership of build-system architecture may not be a strong fit. INTERVIEW PROCESS: * Resume Screening * Take-home coding test * HR interview * Technical interview * Culture/Team fit interview LOCATION 3-8-5 Tatsumi, Koto-Ku, Tokyo 135-0053, Japan WORK HOURS 8:45 - 17:45 (with a 60-minute break) SALARY * Based on experience and skills * Salary revision twice a year * Additional bonuses are available based on performance HOLIDAYS * Every Saturday and Sunday * Annual paid leaves * Maternity leave and Childcare leave * Flex Holiday (take public holidays on days of your choice) * Other holidays as defined by the company COMPANY BENEFITS * Flexible dress code policy * Commuting allowance * Japanese Social Security (Health Insurance, Pension, Labor Insurance) * Monthly team dinner support * Free buffet lunch every workday * Free vending machines (offering drinks and snacks) * High-end coffee machine * Exclusive Employee Gym Access JAPAN RELOCATION SUPPORT * Visa sponsorship * Flight ticket support * Shipping expenses coverage up to a specified limit * Assistance for housing