Senior Build Systems Architect

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 Mujin is hiring a Senior Software Engineer for the DevOps team. The team is currently small, and you will play a key role in building and optimizing large-scale C/C++ build systems, with CI infrastructure supporting the workflow. 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