Senior Build Systems Architect

Team: DevOps Team

Location: Tokyo, Japan (MJHQ)

Commitment: Full-Time (English)

Workplace Type: onsite

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