Platform Engineer (Developer Productivity / Build Optimization)

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 focused on improving the development and build processes of large-scale robotics software systems. This role is not limited to CI/CD operations. You will identify fundamental bottlenecks in the development workflow, such as slow builds, unreliable dependencies, and complex build configurations, and solve them at the build system level. This role is a strong fit for engineers who have worked on engineering productivity, developer platforms, or internal tooling teams, where they improved build or development workflows at a system level, beyond simply operating CI/CD pipelines. You will work on designing and evolving the build system itself to improve developer productivity, reproducibility, and scalability across large C/C++ codebases. Examples of challenges you may work on: • Reducing build times from hours to minutes by redesigning the build system. • Re-architecting dependency management to remove hidden coupling between modules. • Improving build reproducibility across local and CI environments. Responsibilities

• Analyze existing build systems and propose structural improvements or migrations where necessary
• Design and implement a modern and optimized build system, adhering to best practices and coding standards.
• Create early prototypes and write technical documentation to propose system changes.
• Manage and improve the CI infrastructure and tools.
• Ensure good coding practices and code quality through consistent code reviews.
• Collaborate with other engineering teams to improve and optimize the CI tools.

Minimum Requirements 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.

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