Software Engineer (C++), Backend

Tokyo, Japan (MJHQ)
1 - Software Development – Backend System Team /
Full Time, ENG JD /
Mujin is a robotics start up company. In the past 12 years, we're focused on the Factory Automation area to solve the lack of labor shortage. Our mission is "Liberate humans from manual labor to make them focus on creativity, innovation, and making the world a better place."
Currently, we’re rapidly expanding our business in Japan, US, and China. 

To support our global development, we're looking for more talents and Robotics enthusiasts to join us. As a particularly important part of Mujin, Our backend team focuses on the Operating System architecture, design, development, and deployment of Mujin's motion planning AI-equipped intelligent robot controllers.
Also, Mujin is going to global marketing this year, you will be given a lot of chances to participate in our globalization development.


    • <Design and implement a wide variety of system software>
    • Real-time OS and real-time network protocols
    • Linux kernel modules, Linux boot, and base system, hardware drivers
    • System security, TPM, and data encryption
    • Build tools and infrastructure, deployment, remote control, and upgrade system

    • <Design and implement reliable, high-performance backend services and APIs for industrial robot controllers>
    • High-performance HTTP server
    • ZeroMQ inter-process communication
    • High-efficiency database
    • Cloud services

    • <Others>
    • Develop drivers to interface with industrial hardware such as robots, conveyors, 3D cameras, sensors, PLC, AGV, ASRS, WMS
    • Solve cutting-edge complex technical challenges throughout the entire system
    • Occasional business trips to customer sites in Japan and abroad

Minimum Requirements

    • BSc degree or higher in Computer Science, Computer Engineering, or related fields, or equivalent academic or work experience
    • Excellent experience and high proficiency in C++ and Python
    • Advanced Linux user, excellent experience in Linux software development
    • Expert in Linux internals, networking stack, network protocols, routing, async I/O, Docker and its internal workings
    • Experience in full-stack development
    • Technical communication skills in English

Preferable Requirements

    • Expert in real-time OS, Linux kernel module development, EtherCAT
    • Experience in robotic software development


    • We are looking for those who are prepared to dedicate themselves to facing big challenges, work proactively and independently, and take ownership when working with members across the teams!
    • You will get your “hands dirty” working on all aspects of the industrial robot controller, not being confined to a specific component in the system. The work is challenging, mostly like something that you have never done before, requiring extensive research.
    • Since the work is widely applicable, it will affect everyone in the engineering team, making the Backend System Engineers the likely “go-to” people. You will have chances to travel and work onsite to integrate cutting-edge industrial systems such as AGVs and ASRS.

3-8-5 Tatsumi, Koto-ku, Tokyo 135-0053, Japan
Nearest Station: Tatsumi Station, Shinonome Station

Work Hours
8:45 - 17:45 (with a 60-minute break)

・Flexible, depending on experience and skills
・Salary revision twice a year
・Additional bonuses or incentives may be available based on performance

・Two days off per week (Every Saturday and Sunday)
・Annual paid leave
・Year-end vacations
・Celebration or condolence leave
・Family caregiver leave
・Maternity leave
・Childcare leave
・Other holidays as defined by the company

Company Benefits
・Flexible dress code policy
・Commuting allowance
・Social insurance (including Employment, Industrial Accident Compensation, Health Insurance, and Pension)
Free buffet lunch every workday
Free vending machines (offering drinks and snacks)
High-end coffee machine
Exclusive Employee Gym Access
・Monthly team dinner support

Relocation Support
If you relocate from outside of Japan, we will provide the following support.
・Visa sponsorship
・One-way flight to Japan
・Shipping expenses covered up to a specified limit
・Temporary housing assist
・Permanent housing assist