Mujin

Senior Software Engineer (C++ & Python)

Japan

Full-Time

On-site

TLDR

Design WES software that orchestrates warehouse inventory, order fulfillment, robots, conveyors, sensors, PLCs, AGVs, ASRS, and WMS.

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.

Team Introduction

As a Software Engineer on Mujin's Warehouse Execution System (WES) & Fleet Management (FM) team, you will play a key role in designing, developing, and deploying Mujin’s advanced warehouse execution and fleet management systems.

Our team works at the intersection of robotics, automation, and software engineering to optimize warehouse operations and ensure seamless orchestration of robots and industrial equipment.

Responsibilities

Design, develop, and maintain WES software to manage warehouse inventory, scheduling, and order fulfillment.

Implement and integrate drivers for industrial hardware, including robots, conveyors, 3D cameras, sensors, PLCs, AGVs, ASRS, and WMS.

Work with real-time operating systems (RTOS) and network protocols to ensure system efficiency and low-latency communication.

Ensure system security by implementing robust encryption and access control mechanisms.

Design and optimize high-performance backend services and APIs for seamless integration with third-party warehouse software.

Develop and enhance scalable HTTP servers to handle large-scale warehouse operations.

Collaborate closely with backend and frontend teams to improve system usability and user experience.

Maintain code quality and testing frameworks to ensure high system reliability.

Occasionally travel to customer sites, both domestically and internationally, for deployment and support.

Tackle complex technical challenges in a fast-paced environment.

Take on additional tasks related to the above responsibilities as needed.

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.

Preferable Requirements

Expert in real-time OS, Linux kernel module development, EtherCAT

Experience in robotic software development

Attractiveness

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 Software 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.

Interview Process:

Coding Assessment: Initial technical evaluation.

HR Interview: Discussion with Human Resources.

Hiring Manager Interview: One or two rounds with the hiring manager.

Take-Home Assignment & Feedback Interview: A task to complete on your own, followed by a feedback session.

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

Explore Mujin Perks & Welfare 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

Benefits

Flexible Work Hours

Flexible dress code policy

Free Meals & Snacks

Free vending machines (offering drinks and snacks)

Health Insurance

Japanese Social Security (Health Insurance, Pension, Labor Insurance)

Home Office Stipend

Commuting allowance

Housing assistance

Assistance for housing

Paid Parental Leave

Maternity leave and Childcare leave

Paid Time Off

Monthly team dinner support

Visa Sponsorship

Wellness Stipend

Exclusive Employee Gym Access

Mujin

Mujin develops MujinOS, an intelligent operating system for industrial robotics, focusing on advanced automation solutions that enhance supply chain efficiency. By leveraging unique robotic control technology, we tackle pressing societal challenges like labor shortages and logistics issues, making industries smarter and more efficient.

Founded: Founded 2011
Employees: 51-200 employees
Industry: industrial automation
Funding stage: Series C+
Total raised: $410M raised
Last funding: Raised December 2025

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