Job Description

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.

We are looking for a Backend Engineer to design, build, and own the core backend systems that power our industrial robotics platforms. In this role, you will take end-to-end ownership of backend components supporting robot controllers, working close to hardware, sensors, and operating systems to deliver reliable, high-performance systems in real-world production environments. You will design and operate low-latency services, data-intensive pipelines, and robust communication paths that directly influence system behavior on the factory floor. This role requires strong systems thinking, a focus on performance and reliability, and the ability to drive improvements independently across complex, evolving systems.

Responsibilities

Design and own backend systems for industrial robotics platforms

• Take end-to-end ownership of backend components supporting industrial robot controllers
• Design, implement, and maintain reliable backend services and APIs with strong focus on performance and stability
• Work on low-latency communication paths, including high-performance HTTP services and inter-process communication (e.g., ZeroMQ)

Integrate and support sensor-driven data flows

• Develop and maintain backend components that interface with sensors such as 3D cameras and other industrial devices
• Work with sensor SDKs, drivers, and APIs to ensure predictable data ingestion and behavior
• Debug issues that span application logic, OS behavior, and device interaction

Build and operate data-intensive backend pipelines

• Own and continuously improve high-performance data pipelines that influence system-wide behavior
• Design database usage and data access patterns with strong awareness of scale and efficiency
• Contribute to defining, validating, and improving system metrics and KPIs

Drive system reliability and operational excellence

• Diagnose and resolve complex production issues across multiple system layers
• Contribute to controller provisioning, reset, and upgrade workflows with a focus on stability and predictability
• Improve observability, diagnostics, and operational tooling to reduce long-term operational risk

Solve complex, real-world engineering problems

• Operate effectively in complex systems with evolving requirements and constraints
• Make architectural and design decisions balancing performance, reliability, and maintainability
• Drive improvements independently, from problem identification through implementation and rollout

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

Attractiveness

• We are looking for individuals who are ready to take ownership of challenging problems, work proactively and independently, and collaborate closely with team members across the organization.
• You will work hands-on across the industrial robot controller stack, rather than being limited to a single component, and will tackle problems that may be new or unfamiliar, often requiring deep investigation and learning.
• Since this work has broad impact across the engineering organization, Backend System Engineers play a key role and collaborate closely with many teams.

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 (If Applicable): 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

• 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