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 Frontend Engineer on Mujin’s Warehouse Execution System (WES) & Fleet Management team, you will develop user-facing applications used daily in warehouse operations. Your work will shape how operators interact with warehouse systems through browser-based interfaces and industrial Android devices.

You will build reliable, responsive, and intuitive interfaces for demanding production environments, where stability, performance, and usability are critical. Working closely with backend engineers, product managers, designers, and operations teams, you will deliver features that support warehouse workflows and help users monitor and manage automated operations.

The role spans frontend architecture, reusable UI components, backend integration, and development tooling, with opportunities to contribute across the application stack.

Responsibilities

- Design, develop, and maintain user interfaces for WES and fleet management applications across web and industrial Android devices.
- Build reusable, high-performance UI components that support real-time operational data and long-running warehouse workflows.
- Collaborate with designers and product managers to translate operational requirements into intuitive, accessible user experiences.
- Integrate frontend applications with backend APIs and collaborate with backend engineers to deliver end-to-end features.
- Improve application stability, responsiveness, and maintainability through profiling, debugging, and refactoring.
- Develop and improve testing, localization, build, and release pipelines.
- Investigate and resolve production issues in collaboration with engineering and operations teams.
- Participate in code reviews and share knowledge across the team.
- Occasionally travel to customer sites in Japan and abroad to understand operational needs and support deployment.

Minimum Requirements

5+ years of professional software development experience.
A bachelor’s degree or higher in Computer Science, Computer Engineering, or a related field, or equivalent academic or professional experience.
Product development experience using desktop, mobile, or web UI frameworks.
Familiarity with Linux software development and toolchains.
English communication skills sufficient for technical discussions and collaboration.

Preferable Requirements

Product development experience using React, Babylon.js, or WebGL.
Proficiency in TypeScript and JavaScript.
Knowledge of asynchronous programming and threading.
Familiarity with localization and translation pipelines.
Full-stack development experience.

Attractiveness

- Build software that directly supports real-world warehouse operations. You will see your work used by operators and contribute to interfaces that make complex automation easier to understand and manage.

- Our team works collaboratively, reviews ideas openly, and encourages continuous learning. You will have opportunities to take ownership from design through deployment, solve challenging technical problems, and work across frontend and backend systems alongside engineers with deep expertise in industrial automation.

Interview Process:

Coding Assessment: Initial technical evaluation.
HR Interview: Discussion with Human Resources.
Technical Interview: One or two rounds with the frontend team's manager.
Final Interview: Cultural fit interview with hiring manager.

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

About the company

Mujin develops robotics and AI-powered automation for industrial settings. Its products combine robotic systems with software to automate tasks in manufacturing, logistics, and warehousing, and are designed to be installed and integrated into customers’ existing operations. Operations typically involve direct sales of hardware and software, plus service contracts and maintenance to support ongoing performance. Compared with others, Mujin emphasizes end-to-end integration and optimization of complex automation tasks across a global customer base, supported by ongoing service relationships rather than one-off hardware sales. The company’s goal is to improve productivity and operational efficiency for industrial clients worldwide by delivering practical, scalable automation solutions.

Company Size

201-500

Company Stage

Series D

Total Funding

$458.6M

Headquarters

Tokyo, Japan

Founded

2021

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Simplify's Take

What believers are saying

Mujin launched MujinOS subscriptions in April 2026, creating recurring software revenue.
Bloomberg reported June 2026 extension funding, keeping capital available for expansion.
Employee counts rose to 438 by March 2026, supporting global delivery and support capacity.

What critics are saying

Mujin still depends on one platform; a failed MujinOS rollout damages the whole company.
Series D funding and a 2030 IPO plan signal burn risk if commercialization slips.
Competitors like Symbotic and Geek+ pressure margins in warehouse automation through faster deployments.

What makes Mujin unique

MujinOS unifies perception, motion planning, and digital twins across robot vendors.
Accenture Alpha Automation gives Mujin enterprise distribution through Accenture's manufacturing and logistics reach.
The 2025 Global Leadership Cabinet centralizes product, sales, and governance for faster scaling.

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Benefits

Professional Development Budget

Growth & Insights and Company News

6 month growth

1 year growth

2 year growth

CHOSUNBIZ

Oct 12th, 2026

SK Square joins Mujin's funding round, valued above $1B, to link chips and physical AI

SK Square has invested in Mujin, a Japanese physical artificial intelligence (AI) company, as it looks beyond semiconductors into robot control and factory automation. Its overseas investment subsidiary, TGC Square, joined Mujin's Series D round. The amount was not disclosed. The round raised more than 300 billion won in total. Mujin has raised over 600 billion won to date, and was valued at over $1 billion at the end of last year, when NTT Group, the Qatar Investment Authority, and Salesforce Ventures invested. Founded in 2011, Mujin makes "Mujin OS," a robot control platform that manages multiple robots and automation equipment in warehouses and factories. SK Square sees uses in semiconductor packaging, logistics, and plant construction. Linking robots into one system could improve efficiency and help build autonomous fabs.

Bloomberg

Jun 10th, 2026

Factory Robot Startup Mujin Targets Growth With New Funding, Eyes 2030 IPO

Japanese robot software developer Mujin plans to go public by 2030, building up funds and momentum to capture fast-growing demand for factory-use AI.

Associated Press

Apr 7th, 2026

Mujin launches software subscription for robotics operating system MujinOS

Mujin Corp., a robotic automation company, has launched a subscription service for MujinOS, its operating system for intelligent robotics. The move shifts the industry from traditional one-time software licensing to a recurring model, providing customers with continuous software upgrades, technical support and system monitoring. The subscription includes managed upgrades delivered by Mujin's engineering team, dedicated support hours and access to a customer portal for issue tracking. The model aims to reduce operating costs whilst enabling customers to benefit from ongoing advances in vision algorithms, motion planning and analytics. Initially available for single SKU palletising applications, the service will expand to additional applications later this year. Standard and Premium tiers offer flexible support levels, with the operational expenditure model designed to lower barriers to entry compared to traditional capital purchases.

World Today News

Jan 13th, 2026

Mujin secures Japan's largest startup funding round, valued at over $1.5B

Mujin, a Japanese robotics software firm, has secured Japan's largest startup funding round, valuing the company at over $1.5 billion. The company develops a comprehensive software platform that enables robots to perform diverse tasks—from picking and packing to assembly—without extensive reprogramming. Unlike traditional robotics firms focused on hardware, Mujin creates the "brain for robots" using 3D perception, motion planning and AI-powered control. Its dynamic perception technology allows robots to scan and understand environments in real time, adapting to changing conditions without pre-programmed maps. The substantial funding signals growing investor confidence in Japanese robotics and AI companies. Japan's startup ecosystem is experiencing robust growth, supported by government initiatives and increasing venture capital investment, positioning the country as an emerging force in global robotics and artificial intelligence.

IT Business Today

Dec 3rd, 2025

Mujin Secures 36.4 Billion Yen in Series D Funding

Mujin secures 36.4 billion yen in Series D funding. Mujin, a comprehensive automation technology company, has raised a total of 20.9 billion yen in its Series D round through a third-party allotment of new shares from Mitsubishi HC Capital Realty Co., Ltd. and Salesforce Ventures, with NTT Group and Qatar Investment Authority as co-lead investors. In addition, the company raised a total of 15.5 billion yen in debt from multiple banks and financial companies. This brings the total amount raised in the first close of the Series D round to 36.4 billion yen, bringing the company's cumulative funding to 59.6 billion yen. Mujin has also received additional investments from existing investors, including Pegasus Tech Ventures and Accenture, and will continue to raise funds from both existing and new investors in preparation for its second close, scheduled for next year. Mujin utilizes its proprietary advanced robot recognition, motion planning, and digital twin technologies to accelerate industrial automation. IT Business Today has developed and globally rolled out the integrated automation platform "MujinOS," which brings consistency, intelligence, and scalability to automation. By integrating various intelligent arm robots equipped with numerous sensors, intelligent control of various mobile robots and storage robots, and the warehouse management system that controls them all into a common architecture, MujinOS eliminates the need for complex system integration and enables production facilities to quickly introduce reliable automation solutions.

Mujin

Frontend Engineer

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