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 focus on developing user-facing Android and web frontend applications used daily in warehouse operations. Your work directly shapes how operators interact with warehouse systems through industrial Android devices and browser-based interfaces.

The team specializes in building reliable, high-quality frontends that run in demanding production environments, where stability, performance, and usability are critical. You will work closely with backend engineers, product managers, designers, and operations teams to deliver intuitive, responsive, and maintainable interfaces that support long-running workflows and mission-critical operations at scale.

Responsibilities

React Native

• Build and ship React Native features for Android
• Implement UI from designs and product requirements
• Integrate with backend APIs (REST/GraphQL), auth, and analytics
• Debug and fix issues across devices/OS versions; improve stability
• Optimize performance and app responsiveness
• Write tests and support CI/CD and release processes
• Participate in code reviews and maintain code quality through refactoring
• Collaborate with product, design, and backend teams to deliver end-to-end features

Android

• Design, develop, and maintain Android applications for industry devices used in warehouse environments.
• Implement features that interface directly with device hardware layers, including barcode scanners, cameras, physical buttons, NFC/RFID, printers, Bluetooth, and other peripherals.
• Work with vendor-specific SDKs.
• Debug and resolve issues across application, OS, and device layers.
• Build applications optimized for offline usage, long-running sessions, and high reliability.

Web Frontend

• Develop web frontend applications using React and TypeScript.
• Ensure applications are responsive, accessible, and work across browsers and devices.
• Optimize frontend performance through profiling, bundle size reduction, and effective use of browser APIs.

Collaboration & Quality

• Collaborate with Product Managers, Designers, backend engineers, and operations teams.
• Participate in code reviews, knowledge sharing, and mentoring.
• Triage, debug, and resolve production issues across Android and web systems.
• Contribute to CI/CD pipelines, testing, and code quality improvements.

Tech Stack

Android

• Kotlin, React Native
• Android SDK, Android Jetpack
• AOSP-based devices, OEM SDKs

Web Frontend

• TypeScript, React

Tooling & Build

• Rsbuild
• Vitest
• ESLint

Backend & Infrastructure

• Python
• RESTful APIs
• GraphQL
• Docker

Collaboration

• Figma
• Confluence
• GitLab

Minimum Requirements

Preferable Requirements

Attractiveness

Interview Process:

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