Frontend Engineer（Android-heavy, React secondary）

Mujin creates MujinOS, the intelligent operating system for industrial robotics. By leveraging real-time digital twins, MujinOS seamlessly connects and orchestrates equipment to achieve fully autonomous operations.

At our core is  Machine Intelligence (MujinMI), a unique approach offering advanced perception, planning, and control algorithms that solve the most challenging automation problems.

Trusted by globally recognized companies, we are redefining supply chain efficiency. Headquartered in Japan with growing teams in China, the US, and Europe, we invite you to join a dynamic environment where you can shape the future of automation.

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.

- 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.

- 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.

- 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.

- Kotlin, React Native

- Android SDK, Android Jetpack

- AOSP-based devices, OEM SDKs

- TypeScript, React

- Rsbuild

- Vitest

- ESLint

- Python

- RESTful APIs

- GraphQL

- Docker

- Figma

- Confluence

- GitLab

 Android (core focus): Kotlin, device integration, reliability engineering

 Web Frontend: React + TypeScript for operational and management interfaces

・Free buffet lunch every workday

・Free vending machines (offering drinks and snacks)

・High-end coffee machine

・Exclusive Employee Gym Access