9 months ago
Tokyo, JapanMid Level
Responsibilities
- Build and ship React Native features for Android and implement user interfaces from designs and product requirements.
- Develop and maintain Android applications for industrial devices using device hardware integrations and vendor-specific SDKs.
- Develop responsive, accessible React and TypeScript web frontend applications for warehouse operations and management interfaces.
- Integrate applications with REST and GraphQL backend APIs, authentication, and analytics.
- Debug and resolve issues across devices, operating systems, applications, and hardware layers.
- Optimize application and frontend performance, responsiveness, bundle size, and browser behavior.
- Build applications optimized for offline usage, long-running sessions, and high reliability.
- Write tests, contribute to CI/CD and release processes, participate in code reviews, and improve code quality through refactoring.
- Collaborate with product managers, designers, backend engineers, and operations teams to deliver end-to-end features.
- Triage and resolve production issues across Android and web systems and participate in knowledge sharing and mentoring.
Requirements
- At least 3 years of professional software development experience.
- Strong knowledge of JavaScript, TypeScript, React, preferably React Native, and CSS.
- Experience integrating applications with device hardware features or SDKs.
- Experience with testing frameworks and CI/CD pipelines.
- Solid understanding of software engineering fundamentals and performance optimization.
- Preferred: experience developing Android applications with Kotlin and applications for industrial devices.
- Preferred: experience maintaining shared frontend libraries or component systems and monitoring or optimizing frontend performance.
- Preferred: familiarity with PixiJS, rich animations, interactive user interfaces, offline-first design, data synchronization, Figma plugin development, and internationalization/localization workflows.
Benefits
- Tokyo-based work at 8:45–17:45 with a 60-minute break; Saturdays and Sundays are holidays.
- Annual paid leave, maternity and childcare leave, flexible holidays, and other company holidays.
- Visa sponsorship, Japan relocation support, flight ticket support, shipping expense coverage up to a specified limit, and housing assistance.
- Commuting allowance and Japanese social security covering health insurance, pension, and labor insurance.
- Free buffet lunch on workdays, free vending machines, a high-end coffee machine, monthly team dinner support, and exclusive employee gym access.
- Flexible dress code and salary reviews twice a year; performance bonuses may also be available.
Tech Stack
Categories
FrontendMobile
About Mujin
Mujin builds the MujinController platform and turnkey robotic systems that combine 3D vision, motion planning, and real‑time control to automate logistics and manufacturing tasks such as picking, palletizing, and material handling. It sells software and integrated automation cells to warehouse and factory operators. Founded in 2011 and headquartered in Tokyo, the privately held company operates globally, with subsidiaries in the United States and Europe.