Backend Software Engineer (Go)

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. A Quick Overview of What This Role Entails Mujin Portal is a cloud-based product that enables customers and Mujin engineers to manage and support Mujin robotic systems deployed across multiple sites. With Portal continuing to expand, the team is focused on both new product capabilities and scaling the platform to support a growing fleet of connected Mujin Controllers. This includes areas such as controller connectivity and remote access, data synchronization and storage, backups, monitoring and dashboards, virtual controllers, and customer support workflows. As a Backend Software Engineer, you will design and develop backend services that power these capabilities. You will work with large volumes of data generated by connected robotic systems and take ownership of services and features from design through implementation and ongoing improvement. Responsibilities Design, develop, and maintain backend services for Mujin Portal using Go Build GraphQL APIs and services for managing fleets of connected Mujin Controllers Develop systems for collecting, synchronizing, storing, and processing Controller data Build secure remote access, authentication, and multi-tenant access control Design and improve backend architecture for scalability, reliability, and maintainability Independently own backend features or services from design through implementation and maintenance Minimum Requirements Hands-on experience designing and developing backend services in Go Strong experience with PostgreSQL or other relational databases, and data modeling Solid understanding of system design and software architecture Ability to independently own and deliver backend features or services Strong problem-solving and communication skills Preferred Requirements Background in building distributed or cloud-based backend systems Familiarity with concurrent or asynchronous programming Experience with GraphQL, WebSockets, or other real-time APIs Experience with authentication and authorization (OAuth 2.0, OIDC) and secure system design Hands-on exposure to Kubernetes and AWS or other major cloud platforms Experience with IoT, robotics, or systems connecting cloud software with physical devices 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