Release Engineer

About the Role
Mujin is hiring a DevOps Engineer for the DevOps team. The team is currently small, and you will play a key role in managing and improving our CI infrastructure and build system.

Responsibilities

- Help improve and evolve existing end‑to‑end release processes and workflows

- Participate hands‑on in release-stage integration and regression QA

- Help define and uphold release quality gates together with developers and QA

- Work with stakeholders to better understand our end users' needs for issue tracking and management and help improve and maintain the issue tracking tools/systems and workflows

- Help improve release notes and release visibility by understanding how users consume releases and implementing improvements to increase adoption and usage awareness

- Drive practical AI usage in release workflows (e.g. release note drafts, change aggregation)

Minimum Requirements

- 5+ years of hands‑on experience in Release Engineering or similar roles (e.g. Release Engineer, Product Enablement, DevEx, release‑focused DevOps)

- Practical experience designing and running real production release workflows

- Strong understanding of system‑level testing and release QA

- Experience working with planning or tracking tools (e.g. Jira or equivalents)

- Comfortable working cross‑functionally and owning ambiguous initiatives

Preferred Requirements

- Experience with AI tools in software delivery or documentation workflows

- Background in environments with remote or limited deployment control

Interview Process:

- Resume Screening

- Take-home coding test

- HR interview

- Technical interview

- Culture/Team fit interview

Attractives

- Own and define the release function rather than inherit a fixed framework

- High impact on developer productivity and product quality

- Hands‑on role with strong influence across engineering, QA, and documentation

- Opportunity to bring AI into real, production release workflows

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