Full-stack Engineer (Java/Kotlin/JS/Typescript/Node.JS: 4220)

Job Type
JPY 3,400 - JPY 4,000 per hour
Japanese Level
English Level
Advanced (TOEIC 860)
Start Date


The Mobile Platform Innovation Section is building components and services allowing developers to quickly build apps for Android and iOS.

We are looking for someone willing to build exciting and high quality services, push the boundaries of technology and use their creativity to excite the engineering community. The work will be involved with a messaging service for mobile applications. This consists of a front-end and API component.



The candidate is expected to:

- Design and develop web application features including back-end (API) and front-end (UI)

- Work with engineers in an agile team and promote collaboration between other teams

- Validate and improve the code quality

- Participate in the mid and long term product vision with focus on technical optimization R&D activity for new technologies

- Document and test written code

- Mentor and guide junior developers or peers

- On-call support (troubleshoot, diagnose, and fix) for production and staging environment issues


【会社概要 | Company Details】

Our client is a large global Internet service company that has enjoyed sustained growth as they continue to expand their business in various new areas and industries. This is a great opportunity to work in a diverse and international environment in Japan. Our client actively strives to be an equal opportunity employer, and they have many female and foreign nationals in upper management positions. Their brand has also gained global recognition as they sponsor some of the world's most famous sports teams. Our client prides themselves in providing a comfortable working environment for their employees. Engineers are welcome to choose their own setup (Windows/Mac, etc.); whatever makes them comfortable! Free meals are also provided at the company cafeteria. Their chefs work to create exciting new menus and dishes, so employees never get tired of the food!
【就業時間 | Working Hours】
9:00 - 17:30(Mon - Fri)
【休日休暇 | Holidays】
Saturday, Sunday, and National Holidays, Year-end and New Year Holidays, Paid Holidays, Other Special Holidays
【待遇・福利厚生 | Services / Benefits】
各種社会保険完備(厚生年金保険、健康保険、労災保険、雇用保険)、 屋内原則禁煙(屋外に喫煙所あり)、 通勤交通費支給等
Social insurance, Transportation Fee, No smoking indoors allowed (Designated smoking area), etc.


Required Skills

- Professional experience in API development:

- Knowledge of good REST API Design and practices

- Experience with micro-services

- Experience in one or both:

- Java/Kotlin + spring development

- JavaScript/Typescript + Node.js express development

- Experience writing unit and integration test with JUnit or Jest

- Experience with Docker and Kubernetes

- Experience in backend database/storage technologies:

- Relational (such as MySQL, PostgreSQL, etc)

- NoSQL (such as MongoDB, Cassandra)

- Experience with large scale systems with high performance and high availability

Preferred Skills

- Interest in Front-end web development with modern frameworks (react, Vue, Svelte)

- Familiarity with UNIX command-line

- Experience with mobile application development

- Experience with CI/CD tooling (e.g. TeamCity, Jenkins, CircleCI, Travis)