This position is closed and is no longer accepting applications.

Software Engineer in Test

LINE Corp. Shinjuku-ku, Tokyo
    💴 No salary range given
    🏡 Partially remote
    🧪 Minimum years of experience unspecified
    💬 Fluent Japanese
    🗾 Japan residents only
    🧳 No relocation support

About LINE Corp.

LINE Corp. Shinjuku-ku, Tokyo

At 83 million domestic users, or 65% of the population, LINE is Japan's most popular messaging application. It is also popular throughout Asia, boasting approximately 186 million users globally.

Key benefits

  • Build reliable systems at scale
  • Room to grow
  • Healthy work/life balance

About the position

We are looking for a Software Engineer in Test (SET) for leading Test Automation for microservices and Web APIs design, build, operation, and improvement of failure detection systems for microservices to support our services expanding and diversifying continuously on the LINE platform, home to over 83 million active users.

The SET will propose and implement improvements iteratively and incrementally to developer experience and LINE’s platform quality with Test Automation and DevOps.


  • Propose and coach product development teams on the best testing strategies and tools for a product
  • Develop and operate Test Automation tools and their environments
  • Develop and operate a service failure detection and recovery support system using Test Automation
  • Propose and implement business and process improvements using Test Automation

To learn more about the concrete responsibilities and activities of SET, please refer to the presentation, “Build Self-Organized Team through Test Automation with Karate”.


At least one of the following skills and experience:

  • At least 5+ years of developing and operating server-side Web APIs and/or web applications with Java or Kotlin
  • At least 3+ years of developing and operating server-side applications with JavaScript (ES6 or later) or TypeScript
  • At least 3+ years of developing and operating client-side applications with Vue.js

At least 5+ years of skills and experience with the following:

  • Writing automated test scripts for Unit Testing and Integration Testing using JUnit or other xUnit frameworks
  • Building and operating a system to run automated test scripts on a CI server

Skills and experience with the following in relation to Test Automation:

  • TDD (Test-Driven Development)
  • Refactoring
  • Mock/Test Doubles

Experience with Agile, especially Scrum and Extreme Programming (XP)

Preferred Qualifications

  • At least 5+ years of experience building, writing, and operating the following Test Automation:
    • Web API tests (RESTful API, Thrift API, gRPC, etc.)
    • (Server-side) Service Tests and/or End-to-End Tests for microservices
    • (Client-side) End-to-End Tests for web applications and/or smartphone apps
  • At least 1+ years of experience building and operating Microservice Architecture applications with Docker and Kubernetes
  • Experience building, writing, and operating automated test scripts with BDD (Behavior-Driven Development) framework like Cucumber and/or Karate
  • Experience designing and conducting Performance Testing
  • Experience with open-source software (OSS) (Spring Boot, Maven, Gradle, MySQL, etc.)
  • Experience developing traffic-heavy websites (portal sites, e-commerce websites, online communities, etc.)
  • Experience identifying issues, and proposing and implementing solutions to them

Meet LINE Corp.'s Developers

Photo of Swapnali Koli

Joining LINE as a QA Engineer

with Swapnali Koli

Swapnali had been working at a Japanese company as a QA Engineer. Looking for a new challenge, she joined LINE, where she’s led their private cloud API automation project.

Read her story...

Li was working in Toronto when he was recruited to join LINE as a principal engineer. He tells his story of relocating to Japan.

Read his story...
Photo of Matthew Bailey

Growing a career in Japan

with Matthew Bailey

Starting as a server side engineer at LINE, Matt is now a software development manager. He shares his experiences of finding a job in Japan, and gives tips on how you can be successful at landing one too.

Read his story...

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