This position is closed and is no longer accepting applications.

Security Mobile Developer

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

In this position, you’ll be responsible for design, develop, and maintain client-side security modules for LINE messenger and other LINE applications. You will provide a safe and secure environment for LINE users, while complying with global security standards.

Major security features in scopes:

  • account and authentication
  • encryption
  • ID federation

The ideal candidate

  • is a strong team player
  • approaches tasks with positive, problem-solving attitude
  • is willing and capable to continuously learn and apply new skills and technologies


  • 3 or more years of Android or iOS development experience
  • understanding of basic security technologies (encryption, authentication, OAuth 2.0)
  • experience implementing or integrating FIDO, OAuth 2.0, OpenID Connect, or other authentication protocols

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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