About LINE Corp.

Shinjuku, 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

Responsibilities

Ensure the security and quality of a wide range services and products developed by LINE and group companies. Platforms and technologies include Web, mobile, desktop, IoT, Fintech, and more.

Major Responsibilities

  • security consulting at the planning and design stage
  • security testing and risk assessment
  • abuse analysis and prevention
  • LINE Security Bug Bounty operation

LINE Application Security Team Profile

  • We strive to perform most security tasks in-house, and employ security engineers full-time.
  • Security engineers get full access to source code, and can communicate directly with developers and product owners.
  • Security engineers are free to choose and build their tools: we employ both open source, commercial, and in-house security tools and solutions.
  • We value speed, efficiency, and direct communication. High-overhead risk and vulnerability reporting is generally unnecessary.
  • We support and encourage OSS contributions, CTF participation, journal publishing and conference participations in the fields of computer security and science.

Preferred Qualifications

  • software engineering experience
  • contributions to OSS projects, especially related to security
  • high-profile CTF participation
  • presentations and publications in the fields of computer security
  • Experience in of the following
    • design, development, or security review of large-scale software systems
    • security testing and vulnerability reporting for Web, mobile, or IoT applications/devices
    • large-scale log analysis and pattern/anomaly detection

An edge to have

  • Fintech or blockchain-related development or security testing experience

Language Skills

Ability to communicate in English or Japanese. Bilinguals welcome.

Meet LINE Corp.'s Developers

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...

Joining LINE from overseas

with Li Liu

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...

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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About LINE Corp.

Shinjuku, 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

Other Jobs at LINE Corp.

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