This position is closed and is no longer accepting applications.

Application Security Engineer, Security Center

LINE Corp. Shinjuku-ku, Tokyo
  • πŸ’΄ No salary range given
  • 🏑 Partially remote
  • πŸ§ͺ Minimum years of experience unspecified
  • πŸ’¬ Fluent Japanese
  • 🌏 Apply from abroad
  • 🧳 Relocate to Japan

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


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

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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