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

  • Provide guidelines for and consult on LINE’s system and service architecture and design 
  • Develop security and authentication modules (e.g. FIDO and cryptography) for LINE’s services
  • Research and study emerging security standards and technologies


To learn more about the kind of work you’ll do, see our presentations “Strong customer authentication & biometrics using FIDO” and “BITBOX: How to Secure Cryptocurrency Exchange”.

Required Qualifications

  • Masters or equivalent work experience in relevant fields
  • 3+ years of relevant work experience
  • Experience programming in C/C++, Java, Python, etc.
  • Experience with two or more of the following:

    • Network protocols and secure network design
    • Web application and browser security
    • Android and iOS security
    • Security risk assessments and penetration testing
    • Authentication and access control; Applied cryptography and security protocols
    • Development of security tools, automation or frameworks

Preferred Qualifications

  • In-depth knowledge of AI technologies such as deep learning
  • Experience in developing authentication systems
  • In-depth knowledge of security vulnerabilities and hacking
  • Knowledge of service operations

Language Skills

Ability to communicate in English, Japanese, or Korean. Bilinguals welcome.

Meet LINE Corp.'s Developers

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...

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...

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...

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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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