This position is closed and is no longer accepting applications.

Infrastructure Security Engineer

LINE Corp. Shinjuku-ku, Tokyo
    💴 No salary range given
    🏡 Partially remote
    🧪 Minimum years of experience unspecified
    💬 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

Infrastructure security team is a global engineering team that designs, builds and operates LINE entire cyber infrastructure.


  • Review, build, operate and improve measures to protect large-scale service infrastructure and business environment infrastructure
  • Design and implementation of new service security architecture
  • Provide security guides to engineers, business teams and partners involved in various LINEs
  • Enforce security checks on LINE infrastructure and improve methods
  • Security automation


  • Risk assessment and automation
  • Vulnerability-based infrastructure risk assessment (experience on Enumeration standards such as CVSS Scheme and CPE)
  • Threat-based infrastructure risk assessment
  • Security Warranty
  • Enhancing security vulnerabilities
  • Hardening design/implementation for Server OS (Linux/Windows), Client OS, Service Platform, Open Source
  • Access Control for Linux (RHEL, CentOS), Windows environments (IAM, PAM, ZeroTrust, AD, LDAP)
  • Review, build, operate and improve protection measures (Security Platform DevSecOps)
  • Security automation
  • Review, build, run and improve Endpoint Security
  • Review, build, run and improve System/Data Security
  • Review, build, operate and improve Key Management (SSL/TLS Certificates, KMS, HMS)
  • Review, build, run and improve Security Management (Elastic Stack, Splunk, etc.)
  • Experience of the role of security architect
  • Security architecture design and implementation for new services
  • Security-related standards-based security operations
  • ISO27001, SOC, PCI-DSS, SOX

Nice to haves

These aren’t required, but be sure to mention them in your application if you have them.

  • Design, construction and operation of various service infrastructure environments
    • Public Clouds (AWS, GCP, Azure, etc.)
    • Private cloud (i.e. OpenStack and other IaaS technologies, Kubernets and Container technologies like Docker)
    • Large infrastructure (tens of thousands or more)
  • A master’s degree in computer science or related fields
  • Use two or more of the following languages at the business level: Japanese, English, Korean, Chinese

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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