Application Security Engineer (Security Center)

2019.11.08 Japan

Location: Tokyo, JAPAN


*Click office name above to see exact location

Job Introduction


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.


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

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 

<An edge to have>

- Fintech or blockchain-related development or security testing experience

<Language Skills>

Ability to communicate in English or Japanese. Bilinguals are welcome.


- Performance-based

- Commuting Expenses / Fully Covered

- Five-day Workweek / Saturday & Sunday


- Health Insurance

- Employment Insurance

- Industrial Accident Compensation Insurance

- Employee Pension


- Paid Annual Leave

- Holidays

- New Years

- Wedding Leave

- Bereavement Leave

- Free Annual Medical Checkups

- Free Breakfast

APPLY NOW *This will take you to application format with English description

*Details to be discussed at the interview