楽天グループ株式会社

You will be part of a diverse and passionate team of Offensive Security Experts, always looking for a way to get in but also for the best way to mitigate their findings. As cybersecurity professionals, we believe continuous growth and training are necessary to maintain up-to-date skills, so you will have many opportunities to level up your skills. Finally, Rakuten Group’s unique ecosystem will give you the chance to perform Penetration Testing and Red Team Engagements on a wide variety of technologies, applications and infrastructures.


■Key Responsibilities:
- Lead and Perform Penetration Testing activities on web applications, networks, mobile applications, and other systems.
- Lead and Perform Red Team exercises to simulate the latest sophisticated attack scenarios.
- Collaborate with the Blue Team and IT Administrators to improve Rakuten Group’s detection and defensive capabilities.
- Produce high-quality reports and deliverables catered to technical and non-technical audiences.
- Contribute to the Red Team’s knowledge and tooling base by investigating the latest Offensive Security tactics and techniques and developing tools and scripts.
- Actively contribute to the administration, management, and continuous improvement of the Red Team’s infrastructure.
- Provide mentorship and training to junior team members. 

Mandatory Qualifications
- Bachelor’s degree in Computer Science, Information Security, or a related field.
- Minimum of 3-5 years of experience in penetration testing and red teaming.
- Minimum of 3-5 years of experience in performing EDR evasion.
- Minimum of 3-5 years of experience in using, administering, and automating Offensive Security Infrastructure,
- Proficiency in scripting and programming languages (e.g., Python, PowerShell, Bash).
- Familiarity with various operating systems (Windows, Linux, macOS) and network protocols.
- Relevant certifications such as OSCP, OSCE, GPEN, GXPN, CRTO, GCFA, GCIH

Desired Qualifications:
- Experience performing Offensive Security testing against cloud environments (AWS, GCP, Azure).
- Experience or interest in performing Offensive Security testing against Generative AI systems and Large Language Models (LLMs).
- Familiarity with regulatory requirements and standards (e.g., GDPR, HIPAA, PCI-DSS).
- Fluent Japanese 

面談時にご確認ください 

正社員 

数多くの事業部があり、日本でも数少ないグローバルなWEB総合サービス企業の1社です。
デジタル人材専門エージェントであるウィンスリーは、数多くのデジタル人材の決定があり、強固なリレーションがあります。
楽天様の細かい求人情報、面接対策等はおまかせください。

楽天グループ株式会社

Senior Penetration Tester, Red Team Operations Group (CSDD)(1022709) 

289,674百万円 

1997年2月7日 

東京都世田谷区玉川一丁目14番1号 楽天クリムゾンハウス 

■Why We Hire
The Cyber Security Defense Department’s Red Team Operations Group is looking for a Senior Penetration Tester. The successful candidate will lead and perform various types of Offensive Security activities such as Penetration Testing and Red Team Engagements and will also be involved in developing and managing the Red Team’s resources such as tooling, infrastructure, etc. This role also entails close collaboration with key stakeholders to ensure that Rakuten Group’s security vulnerabilities are appropriately mitigated and its detection capabilities continuously improved. 

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