Security Engineer - Cybersecurity & IAM Fintech Tokyo

Join the CISO Office of a high-growth technology and financial services organisation as a Security Engineer, helping strengthen enterprise cybersecurity across a rapidly evolving digital and cloud environment.

Sitting within the Corporate Security function, this position works at the intersection of cybersecurity, identity and access management (IAM), endpoint security, network security, SaaS security, infrastructure security, and risk management. You will take a hands-on role in both operating security technologies and designing and continuously improving the organisation's wider security architecture and controls.

You will collaborate with global IT, engineering, infrastructure, and business teams to translate established cybersecurity frameworks and best practices into practical, scalable security solutions. With the organisation investing significantly in AI, automation, and next-generation digital services, this is an opportunity to help build security capabilities that protect the business while enabling continued innovation and growth.

Key Responsibilities

• Design, implement, and operate secure internal IT and corporate security environments in collaboration with global IT and security teams.
• Contribute to the architecture, implementation, and operation of Identity and Access Management (IAM) platforms, including Microsoft Entra ID / Azure AD and related authentication technologies.
• Manage and continuously improve enterprise security technologies, including EDR, CASB, and MDM solutions.
• Design, implement, maintain, and improve network security controls, including firewalls, IDS/IPS, and related security infrastructure.
• Assess and manage cybersecurity risks associated with internal systems, third-party applications, and SaaS platforms.
• Implement and operationalise recognised security frameworks and benchmarks, including the NIST Cybersecurity Framework and CIS Benchmarks.
• Apply security principles and controls across enterprise infrastructure, internal IT environments, endpoints, identities, networks, and cloud-based services.
• Collaborate with engineering, infrastructure, IT, and business stakeholders to embed security into technology projects and business initiatives.
• Balance security requirements, business risk, usability, and operational requirements when designing and implementing security controls.
• Contribute to the continuous automation, standardisation, and scalability of security operations.
• Work with regional and global teams to strengthen security architecture, controls, and operational practices across the organisation.
• Support the continuous improvement of the organisation's overall cybersecurity posture as its digital products and technology environment expand.

Required Skills and Qualifications

Experience:

• 5+ years of experience in information security, cybersecurity, IT security, or infrastructure security.
• Experience designing, implementing, or operating corporate IT and security environments.
• Hands-on experience with Identity and Access Management (IAM), including Microsoft Entra ID / Azure AD.
• Practical experience with enterprise security technologies such as MDM, EDR, or CASB.
• Experience with network security infrastructure and controls, including firewalls and IDS/IPS.
• Practical experience applying cybersecurity principles and controls across enterprise infrastructure and internal IT systems.
• Understanding of security risk management across internal systems, third-party applications, and SaaS environments.
• Experience applying or working with recognised cybersecurity frameworks and benchmarks such as NIST Cybersecurity Framework or CIS Benchmarks.
• Experience collaborating with IT, infrastructure, engineering, or business teams on security-related initiatives.

Soft Skills:

• Strong ownership and accountability for security outcomes.
• Business-oriented mindset with the ability to balance security, risk, usability, and business requirements.
• Strong problem-solving and decision-making skills with a pragmatic approach to complex cybersecurity challenges.
• Excellent stakeholder management and communication skills across technical and non-technical teams.
• Collaborative and adaptable working style, with the ability to work effectively with global teams and external partners.
• Continuous learning mindset with a strong interest in emerging cybersecurity, cloud, automation, and security technologies.
• Ability to build, improve, and scale security capabilities within a fast-changing technology environment.

Language Requirements:

• Japanese: Fluent
• English: Fluent

Preferred Skills & Qualifications

• Experience working within a fintech, financial services, technology, or cloud-based services organisation.
• Broader experience across multiple security domains, including IAM, endpoint security, network security, SaaS security, and infrastructure security.
• Experience improving or scaling Corporate Security capabilities within a high-growth technology organisation.
• Experience with security automation and the standardisation of security operations.
• Familiarity with cloud security and modern cloud-based enterprise environments.
• Exposure to security initiatives supporting AI, automation, or next-generation digital services.

About the Company

Our client is a high-growth technology and financial services organisation delivering digital products and cloud-based services to a large and growing customer base.

The Corporate Security function sits within the CISO organisation and works closely with global IT, engineering, infrastructure, and business teams to establish and continuously strengthen the company's cybersecurity posture.

Rather than treating cybersecurity purely as a defensive function, the organisation takes a risk-based and business-oriented approach to security, enabling innovation while protecting customers, employees, systems, and critical business assets.

The company is also entering an important phase of technological transformation, with significant investment in AI, automation, and next-generation digital services, creating new opportunities to design scalable and modern security capabilities.

Why You'll Love Working Here

• Join the CISO Office and directly contribute to strengthening cybersecurity across a growing technology organisation.
• Work across a broad and modern security environment spanning IAM, Entra ID, EDR, CASB, MDM, network security, SaaS security, and risk management.
• Go beyond day-to-day security operations and contribute to security architecture, controls, automation, and continuous improvement.
• Partner with IT, engineering, infrastructure, and business stakeholders as a trusted security advisor.
• Collaborate with regional and global teams in an international environment.
• Help build and scale cybersecurity capabilities as the organisation continues to grow.
• Work within an organisation investing in AI, automation, cloud technologies, and next-generation digital services.
• Receive competitive compensation.

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