Senior Security Engineer, Insider Risk

Airwallex • San Francisco, CA

49d

About The Position

Airwallex is the only unified payments and financial platform for global businesses. Powered by our unique combination of proprietary infrastructure and software, we empower over 150,000 businesses worldwide – including Brex, Rippling, Navan, Qantas, SHEIN and many more – with fully integrated solutions to manage everything from business accounts, payments, spend management and treasury, to embedded finance at a global scale. Proudly founded in Melbourne, we have a team of over 1,800 of the brightest and most innovative people in tech across 26 offices around the globe. Valued at US$6.2 billion and backed by world-leading investors including Visa, Airtree, Blackbird, Sequoia, DST Global, Greenoaks, Salesforce Ventures, Lone Pine, and Square Peg, Airwallex is leading the charge in building the global payments and financial platform of the future. If you’re ready to do the most ambitious work of your career, join us. As a Senior Security Engineer focused on insider and fraud threats within the Information Security Engineering team, you will be pivotal in protecting Airwallex’s $200b+ payments ecosystem, our customers, and our global workforce. Your mandate centers on identifying, investigating, and challenging threats from both internal and external actors. You will be challenged to: Design, develop, and maintain advanced detection rules and automated response mechanisms to surface insider and fraud risk, using a mix of behavioral analytics, anomaly detection, and rule-based logic. Deep-dive into user, system, and financial data to uncover complex fraud tactics and potential abuse by insiders or privileged users. Contribute insight into evolving fraud trends and trusted insider behaviors, strengthening Airwallex’s proactive security stance through continuous learning and agile solutioning. Mentor peers on advanced detection strategies, fraud taxonomy development, and the broader fraud/insider threat lifecycle, fostering technical depth on the team.

Requirements

• Bachelor’s degree in Computer Science, Information Security, or relevant field.
• 7+ years of hands-on experience in security engineering or detection engineering, with a strong focus on insider threat or fraud risk (ideally in financial or high-growth technology settings).
• Direct experience building, tuning, and operating detection and monitoring solutions (e.g. SIEM, EDR, DLP, user behavior analytics, and fraud detection platforms).
• Expertise designing and implementing DLP controls and correlating exfiltration techniques with insider scenarios.
• Working knowledge of modern cloud-native architectures and how they impact identity, access, and monitoring.
• Experience with coordinating incident response and digital forensics.

Nice To Haves

• Experience within Fintech, payment, or regulated environments handling substantial fraud or insider risk volumes.
• Strong background in digital forensics, transaction analysis, and linking forensic evidence to potential business impact.
• Understanding of regulatory requirements, compliance best practices, and incident disclosure obligations for financial institutions.

Responsibilities

• Lead the creation and tuning of high-efficacy detection signatures and analytics across SIEM, EDR, DLP, and payment monitoring platforms, focusing on both technical threats and nuanced abuse scenarios.
• Support relevant incident response and digital forensics efforts.
• Identify and mitigate the risk of issues such as account misuse, privilege escalation, and social engineering within the organization.
• Collaborate with fraud analysts, KYC operations, compliance, and the broader security team to improve high-risk workflows (onboarding, KYC,authentication, funds movement).
• Create, maintain, and operationalize detection logic for insider and fraud scenarios.
• Share domain best practices in threat modeling and detection with the engineering team, actively supporting others’ development in fraud and insider risk domains.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 1,001-5,000 employees