ABOUT AIRWALLEX 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 250,000 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 2,300 of the brightest and most innovative people in tech across 27 offices around the globe. Valued at US$11 billion and backed by world-leading investors including T. Rowe Price, Visa, Mastercard, Robinhood Ventures, Sequoia, Salesforce Ventures, DST Global, and Lone Pine Capital, 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.   ATTRIBUTES WE VALUE We hire successful builders with founder-like energy who want real impact, accelerated learning, and true ownership. You bring strong role-related expertise and sharp thinking, and you’re motivated by our mission and operating principles. You move fast with good judgment, dig deep with curiosity, and make decisions from first principles, balancing speed and rigor. You're humble and collaborative; turn zero‑to‑one ideas into real products, and you “get stuff done” end-to-end. You use AI to work smarter and solve problems faster. Here, you’ll tackle complex, high‑visibility problems with exceptional teammates and grow your career as we build the future of global banking. If that sounds like you, let’s build what’s next.   About the team Airwallex’s Information Security team partners closely with engineering, IT, and other stakeholders to protect our systems, data, and employees while enabling the business to move quickly. The team helps build and maintain strong security practices across the company—from secure product and infrastructure design to risk reduction, incident response, audits, and compliance—so security is built into how we operate, not treated as a blocker. Your role As a Senior Security Engineer at Airwallex, you will be a trusted member of the Information Security team and work closely with Infrastructure, Product and Engineering teams across the business. Reporting directly to the Product Security Engineering Manager, this role will see you being a critical part of Airwallex, helping to identify, protect, detect, respond and recover the organisation from cybersecurity threats. This is a dynamic and hands-on role that requires experience in designing, developing and managing infrastructure projects, processes and standards related to the security of our networks, systems and applications. What you’ll be doing * Partner with other teams within Airwallex to analyse new or existing applications, software, or services and help drive security improvements. * Design, develop, test, and evaluate new security controls for a rapidly growing business. * Perform incident response and hunt through log sources to identify new threats. * Design and implement custom detection strategies and workflows to support the incident response lifecycle. * Analyse and develop integration, testing, operations, and maintenance of secure systems. * Use data collected from a variety of endpoint, network and cloud tools (e.g. EDR, authentication, firewalls, network traffic logs) to analyse, identify and mitigate threats. * Design, test, implement, deploy and maintain cybersecurity infrastructure projects. * Investigate, analyse and respond to cybersecurity incidents within the Airwallex environment. * Perform assessments of systems and networks to identify deviations in configurations and policies, identify vulnerabilities and support suitable mitigation and remediation. * Conduct collection, processing, and/or geolocation of threats in order to exploit, locate, and/or track cybersecurity threats infrastructure. * Perform network navigation, tactical forensic analysis, and defensive operations. * Identify, collect, examine, and preserve digital forensic evidence using analytical and investigative techniques. Minimum Qualifications (must-have) * 5+ years working in a security engineering or incident response role within a tech company * In depth experience with at least one major cloud platform * Strong knowledge of common software development tools and infrastructure, including CI/CD tooling and pipelines * Comprehensive understanding of common attacker tools and techniques, how they can be detected and prevented, and ability to respond to incidents with high depth and quality of investigation * Strong communication skills with the ability to explain technical security and software concepts to a non-technical audience * A passion for solving the complex challenges of high-growth startups * Self motivation and drive to learn new skills, or dive deeper into existing skills Highly Desired * Bachelor's degree in Cybersecurity, Computer Science or similar * Recognised training or cybersecurity certifications (eg OSCP, GIAC, CEH) * Strong experience with Splunk and other common security monitoring tools * Past DevOps/SRE experience with Kubernetes * Experience with GCP or Alibaba Cloud (with or without certification) * Experience with Okta, GSuite, and cloud-based VPN services * Experience with Python, Java/Kotlin * Published articles, journals or blogs related to cybersecurity APPLICANT SAFETY POLICY: FRAUD AND THIRD-PARTY RECRUITERS To protect you from recruitment scams, please be aware that Airwallex will not ask for bank details, sensitive ID numbers (i.e. passport), or any form of payment during the application or interview process. All official communication will come from an @airwallex.com email address. Please apply only through careers.airwallex.com or our official LinkedIn page. Airwallex does not accept unsolicited resumes from search firms/recruiters. Airwallex will not pay any fees to search firms/recruiters if a candidate is submitted by a search firm/recruiter unless an agreement has been entered into with respect to specific open position(s). Search firms/recruiters submitting resumes to Airwallex on an unsolicited basis shall be deemed to accept this condition, regardless of any other provision to the contrary. EQUAL OPPORTUNITY Airwallex is proud to be an equal opportunity employer. We value diversity and anyone seeking employment at Airwallex is considered based on merit, qualifications, competence and talent. We don’t regard color, religion, race, national origin, sexual orientation, ancestry, citizenship, sex, marital or family status, disability, gender, or any other legally protected status when making our hiring decisions. If you have a disability or special need that requires accommodation, please let us know.