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 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 1,700 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.

About the team

The Airwallex Information Security Team is a high calibre and highly proactive team that works across our infrastructure, app security, Corporate IT and broader engineering functions.

What you’ll do

As a Senior Detection Engineer in our Security Engineering team, you will be responsible for helping keep $200b+ in payments, 100,000s of customers, and our thousands of employees safe by designing, building, and maintaining robust detection capabilities. You’ll have the opportunity to dive deep into our security program, focusing on developing sophisticated detection rules, alerts, and automation to identify malicious activities and insider risks. You'll work with diverse data sources, optimize our telemetry, and contribute to a proactive security posture.

We’re not tied to specific projects, languages, and technology – we rely on smart people diving deep to find the best solutions to hard problems. You’ll also be mentoring junior team members and continuing to grow our world-class security engineering team.

Responsibilities:

• Lead the design, development, and implementation of high-fidelity detection rules, signatures, and behavioral analytics across various security tools (SIEM, EDR, DLP, etc.).

• Support incident response efforts by building and refining detection logic for threat hunting, incident identification, and automated response.

• Partner with engineering, IT, and security teams to identify visibility gaps and ensure comprehensive telemetry coverage across endpoints, identity systems, cloud infrastructure, and collaboration tools.

• Develop, refine, and operationalize threat indicators and scenarios for various attack vectors, including insider risk, fraud, and external threats.

• Build, monitor, and maintain underlying detection infrastructure, including data pipelines, serverless workloads, and Kubernetes clusters, ensuring efficient and scalable detection capabilities.

• Collaborate closely with security operations and incident response teams to translate investigative findings into actionable detections and improve alerting efficacy.

• Mentor and help grow other Software Engineers and Detection Engineers in the security team.

Who you are

• You have a passion for solving the complex challenges within a high-growth start-up.

• You are self-motivated, a self starter, and able to learn new skills and dive deeper into existing skills.

Minimum Qualifications

• Bachelor’s degree in Computer Science, Information Security, or a related field.

• 4+ years of experience as a Software Engineer, with a strong focus on security engineering, anomaly detection, security operations, or a related domain.

• Hands-on experience building or maintaining detection tooling and pipelines, including experience with SIEM, EDR, NDR, or SOAR technologies.

• Experience with production code bases and developing robust, scalable solutions.

• Experience with at least one scripting language (e.g., Python) and one systems programming language (e.g., Golang, C/C++).

• Experience with modern cloud infrastructure, including data pipelines, serverless workloads, and Kubernetes.

• Strong understanding of information security principles, practices, and technologies, with a particular emphasis on threat detection methodologies.

• Proven experience working autonomously on projects – delivering them to a high quality and on time.

• Excellent communication and interpersonal skills, with the ability to work effectively with both technical and non-technical stakeholders.

• Ability to dive deep to find the best solution to a problem.

• Obsessive curiosity and a willingness to ask questions, gather context, and learn.

Preferred Qualifications

• Experience working in a fintech or high-growth tech company.

• Hands-on experience with AI/ML, specifically leveraging these technologies to build and enhance security detection capabilities.

• Direct experience with DLP (Data Loss Prevention) control design and implementation.

• Experience with forensic analysis and correlating disparate data sources to uncover anomalous behavior.

• Experience maintaining Linux operating systems.

• Knowledge of security principles for cloud security, application security, and regulatory compliance requirements – you’ll be able to learn on the job too!

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.

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.