Senior Software Engineer, Issuing Platform

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 200,000 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 2,200 of the brightest and most innovative people in tech across 26 offices around the globe. Valued at US$8 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 https://www.airwallex.com/us/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 The issuing engineering team at Airwallex builds and operates core systems for card issuing, transaction processing, and settlement at global scale. The team owns mission-critical platforms that underpin Airwallex’s issuing products, with a strong focus on reliability, scalability, and compliance. Key areas of ownership include: - Cards: Customer-facing and internal systems for card lifecycle management, controls, and configuration. - Transactions: A global, high-throughput transaction processing platform designed for low latency, high availability, and resiliency. - Settlement: Clearance, settlement, and dispute workflows that ensure financial accuracy and scheme compliance. WHAT YOU’LL DO As a senior software engineer, you are a strong individual contributor who takes ownership of complex components and delivers high-quality systems in collaboration with your team. While you do not have direct reports, your impact will come from technical execution, sound design decisions, and helping raise the quality and effectiveness of the team through example and collaboration. This role is based in Singapore. RESPONSIBILITIES: System design and implementation - Design, build, and operate backend services that support card issuing, transaction processing, and settlement. Contribute to the design of scalable, resilient systems in a distributed environment. Engineering quality and delivery - Write high-quality, well-tested code with a strong focus on maintainability and operational readiness. - Participate actively in code reviews, design discussions, and incident retrospectives. API and platform development - Design and implement RESTful APIs used by internal teams and external customers. - Ensure APIs are reliable, well-documented, and easy to integrate with. Collaboration and technical leadership - Work closely with engineers, product managers, and stakeholders across regions to deliver outcomes. - Mentor peer engineers through code reviews, pairing, and technical guidance. Operational excellence - Contribute to system reliability through monitoring, alerting, and on-call participation. - Identify and address performance, scalability, and resiliency issues proactively. WHO YOU ARE We're looking for peo