Staff Mobile Engineer, Spend Foundation

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, 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. The Mobile Foundations team sits at the core of Airwallex’s mobile stack. We build and evolve the shared architecture, libraries, and tooling that power our fully native iOS and Android apps. Our apps help businesses manage global B2B payments, submit and approve expenses, and control both virtual and physical Airwallex cards—complete with seamless Apple Pay and Google Pay integration. On iOS, we work with Swift, SwiftUI, Combine, and async/await. On Android, we use Kotlin, AndroidX, Coroutines, Hilt, and the Jetpack ecosystem. Mobile Foundations is a platform / horizontal team: we don’t just build features, we create the building blocks that enable product squads to ship faster, more reliably, and with a consistent, high-quality user experience. This role can be based in Singapore, Melbourne, or San Francisco.