Mobile Engineer, Foundation

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.

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.

As a Staff Mobile Engineer on the Mobile Foundations team, you will lead the technical direction of our mobile platform across iOS and Android. You will design and evolve the core architecture, own critical shared components, and act as a multiplier for mobile engineers across product teams.

• Define and evolve mobile architecture
  • Lead the design and evolution of the shared architecture for our native mobile apps, including navigation, state management, networking, offline strategies, and error handling.
  • Drive modularisation and clear boundaries between foundation modules and product features.
• Own core mobile platform capabilities
  • Own and maintain shared libraries and frameworks (e.g. design system components, analytics, feature flags, experimentation, authentication, payments, observability).
  • Be responsible for the application's authentication and authorization mechanisms.
  • Ensure these components are stable, well‑documented, and easy to adopt and extend by product teams.
• Improve security, reliability, performance, and observability
  • Drive mobile application security, including anti‑tampering measures, certificate pinning, and security best practices.
  • Define and track platform‑level metrics such as crash‑free sessions, ANRs, app start‑up time, bundle size, and network performance.
  • Partner with product teams to drive initiatives that improve reliability, performance, and overall mobile quality.
  • Strengthen end‑to‑end observability across mobile (logging, metrics, tracing, crash reporting) and use data to guide priorities.
• Elevate developer experience, CI/CD
  • Own and continuously improve our mobile CI/CD pipelines (e.g. Git Hub Actions, Bitrise), reducing build times, flakiness, and friction in releasing features.
  • Improve developer experience for mobile engineers through tooling, templates, documentation, and automation.
• Manage Mobile Release, Operational Health, and Best Practices
  • Own the end‑to‑end mobile release process across iOS and Android, ensuring timely and reliable delivery of new versions.
  • Establish clear guidelines and lead the on‑call…