Mobile Engineer, Foundation

Staff Mobile Engineer

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.

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.

You will:

• 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 rotation for critical platform-level incidents, ensuring rapid response and resolution.

  • Define, document, and enforce mobile engineering best practices across the organization to maintain a high bar for code quality and platform consistency.

• Lead cross-team technical initiatives

  • Drive cross-squad projects…