Staff Mobile Engineer, Spend Foundation

US - San Francisco · 3+ years experience · Full-time · Hybrid · Posted Oct 15, 2026

At a glance

Airwallex is the AI-native financial operating system for a real-time, intelligent economy. More than 675,000 businesses, including McLaren Racing, Qantas, SHEIN, and TikTok, use us, directly or through our platform partners, to run their financial operations or build and monetize financial products of their own.
We started in Melbourne in 2015 to build the infrastructure global commerce runs on. We're the regulated backbone behind global payments: not by accident, but by design. A decade plus, 85+ licenses, and a financial infrastructure spanning North America, Europe, the Middle East, and Asia-Pacific.
We're co-headquartered in San Francisco and Singapore, with more than 2,300 people across 27 offices. We hire builders with founder-level energy, people who move fast with good judgment, dig in with real curiosity, and make calls from first principles rather than waiting to be told what to do. Read our operating principles https://www.airwallex.com/en-us/operating-principles to see it in full.

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 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 and maintain shared libraries and frameworks (e.g. design system components, analytics, feature flags, experimentation, authentication, payments, 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.
Own and continuously improve our mobile CI/CD pipelines (e.g. GitHub Actions, Bitrise), reducing build times, flakiness, and friction in releasing features.
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.
Drive cross-squad projects from problem definition through to rollout and adoption while aligning stakeholders.
Provide technical mentorship and guidance to senior and mid-level engineers through design reviews, pairing, and coaching.

8–10+ years of experience building native mobile applications on iOS or Android, including at least 3+ years operating at a Senior or Staff level.
Deep expertise in iOS (Swift, SwiftUI, Combine, async/await) or Android (Kotlin, AndroidX, Jetpack, Coroutines, Hilt) with commercial knowledge of both platforms.
Proven track record leading cross-team technical initiatives and evolving mobile architectures.
Designs for testability and maintainability, writing high-quality automated tests and using coverage meaningfully.
Experience owning and improving mobile CI/CD pipelines (e.g. GitHub Actions, Bitrise), including build optimisation, test stability, and release workflows.
Demonstrated ability to influence without authority, aligning engineers, PMs, and designers around technical direction and making pragmatic trade-offs.
Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience.

Experience defining and driving a mobile platform roadmap, balancing foundational work with product delivery needs.
Prior ownership of shared mobile libraries or frameworks used by multiple product teams at scale.
Hands-on experience with design systems and component libraries on mobile.
Hands-on experience with analytics, experimentation, and feature flagging on mobile.
Hands-on experience with observability tooling (e.g. Crashlytics, Sentry, logging/metrics platforms).
Experience in domains such as payments, fintech, or B2B SaaS, especially where reliability, security, and regulatory requirements are critical.
Experience mentoring other senior engineers and playing a key role in hiring and growing mobile teams.
Contributions to the mobile community (open source, talks, blog posts) or evidence of thought leadership in mobile architecture and foundations.

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