Staff Software Engineer, GTPN Platform

About Airwallex Airwallex is the AI-native financial operating system for a real-time, intelligent economy. More than 676,000 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 to see it in full. About the Team The Global Treasury and Payment Network (GTPN) team sits at the core of Airwallex’s payment infrastructure. As Airwallex’s very first product and still the largest revenue driver across the company, GTPN underpins many of our most critical customer experiences. We operate at the intersection of traditional and modern finance, expanding the reach of our global treasury and payment network, strengthening its capabilities and reliability, and delivering innovative payment products built on a robust financial foundation. GTPN is a truly global, cross-site engineering organization, with talented engineers in existing and emerging hubs such as the US, Singapore, Hong Kong, and Shanghai. As we continue to scale worldwide, we’re looking for passionate Senior Software Engineers to join us. You’ll collaborate closely with product managers, designers, and engineers across regions to build and enhance products that not only meet but exceed our customers’ expectations. Why Join Us Be Part of Something Big: Join a team that's redefining the future of finance. Your work will have a direct impact on our mission to revolutionize financial services and help millions of businesses grow globally. Grow With Us: At Airwallex, we're committed to your professional development. You'll have opportunities to learn, grow, and shape your career path in a fast-paced, innovative environment. Collaborate With the Best: Work with a team of talented and passionate individuals who are driven by the desire to create something extraordinary. What You’ll Do: Architect distributed payment systems at global scale: Design and evolve the core infrastructure spanning real-time local clearing, SWIFT, and proprietary treasury routing across 150+ countries. Solve hard financial integrity problems: Build idempotent, fault-tolerant systems that handle multi-currency reconciliation, async settlement, and compensation logic across unreliable banking partners. Own reliability and observability of the payment network : Define SLAs, design for graceful degradation during partner outages, and build the observability layer that surfaces payment health in real time. Use data to drive platform decisions: Leverage payment telemetry to optimise routing, identify bottlenecks, and measure the impact of infrastructure changes on settlement speed and conversion. Contribute to technical direction across a global team: Drive design reviews and RFC processes for platform-wide changes, collaborating across engineering hubs in the US, Singapore, Hong Kong, and Shanghai. Who you are We are looking for staff engineers with deep technical expertise and a strong track record of impact as a tech lead. Minimum qualifications: Experienced and Technically Proficient: You possess a wealth of experience in system architecturing and software development, with 7+ years working in modern engineering practices focused on continuous innovation and high-quality engineering. A Technical and Talent Bar Raiser: You set high standards and lead b