Senior Software Engineer Backend, Billing

About this role

ABOUT AIRWALLEX

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 2,700 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.

HOW YOU'LL MAKE IMPACT

Airwallex’s Billing team is building the next generation of billing infrastructure for Airwallex and the businesses that use our platform. You’ll help shape the architecture and deliver reliable backend systems that support complex financial workflows.

• Lead the planning, design, and implementation of backend systems for Airwallex’s billing platform.

• Partner with Product and business teams to understand customer and business needs, shape technical direction, and deliver core functionality.

• Build reliable components within a microservices architecture, including systems that support flexible pricing, invoicing, and quote-to-cash workflows.

• Own the architecture and development of complex, distributed systems with high concurrency, high availability, and strong financial accuracy.