Software Engineer, Spend at Airwallex (Melbourne, Australia)Software Engineer, Spend

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 ouroperating principles to see it in full.

You’ll design and build backend services that power Airwallex’s global financial platform, with a focus on Spend and Accounting. You’ll work on services that help customers track, reconcile and account for spend transactions, ensuring financial data is accurate, reliable and compliant.

You’ll own features end to end, from technical design and implementation through to production operation, while helping shape the long-term architecture of our backend systems. You’ll partner closely with Product, Infrastructure and other Engineering teams, and help raise the engineering bar through high-quality code, thoughtful technical decisions and mentorship.

• Design and build scalable, secure backend services that support Spend and Accounting workflows.
• Shape the long-term architecture of backend systems that help customers track, reconcile and account for spend transactions.
• Deliver features from technical design and implementation through to reliable production operation.
• Improve system reliability, maintainability and observability through high-quality code and sound engineering practices.
• Partner with Product, Infrastructure and Engineering teams to deliver accurate, reliable and compliant financial experiences.
• Raise the engineering bar through technical mentorship and a strong focus on code quality.

You’ll work from our Melbourne office on Monday, Wednesday and Thursday.

Essentials

• A bachelor’s degree in Computer Science, Software Engineering or a related field.
• 2+ years of professional software engineering experience.
• Hands-on experience designing and building backend systems and APIs in production.
• Strong computer science fundamentals, including algorithms, data structures and distributed systems.
• Proficiency in at least one backend language, such as Java, Kotlin, Go or Python.
• Solid understanding of REST API design and backend frameworks, such as Spring Boot.
• Experience working with cloud infrastructure, such as AWS or GCP, and container orchestration, such as Kubernetes.
• A strong focus on performance, reliability and code quality.

• Familiarity with observability and monitoring tools, such as Grafana, Prometheus or Splunk.

You'll thrive here if

• You own the outcome and you don't wait for permission to fix what's broken.
• You're comfortable with ambiguity. Give you a problem, not a prescription, and you'll run with it.
• You connect dots across functions and hold the big picture without losing grip on the details.
• You ask "why" before jumping to "how."
• You simplify complexity rather than hiding behind it.

Learn more about your team The Spend team builds Airwallex's financial operating layer for modern businesses, bringing together corporate cards, expenses, bills, and procurement on top of our accounts, payments, and issuing infrastructure. We're building AI that makes real decisions about expenses, policies, and payments, aiming to get 95%+ of submissions down to one click, while every workflow still has to hold up across multi-entity businesses, currencies, and audit trails. This is a team for people who want broad ownership across product, data, and AI, while the roadmap is still being defined. If you want to build production AI for real financial workflows that directly change how businesses operate, this is where that work happens. Applicant Safety Policy: Fraud and Third-Party Recruiters To protect you from recruitment scams, please be aware that Airwallex will not ask for bank details, sensitive ID numbers (i.e. passport), or any form of payment during the application or interview process. All official communication will come from an @airwallex.com email address. Please apply only through careers.airwallex.com or our official LinkedIn page. Airwallex does not accept unsolicited resumes from search firms/recruiters. Airwallex will not pay any fees to search firms/recruiters if a candidate is submitted by a search firm/recruiter unless an agreement has been entered into with respect to specific open position(s). Search firms/recruiters submitting resumes to Airwallex on an unsolicited basis shall be deemed to accept this condition, regardless of any other provision to the contrary.

Airwallex is proud to be an equal opportunity employer. We value diversity and anyone seeking employment at Airwallex is considered based on merit, qualifications, competence and talent. We don’t regard color, religion, race, national origin, sexual orientation, ancestry, citizenship, sex, marital or family status, disability, gender, or any other legally protected status when making our hiring decisions. If you have a disability or special need that requires accommodation, please let us know.