Software Engineer, Business Accounts Engineering Engineering • Sydney APAC , Sydney Sydney

Airwallex; Sydney; Hybrid; AUD 120,000 - 180,000; Full time

Job summary

Airwallex in Sydney, Australia, is seeking a backend software engineer to help build services that connect Cash, Yield, Lending, and other product surfaces into a unified financial experience for businesses. You’ll deliver core financial workflows, moving funds between accounts and optimising liquidity.

The role emphasises writing high-quality code, testing, observability, and collaboration with product, infra, and design teams across countries, including flexible collaboration with global

Qualifications

• Professional experience building backend or full-stack software.
• Interest in learning Kotlin.
• Understanding of distributed systems concepts (scalability, latency, reliability).
• Experience with automated tests and software quality.
• Familiarity with cloud tech (AWS or GCP), plus Docker and Kubernetes.
• Experience with observability tools (Prometheus, Grafana, New Relic, or Splunk).
• Ability to collaborate with product, infra, design, and engineering teams.

Responsibilities

• Build reliable financial infrastructure and integration rails.
• Write high-quality, testable code and enhance observability and API design.
• Collaborate with Product, Infrastructure, Design, and engineering teams to translate complex requirements into simple experiences.
• Contribute to backend services and financial workflows from design to production.

Skills

Backend development

Kotlin interest

Distributed systems

Cloud (AWS/GCP)

Docker

Kubernetes

Observability tooling

Tools

Prometheus

Grafana

New Relic

Splunk

Job description

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 to see it in full.

How you'll make impact

You'll help build backend services that connect Cash, Yield, Lending, and other Airwallex product surfaces into a unified financial experience for businesses. You'll deliver core financial workflows, including moving funds between accounts, optimising liquidity, and responding to activity across payments, card spend, and collections.

• Build reliable financial infrastructure such as reconciliation controls, unit registries, investment ledgers, and integration rails.

• Write high-quality, testable code and contribute to observability, API design, and maintainable engineering practices.

• Partner with Product, Infrastructure, Design, and other engineering teams to turn complex financial requirements into simple customer experiences.

• Contribute to the delivery of backend services and financial workflows from design through production.

You’ll work from our Sydney office on Monday, Thursday, and Friday.

What we're looking for

Essentials

• Professional experience building and shipping software, ideally in a backend or full-stack engineering role.

• Experience with a backend programming language and an interest in learning Kotlin.

• Understanding of distributed systems concepts such as scalability, consistency, latency, and reliability.

• Experience writing automated tests and contributing to software quality.

• Familiarity with cloud technologies such as AWS or GCP, plus Docker and Kubernetes.

• Experience working with observability tooling such as Prometheus, Grafana, New Relic, or Splunk.

• Ability to collaborate effectively with Product, Infrastructure, Design, and engineering stakeholders.

Preferred

• Experience with Kotlin, Vert.x, Temporal, or Kafka.

• Experience integrating with external service providers or building API-based systems.

• Experience in financial services, lending, payments, credit, or another regulated environment.

• Experience building SaaS products or platforms.

You’ll thrive here if

• You're comfortable making decisions with incomplete information and moving quickly anyway.

• You own the outcome and you don't wait for permission to fix what's broken.

• You enjoy working closely with people across multiple countries and time zones as part of one connected, global team, including flexing your hours occasionally to make that connection work.

• You say what you mean. You're direct, but you lead with respect.

• You simplify complexity rather than hiding behind it.

Learn more about your team

The Business Accounts team is where Cash, Yield, Lending, and the rest of our product suite come together into one unified financial experience for businesses. We're building the intelligent orchestration layer that lets customers move funds between transactional, yield-generating, and lending accounts, optimize liquidity, and respond dynamically to activity across payments, card spend, and collections. The challenge is that this connective layer doesn't exist yet: as our product suite grows, customers need it to feel programmable and automated, not like a patchwork of separate accounts. This is a brand-new team at an early stage, so you'll shape the technical foundations of a core platform from the ground up. If you want ownership building the product that sits at the center of Airwallex's business customer experience, this is where that work happens.

Equal opportunity

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.