Backend Engineer, Financial Infra & Payments (Hybrid SYD)

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

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