Senior Backend Engineer, Liquidity Platform

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 2,300 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.

How you'll make impact

You’ll design, build and own backend services that help Airwallex manage funds efficiently, securely and intelligently across global entities, accounts and currencies. You’ll build scalable systems for liquidity forecasting, cash positioning, internal fund movement, safeguarding, investment workflows and operational decision-making.

• Build reliable backend services for liquidity management, safeguarding, investment workflows and cash data management.

• Improve the availability and efficiency of funds across entities, accounts and currencies.

• Deliver scalable systems for liquidity forecasting, cash positioning, internal fund movement, funding optimisation and operational decision-making.

• Strengthen financial infrastructure through robust controls, reconciliation, observability and auditability.

• Partner with Product, Treasury, Finance, Legal, Compliance, Risk, Data and other engineering teams to take features from requirements and design through implementation, testing, deployment and operation.

• Own services through the full lifecycle, using distributed systems, event-driven workflows, Kafka, gRPC, REST APIs and SQL or NoSQL data stores.

This is an in-office role — you'll be in our Singapore office five days a week.

What we're looking for

Essentials

• 5+ years of experience building and operating backend systems in production.

• Strong programming experience in one or more JVM languages, such as Kotlin or Java, or a comparable backend stack, and a willingness to work primarily in the JVM ecosystem.

• A solid understanding of distributed systems fundamentals, including concurrency, data consistency, idempotency, retries, backoff and failure modes in networked services.

• Experience designing and working with REST and/or gRPC APIs, and persistence layers using relational databases, such as PostgreSQL, and/or key-value stores.

• Proficiency with event-driven architectures and message brokers or streams, such as Kafka or similar technologies.

• A strong focus on testing and quality, including unit, integration and contract tests, with familiarity with CI/CD pipelines.

• A good grasp of observability, including metrics, logging, tracing and alerting, and how to use them to debug production issues.

• Clear written and verbal communication skills, with the ability to work comfortably with cross-functional partners in a fast-paced environment.

Preferred

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