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

• Experience in fintech, payments, treasury, banking, liquidity management, safeguarding, investment platforms, regulatory reporting or financial data systems.

• Experience building systems that require strong auditability, reconciliation, controls, approval workflows or financial correctness.

• Experience working with data-intensive systems, cash flow analytics, forecasting, reporting or operational dashboards.

• Familiarity with financial operations concepts such as cash positioning, fund movement, bank account structures, entity-level liquidity, safeguarding, investment limits or cash optimisation.

• Experience designing platforms that support global operations across multiple markets, currencies, entities or regulatory environments.

You'll thrive here if

• You're comfortable owning the roadmap yourself.

• 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 hold yourself to a high standard even when no one is watching. Quality and accountability aren't external expectations, they're internal ones.

• You value in-person collaboration and are happy being in the office five days a week.

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

• You know when to align and when to just decide. Collaboration isn't a way to avoid accountability.

• You connect dots across functions and hold the big picture without losing grip on the details.

Learn more about your team

Engineering at Airwallex is for people who want to define a category, not maintain one. We're reimagining how businesses interact with finance from the ground up, AI- and agent-native by default, think agent wallets, agentic bookkeepers, and spend-management autopilots, with APIs designed for agents as first-class users. The hard part is trust: building agent-native systems precise enough to move real money autonomously, on top of a decade of real infrastructure. This is a team for engineers who'd rather own an unsolved problem than inherit a mature one. If you want frontier problems, teammates who raise your standards, and a genuine clean slate on world-class infrastructure, this is the place to build it.

#Singapore

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 @ email address. Please apply only through 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.

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.