Airwallex - Senior Backend Engineer, Liquidity Platform

• 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.