Senior Backend Engineer, Liquidity Platform

About the role

Airwallex, the AI-native financial operating system used by more than 675,000 businesses, is hiring a Senior Backend Engineer for its Liquidity Platform in Singapore. You will design, build and own backend services that help Airwallex manage funds efficiently, securely and intelligently across global entities, accounts and currencies. This is an in-office role, five days a week.

Key responsibilities

• Build scalable systems for liquidity forecasting, cash positioning, internal fund movement, safeguarding, investment workflows and operational decision-making.
• Improve the availability and efficiency of funds across entities, accounts and currencies.
• 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 through implementation, testing, deployment and operation.
• Own services end-to-end using distributed systems, event-driven workflows, Kafka, gRPC, REST APIs and SQL or NoSQL data stores.

Required profile

• 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, with a willingness to work primarily in the JVM ecosystem.
• Solid understanding of distributed systems fundamentals: concurrency, data consistency, idempotency, retries, backoff and failure modes.
• Experience 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.
• Strong focus on testing and quality, including unit, integration and contract tests, with familiarity with CI/CD pipelines.
• Good grasp of observability, including metrics, logging, tracing and alerting.
• Clear written and verbal communication, able to collaborate with cross-functional partners in a fast-paced environment.
• Comfortable owning the roadmap and working in person five days a week.

Preferred

• Fintech, payments, treasury, banking, liquidity management, safeguarding, investment platforms, regulatory reporting or financial data systems experience.
• Experience with auditability, reconciliation, controls, approval workflows or financial correctness.
• Data-intensive systems, cash flow analytics, forecasting, reporting or operational dashboards.
• Knowledge of cash positioning, fund movement, bank account structures, entity-level liquidity, safeguarding, investment limits or cash optimisation.
• Platforms supporting global operations across multiple markets, currencies, entities or regulatory environments.