Senior Backend Engineer, Liquidity Platform (Fintech)

Location: Singapore; in-office five days a week

Company

Airwallex provides financial infrastructure, payments, and financial operating systems for businesses operating across global markets.

What you will do

• Design, build, and own backend services for liquidity management, safeguarding, investment workflows, and cash data management.
• Develop scalable systems for liquidity forecasting, cash positioning, internal fund movement, funding optimisation, and operational decision-making.
• Improve the availability and efficiency of funds across entities, accounts, and currencies.
• Strengthen financial infrastructure through controls, reconciliation, observability, and auditability.
• Partner with Product, Treasury, Finance, Legal, Compliance, Risk, Data, and engineering teams from requirements and design through deployment and operation.
• Operate services using distributed systems, event-driven workflows, Kafka, gRPC, REST APIs, and SQL or NoSQL data stores.

Requirements

• 5+ years of experience building and operating backend systems in production.
• Strong experience with Kotlin, Java, or a comparable backend stack, with willingness to work primarily in the JVM ecosystem.
• Understanding of distributed systems fundamentals, including concurrency, consistency, idempotency, retries, backoff, and network failure modes.
• Experience designing REST and/or gRPC APIs and working with relational databases such as PostgreSQL or key-value stores.
• Experience with event-driven architectures, message brokers or streams, testing, CI/CD, observability, and production debugging.
• Ability to work from the Singapore office five days per week and collaborate effectively with cross-functional partners.

Nice to have

• Experience in fintech, payments, treasury, banking, liquidity management, safeguarding, investment platforms, regulatory reporting, or financial data systems.
• Experience with auditability, reconciliation, financial controls, approval workflows, or financial correctness.
• Experience with data-intensive systems, cash-flow analytics, forecasting, reporting, or operational dashboards.
• Experience designing platforms for multiple markets, currencies, entities, or regulatory environments.

Culture & Benefits

• In-person collaboration in the Singapore office.
• Ownership of roadmap and outcomes with autonomy in ambiguous problem spaces.
• Direct, respectful collaboration and a strong focus on quality, accountability, and operational excellence.
• Opportunity to build AI- and agent-native financial infrastructure on a global platform.