Senior​/Software Engineer, Core Banking; Relocate to Singapore

Senior/ Staff Software Engineer, Core Banking (Relocate to Singapore)

Airwallex is the only unified payments and financial platform for global businesses. Powered by our proprietary infrastructure and software, we enable over 200,000 businesses worldwide—including Brex, Rippling, Navan, Qantas, SHEIN, and many more—to manage business accounts, payments, spend management, treasury, and embedded finance at a global scale. Proudly founded in Melbourne and operating globally from 26 offices, Airwallex is valued at US $8 billion and backed by investors such as T.

Rowe Price, Visa, Mastercard, Sequoia, Salesforce Ventures and others. Join us for the most ambitious work of your career.

We hire builders with founder‑like energy who want real impact, accelerated learning, and true ownership. You bring strong role‑related expertise, are motivated by our mission, and move fast with good judgment. You are humble, collaborative, and get stuff done end‑to‑end. Use AI to work smarter, solve problems faster, and tackle complex, high‑visibility problems with exceptional teammates.

The Core Banking Platform team powers Airwallex’s global operations by facilitating client wallet transactions and ensuring financial accuracy of client ledgers. Based in Singapore, our lean team delivers a robust, high‑performance distributed multi‑currency wallet platform that supports continuous growth of Airwallex products such as global transfers, payments, acquiring, card issuing, and lending.

• Lead the development of a transaction engine focused on scalability, financial accuracy, and adaptability.
• Build and maintain a distributed multi‑currency wallet platform, providing precise financial oversight for client ledgers.
• Collaborate across product and engineering teams to ensure alignment between technical solutions and business objectives.
• Innovate productivity‑enhancing tools and processes, exploring AI opportunities to improve engineering practices and system observability.
• Thrive in a collaborative, energetic team environment that encourages continuous learning.

• 5+ years experience in modern engineering practices focused on continuous integration/delivery and quality engineering.
• Commitment to producing high‑quality, well‑tested solutions.
• Strong computer science fundamentals and JVM‑based programming experience (Kotlin preferred).
• Systems design experience.
• Experience with high throughput, low latency, highly available distributed systems.
• Experience with API design best practices.
• Familiarity with HTTP, TCP/IP protocols and REST specifications.
• Mastery of Gradle/Maven or other build tools.
• Familiarity with Docker, Kubernetes.
• Fluent English communication skills.

• Experience in Kotlin/Scala.
• Asynchronous/reactive programming (RxJava, Akka, Spring Reactor, Vert.x).
• Kafka event streams.
• Experience with GCP, Alicloud or AWS (EC2, RDS, ELB, Cloud Front, etc) and Kubernetes.
• Operational tooling such as Splunk, New Relic, Stats
  
  D, ELK, Datadog, Prometheus.

Airwallex is proud to be an equal‑opportunity employer. We value diversity and consider candidates based on merit. We do not accept unsolicited resumes from search firms unless a formal agreement exists. Airwallex will not request bank details or sensitive  during the application or interview process. All official communication will come from an  email address. Please apply only through  or our official Linked In page.