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Airwallex Logo Airwallex · IT - Software Development

Senior Backend Engineer, Billing

Singapore, Singapore · Job Posted February 21, 2026
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Job Description

The Billing Team at Airwallex is at the forefront of transforming how businesses handle pricing, billing, and invoicing. Our mission is to create a seamless, scalable, and transparent billing platform that not only supports Airwallex's growth but also empowers our customers to easily manage their billing needs. We envision a future where our billing platform not only supports Airwallex internally but also serves as an easy-to-integrate product for our customers. By joining our team, you play a crucial role in realizing this vision, working alongside talented professionals to deliver business-critical features and solutions. Together, we will build the next-gen billing solution that empowers businesses worldwide.

Job Responsibility

  • Lead the planning, design, and implementation of the Airwallex engineering system
  • Work with the business/product team to deeply understand the business needs, scenarios, and subsequent development directions, complete system analysis, architecture design, and core function development, and be able to grasp the design of complex systems to ensure the quality of complex architecture
  • Design and develop components based on the company's microservice framework
  • Introduce innovative technologies and innovative solutions for the team
  • Responsible for the construction and management of the technical team, and establish good internal coding standards

Requirements

  • More than 5 years of Core Java development
  • More than 5 years of experience in Internet application / large financial system / e-commerce platform development
  • More than one year experience in payment platform development
  • Bachelor degree in computer science and related majors
  • Proficient in Java 8, familiar with Java multi-threading, high concurrency, IO / NIO, network communication, etc.
  • Familiar with commonly used design patterns, with experience in design and development of large-scale distributed, high concurrency, high load, high availability systems
  • Master various common server technologies, which can optimize service response and data query, ensure various service quality, and solve the problems of high concurrency and high availability
  • Familiar with Spring / Spring Boot
  • Familiar with HTTP, TCP / IP protocol and REST specifications
  • Master Gradle / Maven and other build tools
  • Familiar with the use of Docker cluster
  • Familiar with JSON & XML

Nice to have

  • International clearing and settlement / foreign exchange transactions
  • Fluent in English
  • Cassandra / Redis / NoSQL / Hadoop
  • Kotlin / Scala / Python / Golang / R
  • Docker Swarm / Kubernetes
  • JavaScript / Angular / React / CSS3
  • Aliyun Cloud / AWS
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