Backend Engineer II, Billing

About Airwallex Airwallex is the only unified payments and financial platform for global businesses. Powered by our unique combination of proprietary infrastructure and software, we empower over 150,000 businesses worldwide – including Brex, Rippling, Navan, Qantas, SHEIN and many more – with fully integrated solutions to manage everything from business accounts, payments, spend management and treasury, to embedded finance at a global scale. Proudly founded in Melbourne, we have a team of over 1,800 of the brightest and most innovative people in tech across 26 offices around the globe. Valued at US$6.2 billion and backed by world‐leading investors including Visa, Airtree, Blackbird, Sequoia, DST Global, Greenoaks, Salesforce Ventures, Lone Pine, and Square Peg, Airwallex is leading the charge in building the global payments and financial platform of the future. If you're ready to do the most ambitious work of your career, join us. Attributes We Value We hire successful builders with founder‐like energy who want real impact, accelerated learning, and true ownership. You bring strong role‐related expertise and sharp thinking, and you're motivated by our mission and operating principles. You move fast with good judgment, dig deep with curiosity, and make decisions from first principles, balancing speed and rigor. You're humble and collaborative; turn zero‐to‐one ideas into real products, and you "get stuff done" end‐to‐end. You use AI to work smarter and solve problems faster. Here, you'll tackle complex, high‐visibility problems with exceptional teammates and grow your career as we build the future of global banking. If that sounds like you, let's build what's next. About the team 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. Our team is dedicated to developing a next‐generation billing platform designed to offer flexible pricing strategies and intuitive invoicing solutions. This platform aims to be a cornerstone for businesses, enabling them to bill and get paid effortlessly. By integrating cutting‐edge technology, we ensure that our solutions are easy to adopt and integrate, providing a robust billing experience for all users. The engineering team spans across Shanghai and Singapore, offering the chance to collaborate with cross‐functional teams around the world. Engage with various domains such as GTPN, PA, Scale, Issuing, and Spend to automate end‐to‐end pricing and billing processes. The work here is impactful, contributing to building a platform that empowers businesses globally, making a tangible difference in their operations. What you'll do 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. This role is based in Singapore/Shanghai, China. Responsibilities 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. Who you are We're looking for people who meet the minimum qualifications for this role. The preferred qualifications are great to have, but are not mandatory. Minimum qualifications More than 3 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