Senior Software Engineer, Growth

About Airwallex Airwallex is the AI-native financial operating system for a real-time, intelligent economy. More than 676,000 businesses, including McLaren Racing, Qantas, SHEIN, and TikTok, use us, directly or through our platform partners, to run their financial operations or build and monetize financial products of their own. We started in Melbourne in 2015 to build the infrastructure global commerce runs on. We're the regulated backbone behind global payments: not by accident, but by design. A decade plus, 85+ licenses, and a financial infrastructure spanning North America, Europe, the Middle East, and Asia-Pacific. We're co-headquartered in San Francisco and Singapore, with more than 2,300 people across 27 offices. We hire builders with founder-level energy, people who move fast with good judgment, dig in with real curiosity, and make calls from first principles rather than waiting to be told what to do. Read our operating principles to see it in full. About the Team Our Growth Team sits at the heart of Airwallex’s mission, focusing on user acquisition and strategic market expansion. We leverage data and cutting-edge technologies to craft seamless, intuitive experiences that help millions of users discover, engage with, and benefit from our products. From new-user funnels to onboarding optimizations, our Growth team is all about experimentation, rapid iteration, and driving sustainable business impact. Whether it’s designing scalable architectures for high-traffic pages, building robust A/B testing frameworks, or integrating global marketing platforms, the Growth team’s contributions directly shape how we attract and retain customers worldwide. Joining the Growth team means you’ll have a front-row seat to the most crucial stage of our product lifecycle and play a pivotal role in fueling the next wave of our global expansion. About the Role Design and Build Scalable Systems Architect, develop, and maintain microservices in Java/Kotlin (or similar languages), ensuring our high-traffic, high-availability systems meet global user demands. Implement best practices for service-to-service communication, orchestration, and fault tolerance. Enable Data-Driven Decisions Collaborate with data scientists and product managers to design data pipelines, analytics platforms, and event-driven architectures. Ensure the data powering our Growth initiatives is accurate, reliable, and easily accessible. Collaborate and Innovate Work closely with cross-functional teams—Frontend, Product, Design, and Marketing—to translate business requirements into scalable backend solutions. Participate in architectural reviews, code reviews, and strategy sessions to continually elevate the quality and performance of our backend services. Experiment and Iterate Develop services that support rapid A/B testing, feature toggles, and real-time performance monitoring. Continuously improve backend functionalities to reduce friction, increase user engagement, and drive conversions. Promote Security & Compliance Integrate secure coding practices and frameworks to protect user data and maintain global regulatory compliance. Identify potential vulnerabilities, ensure robust authentication and authorization mechanisms, and proactively address security risks. Who you are Experienced and Technically Proficient: You possess a wealth of experience in software development, underpinned by a robust expertise in Java/Kotlin. Your approach goes beyond mere coding; you are a craftsman of comprehensive solutions. As a technical bar raiser, you set high standards and lead by example, elevating the capabilities of those around you. Empathetic and Insightful: Your deep empathy for customer needs drives your development process, allowing you to create intuitive and impactful products. This understanding is not just about meeting requirements, but about enriching user experiences. Data-Driven and Analytical: You view data as a narrative element of development, a critical tool that info