Senior / Software Engineer, Global Payments

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 200,000 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 2,200 of the brightest and most innovative people in tech across 26 offices around the globe. Valued at US$8 billion and backed by world-leading investors including T. Rowe Price, Visa, Mastercard, Robinhood Ventures, Sequoia, Salesforce Ventures, DST Global, and Lone Pine Capital, 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 https://www.airwallex.com/us/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 As a global engineering powerhouse, our team spans China, the Netherlands, and Singapore, embracing a rich tapestry of cultures and perspectives. Guided by our True North Vision, we're passionately striving to become the preferred payment partner for businesses seeking to boost revenue and streamline expenses. Our mission is to simplify the complexities of payments for businesses by designing solutions that seamlessly integrate into their workflows, enhancing efficiency and driving customer conversion rates. Within our diverse and dynamic team, you'll find yourself at the intersection of innovation and practicality, where every contribution is essential in making payment processes effortless. WHAT YOU'LL DO Join our dynamic team as an engineer and play a pivotal role in revolutionizing the security landscape of online transactions! You will spearhead the integration of 3D Secure (3DS), a cutting-edge standard developed by Visa and MasterCard, into our core card authentication processes. Dive deep into diverse real-time transaction scenarios, and help us deliver unparalleled security assurance for our users. Be at the forefront of innovation, where your expertise will enhance the online shopping experience and safeguard the future of digital payments. This role is based in Singapore. RESPONSIBILITIES: - Build our own 3DS infrastructure service, which will significantly enhance a business's payment processing capabilities, strengthen security measures, and boost customer trust. - Collaborate with various systems and teams to establish a robust foundation for our global payment infrastructure. - Engage with engineering teams across Airwallex's global offices, fostering effective communication. - Regularly collaborate with users and financial partners to ensure seamless integration. - Design, develop, and maintain APIs, services, and systems to uphold a reliable payment processing flow. - Troubleshoot production issues across different levels of the stack. - Take ownership of and optimize critical components within Airwallex's online payment processing flow. WHO YOU ARE We're looking for people who meet the minimum qualifications for this role. The preferred qualifications are great to have, but a