Senior Software Engineer, Payments Platform

About Airwallex Airwallex is the AI-native financial operating system for a real-time, intelligent economy. More than 675,000 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 2,700 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. Hiring Location: Amsterdam, Netherlands (Hybrid Mode) Total Compensation: 150,000 to 200,000 EUR Senior Software Engineer, Payments Platform How you'll make impact You'll help build the infrastructure that makes international payments reliable, scalable, and easier for businesses to accept across markets. Design and implement new capabilities across Airwallex's international payments platform, helping businesses accept and process payments reliably across markets. Build REST services and integration components within a backend microservices architecture, connecting with our React frontend. Shape the next generation of Payment Acceptance infrastructure, keeping merchant needs and business outcomes at the centre of your decisions. Conduct architectural reviews, address technical debt, and improve the operational effectiveness of current and upcoming solutions. Partner with the Payments Product team and, where needed, engineering teams at external partners. You'll work in a hybrid setup, spending three days in the office. What we're looking for Essentials Over four years of experience using contemporary engineering methodologies, with an emphasis on continuous integration and quality engineering. Experience taking concepts from inception through implementation, with a focus on delivering thoroughly tested, high-quality solutions. Strong computer science fundamentals and recent hands-on experience with Java or Kotlin and Spring or Spring Boot. Experience designing and building REST APIs and working with high-volume distributed systems. Experience with Kafka event streams and distributed data storage systems such as Cassandra, Hazelcast, Oracle Coherence, or similar technologies. Experience with cloud platforms such as GCP or AWS, including services such as EC2, RDS, ELB, or CloudFront. Experience with containerisation technologies such as Docker and Kubernetes. Familiarity with operational tooling such as New Relic, StatsD, ELK, Datadog, or Prometheus. Preferred Extensive experience developing payment gateways, acquiring platforms, issuing platforms, or equivalent payment systems. Experience integrating local payment methods such as iDEAL, Klarna, or Trustly. Experience working with major card schemes such as Visa or Mastercard. You'll thrive here if You've worked in a high-growth or scaling environment and know what it takes to build systems that need to grow with the business. You own the outcome and you don't wait for permission to fix what's broken. You're comfortable with ambiguity. Give you a problem, not a prescription, and you'll run with it. You say what you mean. You're direct, but you lead with respect. You value in-person collaboration and are happy being in the office three days a week. Learn more about your team Payments Platform at Airwallex builds the infrastructure that turns global payment complexity into reliable, scalable payment experiences, helping businesses accept and process money across markets with less friction. The challenge is balancing performance, reliability, local complexity, and commercial outcomes in the same system, where small improvements can materially affect conversion and failures are immediately visible. You'll do well here if you're thoughtful, pragmatic, and motivated by making complex problems feel simple to customers. If you want to build the platform that makes payments work seamlessly for businesses around the world, this is the team at the center of that mission. Applicant Safety Policy: Fraud and Third-Party Recruiters To protect you from recruitment scams, please be aware that Airwallex will not ask for bank details, sensitive ID numbers (i.e. passport), or any form of payment during the application or interview process. All official communication will come from an @ airwallex.com email address. Please apply only through careers.airwallex.com or our official LinkedIn page. Airwallex does not accept unsolicited resumes from search firms/recruiters. Airwallex will not pay any fees to search firms/recruiters if a candidate is submitted by a search firm/recruiter unless an agreement has been entered into with respect to specific open position(s). Search firms/recruiters submitting resumes to Airwallex on an unsolicited basis shall be deemed to accept this condition, regardless of any other provision to the contrary. Equal opportunity Airwallex is proud to be an equal opportunity employer. We value diversity and anyone seeking employment at Airwallex is considered based on merit, qualifications, competence and talent. We don’t regard color, religion, race, national origin, sexual orientation, ancestry, citizenship, sex, marital or family status, disability, gender, or any other legally protected status when making our hiring decisions. If you have a disability or special need that requires accommodation, please let us know.