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Airwallex Logo Airwallex · IT - Software Development

Software Engineer II, Backend, Tech Platform

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

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 2,000 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.

Job Responsibility

  • Build Impactful Infrastructure – Develop and refine a cutting-edge application infrastructure that eliminates common technical bottlenecks, reduces maintenance overhead for developers, and accelerates business innovation
  • Solve Complex, High - Scale Challenges – Tackle intricate, organization-wide problems by leveraging the latest technologies, including reactive programming, Temporal, vector databases, distributed systems, and advanced gateway solutions
  • Drive Strategic Technological Excellence – Conduct comprehensive evaluations of emerging solutions and guide the company’s long-term architectural decisions to ensure scalability, efficiency, and global resilience

Requirements

  • Strong proficiency in backend programming languages such as Java, Go, Rust, Lua, or Python and their corresponding frameworks
  • Infrastructure & Cloud Expertise: Familiarity with cloud services (AWS, GCP, Aliyun) and infrastructure management tools (Kubernetes, Docker, Istio)
  • Database & Storage Systems Expertise: Proven hands-on experience with PostgreSQL, Redis, Elasticsearch, and logical replication, with a deep understanding of performance optimization, scalability, and data consistency in distributed systems
  • Traffic Management Expertise: Strong familiarity with NGINX, OpenResty, Envoy, APISIX, Kong, and Istio, with a solid understanding of traffic routing, load balancing, and API gateway management in high-scale distributed systems
  • API Lifecycle & Security Expertise: Strong experience and deep understanding of API lifecycle management, from design to deprecation, along with expertise in API security best practices, including authentication, authorization, and threat mitigation

Nice to have

  • Performance Tuning Expertise: Hands-on experience optimizing API Gateway performance, including advanced profiling techniques such as CPU flame graphs to diagnose and enhance system efficiency
  • Service Mesh Expertise: Hands-on experience managing traffic between Kubernetes pods using Istio, including traffic routing, load balancing, and resilience strategies within a service mesh architecture
  • API Security Expertise: Hands-on experience in securing APIs, including mitigating threats such as DDoS attacks, SQL injection, and implementing mTLS (mutual TLS) and Data Loss Prevention (DLP) to ensure robust protection and compliance
  • Open Source & Innovation Expertise: Stay up to date with the latest advancements in the open-source community, with the ability to evaluate, adopt, and introduce cutting-edge technologies to enhance Airwallex’s technology stack
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