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Airwallex Logo Airwallex · IT - Software Development

Staff Software Engineer, Backend - Scale

Singapore, Singapore 240000.00 - 300000.00 SGD / Year · 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.

Job Responsibility

  • Embedded Finance Platform: Build and maintain the multi-tenant infrastructure powering companies like Brex, Rippling, Navan, Qantas, and SHEIN. You'll architect systems that aggregate requests from all platform customers, meeting enterprise-grade SLAs for availability, latency, and throughput while handling cross-data-center scenarios
  • Cross-Domain Product Features: Own features that require synthesizing knowledge across business, regulatory, and technical domains—areas where no single existing team has full coverage, like tax systems, compliance-driven flows, or monetization tools
  • Solutions Architecture: Design integrations for enterprise prospects by translating their business requirements into technical solutions. Your architectural decisions directly influence deal outcomes—from enabling multi-million dollar contracts to differentiating in competitive sales
  • Develop and Innovate: Your work will directly impact the growth and success of businesses worldwide
  • Collaborate and Create: Work alongside a team of talented engineers, product managers, and designers to bring our Embedded Finance products from concept to launch. Your input will be crucial in shaping the future of finance
  • Understand and Empathize: Dive deep into the needs and challenges of our customers. Your good product sense will enable you to design and implement solutions that truly resonate with our users
  • Measure and Optimize: Leverage data to drive decisions. Your keen data sense will help you measure the success of our products and identify opportunities for optimization and growth

Requirements

  • Have 5+ years of software engineering experience (8+ for Staff) in Java/Spring Boot
  • Excel at making the right level of abstraction—balancing flexibility and simplicity in system/component design
  • Demonstrate clean communication across technical and non-technical stakeholders
  • Make pragmatic decisions on when to optimize for performance vs. velocity based on business impact
  • Thrive in cross-functional environments spanning Product, Design, Compliance, and Sales
  • Design for scale, maintainability, and production excellence
  • (Staff) Have led multi-team initiatives with measurable technical or business impact

Nice to have

  • Fintech, payments, or regulated industry experience
  • High-scale performance tuning (100k+ QPS, large user bases, strict latency SLAs)
  • Multi-tenant SaaS or platform architecture background
  • Proficiency with PostgreSQL, Redis, Kafka, or cloud platforms (AWS/GCP/Azure)
  • Experience with OAuth2.0, API design, or developer documentation
  • Cross-region deployment or data residency compliance experience
  • Solutions engineering or customer-facing technical experience

What we offer

  • Offers Equity
  • US-based employees are eligible to participate in medical, dental, and vision insurance, a 401(k) plan, short-term and long-term disability, basic life insurance, and well-being benefits
  • US-based employees also receive 20 paid days of vacation and 12 paid days of company holidays in a calendar year
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