Airwallex

Senior Fullstack Engineer, Scale

UK - London. Posted 10 days ago

The role

You will own frontend work for the Scale team, designing and implementing user-facing experiences. You will partner with backend engineers, Product, and Design to turn requirements into reliable solutions.

What you will do

  • Build and maintain frontend experiences across the stack
  • Deliver reliable, maintainable solutions for multi-tenant platforms, enterprise integrations, and cross-domain product features
  • Partner with backend engineers, Product, Design, and other stakeholders
  • Make pragmatic decisions in ambiguous situations
  • Design for scale, maintainability, and production excellence

Required qualifications

  • Strong experience building frontend applications with ReactJS
  • Experience with modern JavaScript or TypeScript
  • Experience working across the full stack, with the ability to own frontend work end to end
  • A track record of working independently and delivering high-quality software with minimal oversight
  • The ability to make pragmatic technical decisions in ambiguous situations
  • Clear 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

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

About the company

Airwallex is an AI-native financial operating system used by businesses to run financial operations or build financial products. It provides financial infrastructure spanning North America, Europe, the Middle East, and Asia-Pacific.