Senior Backend Engineer (Fintech)

Location: Singapore

Company

Airwallex builds a unified payments and financial platform for global businesses, including business accounts, payments, spend management, treasury, and embedded finance.

What you will do

• Design and implement scalable, secure backend services for card issuance and expense management.
• Contribute to the architecture and long-term technical direction of backend systems.
• Own feature delivery from design through production.
• Write high-quality, testable code focused on reliability and maintainability.
• Promote engineering practices including observability and API design.
• Collaborate with product, infrastructure, and design teams while mentoring engineers.

Requirements

• Bachelor’s degree in Computer Science, Software Engineering, or a related field.
• 5+ years of professional software engineering experience.
• Production experience designing and building backend systems and APIs.
• Strong fundamentals in algorithms, data structures, and distributed systems.
• Proficiency in at least one backend language: Java, Kotlin, Go, or Python.
• Experience with REST API design, backend frameworks such as Spring Boot, cloud infrastructure such as AWS or GCP, and Kubernetes.

Nice to have

• Familiarity with observability and monitoring tools such as Grafana, Prometheus, or Splunk.

Culture & Benefits

• Collaborative, fast-paced engineering environment.
• Focus on technical craftsmanship, continuous learning, and ownership.
• Opportunity to work on secure, reliable financial products supporting global businesses.