Staff Backend Engineer (Fintech)

TL;DR

Staff Backend Engineer (Fintech): Designing and evolving high-scale core systems for card issuing, transaction processing, and settlement with an accent on reliability and scalability. Focus on building distributed event-driven architectures and leading technical direction for mission-critical payment platforms.

Location: Based in Singapore

Company

Airwallex is a unified payments and financial platform for global businesses, providing integrated solutions for business accounts, payments, and embedded finance.

What you will do

• Design, build, and operate highly reliable, scalable systems that power real-time card transactions.
• Lead the architecture of distributed, event-driven systems focusing on correctness, performance, and resiliency.
• Take end-to-end ownership of complex problem spaces from system design through production rollout.
• Set a high bar for code quality, testing, observability, and operational readiness.
• Influence technical direction across multiple teams through design reviews, RFCs, and mentorship.
• Contribute to the evolution of core infrastructure to improve developer productivity and system reliability.

Requirements

• 8+ years of professional software engineering experience with impact as a senior or staff IC.
• Strong proficiency in backend languages such as Java, Kotlin, Go, or Python.
• Deep experience designing and delivering large-scale distributed systems in production.
• Hands-on experience with event-driven architectures and streaming platforms like Kafka.
• Proven experience operating RESTful APIs at scale and using domain-driven design.
• Cloud experience with GCP (preferred) or AWS, including Docker and Kubernetes.

Nice to have

• Experience in fintech, payments, or other regulated financial domains.
• Deep expertise with JVM-based ecosystems, specifically Java or Kotlin with Spring Boot.

Culture & Benefits

• Environment for builders with founder-like energy, focusing on real impact and true ownership.
• Opportunity to tackle complex, high-visibility problems alongside exceptional teammates.
• Encouragement to use AI to work smarter and solve problems faster.
• Culture of humility, collaboration, and turning zero-to-one ideas into real products.
• Equal opportunity employer valuing diversity and merit-based hiring.