Staff Software Engineer, Payments (Fintech)

Location: Amsterdam, Netherlands

Company

Airwallex provides a unified payments and financial platform for global businesses, combining proprietary infrastructure and software for accounts, payments, spend management, treasury, and embedded finance.

What you will do

• Lead the architecture and evolution of payment acceptance infrastructure.
• Design and build scalable backend services, REST APIs, event-driven systems, and integration components in a microservices architecture.
• Drive initiatives across payment gateways, acquiring, issuing, card networks, and local payment methods.
• Partner with product, business, infrastructure, and external engineering teams to translate merchant needs into technical solutions.
• Conduct architectural reviews, address technical debt, and improve reliability, scalability, observability, and operational effectiveness.
• Raise engineering standards through design practices, code quality, testing, and mentorship.

Requirements

• 10+ years of software engineering experience, including Staff-level technical leadership or equivalent ownership of complex backend systems.
• Experience designing and operating high-volume distributed systems, preferably in payments, fintech, commerce, or financial infrastructure.
• Recent hands-on experience with Java or Kotlin and Spring or Spring Boot.
• Expertise with REST APIs, backend microservices, Kafka-based event streams, and distributed data stores such as Cassandra, Hazelcast, or Oracle Coherence.
• Experience with GCP or AWS, Docker, Kubernetes, and observability tools such as New Relic, StatsD, ELK, Datadog, or Prometheus.
• Ability to lead projects from concept to production and communicate effectively with engineering, product, and business stakeholders.

Nice to have

• Experience building payment gateways, acquiring or issuing platforms, or payment acceptance infrastructure.
• Experience integrating Visa, Mastercard, iDEAL, Klarna, Trustly, or similar payment networks and methods.
• Familiarity with authorization, capture, refunds, chargebacks, settlement, reconciliation, fraud, risk, or PCI/compliance workflows.
• Experience mentoring senior engineers and leading cross-team technical initiatives.

Culture & Benefits

• Work on complex, high-visibility problems in global payments and financial infrastructure.
• Collaborate with teams across a global organization of more than 2,300 employees and 27 offices.
• Emphasis on ownership, speed with good judgment, curiosity, rigorous decision-making, and end-to-end execution.
• Equal-opportunity workplace with accommodation support for applicants with disabilities or special needs.