Senior Software Engineer, Payments Platform

Academic Key; Amsterdam; Hybrid; EUR 150,000 - 200,000; Full time

Benefits offered by this job

Hybrid work mode

Job summary

Airwallex in Amsterdam, NL, is seeking a Senior Software Engineer for the Payments Platform to build scalable, reliable payment infrastructure across markets. You will design and implement new capabilities, develop REST services in a microservices setup, and connect with a React frontend.

The role is hybrid, with three days in the office in Amsterdam. You should have 4+ years in engineering, strong Java/Kotlin, Spring, Kafka, and cloud experience (GCP/AWS), plus Docker/Kubernetes and modern

Qualifications

• 4+ years in modern engineering with CI and quality emphasis.
• Proven from inception to delivery of thoroughly tested solutions.
• Strong CS fundamentals; Java or Kotlin with Spring/Spring Boot.
• REST API design for high-volume distributed systems.
• Kafka plus distributed data stores like Cassandra/Hazelcast/Coherence.
• Cloud experience (GCP or AWS) with EC2/RDS/ELB/CloudFront.
• Docker and Kubernetes expertise.
• Monitoring with New Relic/Datadog/Prometheus.

Responsibilities

• Build scalable payments infrastructure for international use.
• Design and implement capabilities across the payments platform.
• Develop REST services in a backend microservices architecture.
• Collaborate with Payments Product and partner teams.
• Conduct architectural reviews and reduce technical debt.
• Improve operational effectiveness of current solutions.

Skills

Java

Kotlin

Spring

Spring Boot

REST APIs

Distributed systems

Kafka

Cassandra

Hazelcast

Oracle Coherence

GCP

AWS

Docker

Kubernetes

New Relic

Datadog

Prometheus

Tools

Git

CI/CD

Kafka tooling

Monitoring tools

Job description

Senior Software Engineer, Payments Platform

Airwallex · NL - Amsterdam

Abroad NL - Amsterdam Full Time

About Airwallex Airwallex is the AI-native financial operating system for a real-time, intelligent economy. More than 675,000 businesses, including McLaren Racing, Qantas, SHEIN, and TikTok, use us, directly or through our platform partners, to run their financial operations or build and monetize financial products of their own. We started in Melbourne in 2015 to build the infrastructure global commerce runs on. We're the regulated backbone behind global payments: not by accident, but by design. A decade plus, 85+ licenses, and a financial infrastructure spanning North America, Europe, the Middle East, and Asia-Pacific. We're co-headquartered in San Francisco and Singapore, with more than 2,700 people across 27 offices. We hire builders with founder-level energy, people who move fast with good judgment, dig in with real curiosity, and make calls from first principles rather than waiting to be told what to do. Read our operating principles to see it in full.

Hiring Location: Amsterdam, Netherlands (Hybrid Mode) Total Compensation: 150,000 to 200,000 EUR

Senior Software Engineer, Payments Platform

How you'll make impact You'll help build the infrastructure that makes international payments reliable, scalable, and easier for businesses to accept across markets. Design and implement new capabilities across Airwallex's international payments platform, helping businesses accept and process payments reliably across markets. Build REST services and integration components within a backend microservices architecture, connecting with our React frontend. Shape the next generation of Payment Acceptance infrastructure, keeping merchant needs and business outcomes at the centre of your decisions. Conduct architectural reviews, address technical debt, and improve the operational effectiveness of current and upcoming solutions. Partner with the Payments Product team and, where needed, engineering teams at external partners. You'll work in a hybrid setup, spending three days in the office.

What we're looking for Essentials

• Over four years of experience using contemporary engineering methodologies, with an emphasis on continuous integration and quality engineering.
• Experience taking concepts from inception through implementation, with a focus on delivering thoroughly tested, high-quality solutions.
• Strong computer science fundamentals and recent hands-on experience with Java or Kotlin and Spring or Spring Boot.
• Experience designing and building REST APIs and working with high-volume distributed systems.
• Experience with Kafka event streams and distributed data storage systems such as Cassandra, Hazelcast, Oracle Coherence, or similar technologies.
• Experience with cloud platforms such as GCP or AWS, including services such as EC2, RDS, ELB, or CloudFront.
• Experience with containerisation technologies such as Docker and Kubernetes.
• Familiarity with operational tooling such as New Relic, StatsD, ELK, Datadog, or Prometheus.

Preferred

• Extensive experience developing payment gateways, acquiring platforms, issuing platforms, or equivalent payment systems.
• Experience integrating local payment methods such as iDEAL, Klarna, or Trustly.
• Experience working with major card schemes such as Visa or Mastercard.

You’ll thrive here if You've worked in a high-growth or scaling environment and know what it takes to build systems that need to grow with the business. You own the outcome and you don't wait for permission to fix what's broken. You're comfortable with ambiguity. Give you a problem, not a prescription, and you'll run with it. You say what you mean. You're direct, but you lead with respect. You value in-person collaboration and are happy being in the office three days a week.

Learn more about your team Payments Platform at Airwallex builds the infrastructure that turns global payment complexity into reliable, scalable payment experiences, helping businesses accept and process money across markets with less friction. The challenge is balancing performance, reliability, local complexity, and commercial outcomes in the same system, where small improvements can materially affect conversion and failures are immediately visible. You'll do well here if you're thoughtful, pragmatic, and motivated by making complex problems feel simple to customers. If you want to build the platform that makes payments work seamlessly for businesses around the world, this is the team at the center of that mission.