About the Team/Role
This role is critical in building the technology that powers mobility payment systems used by fleets across Europe and Asia Pacific. As a Software Development Engineer 3 (SDE3), you will play a key role in developing scalable services, improving architectural maturity, and mentoring junior team members. You will lead the delivery of impactful features and help define system behaviors that serve global customers in EU and APAC.
How you’ll make an impact
• Design and implement scalable backend systems and APIs.
• Lead design discussions and own features end-to-end.
• Identify and address tech debt, bottlenecks, and reliability concerns.
• Write high-quality, testable code and support DevOps automation.
• Drive observability, performance, and service reliability improvements.
• Mentor and support the development of junior and mid-level engineers.
• Participate in cross-team technical planning and retrospectives.
Experience you’ll bring
• 5–8 years of professional backend engineering experience.
• Expertise in Java, Spring Boot, REST APIs, and relational databases.
• Experience with AWS, Docker/Kubernetes, and CI/CD workflows.
• Exposure to distributed systems and event-driven architecture (Kafka preferred).
• Strong debugging, troubleshooting, and performance optimization skills.
• Excellent collaboration and communication skills.
• Experience mentoring or leading peers in technical areas.
Tech Stack
Java • Spring Boot • REST APIs • Kafka • PostgreSQL • Docker • Kubernetes • AWS • gRPC • CI/CD • Git • Prometheus • Grafana
Top Skills
What We Do
We simplify complex payment systems for fleets, corporate payments, and healthcare—unlocking insights, opportunities, and efficiencies to give you greater control of your business.
Powered by the belief that complex payment systems can be made simple, WEX (NYSE: WEX) is a leading financial technology service provider across a wide spectrum of sectors, including fleet, travel and healthcare. WEX operates in more than 10 countries and in more than 20 currencies through approximately 4,900 associates around the world. WEX fleet cards offer approximately 14 million vehicles exceptional payment security and control; our travel and corporate solutions business processes over $35 billion of purchase volume annually; and the WEX Health financial technology platform helps 343,000 employers and more than 28 million consumers better manage healthcare expenses.
