WEX is a global leader in financial technology solutions, simplifying complex payment ecosystems across Fleet, Corporate Payments, and Health & Benefits. For further details, please visit www.wexinc.com.

We are driving a major technology transformation to modernize our platforms, accelerate innovation, and deliver exceptional customer experiences.

About The Role

We are seeking a Senior Software Engineer who can design and deliver scalable, secure, and modular systems that align with our technology transformation strategies. As part of this team you will have the opportunity to build scalable high impacting services and also modernize our legacy services by building modular, scalable microservices using modern technologies across the entire architecture. These systems are designed to be highly available, resilient, easy to maintain, developer-friendly, and optimized for performance without dependency on legacy components.

How You’ll Make An Impact

Lead the design and development of full-stack solutions, with emphasis on event-driven microservices, APIs, and data platforms
Drive iterative modernization by decomposing monoliths into shared, modular services
Build reusable capabilities aligned with product-centric domain models
Contribute to agentic architectures and intelligent automation that power seamless user experiences
Collaborate with cross-functional teams to deliver measurable business outcomes, not just features
Mentor junior developers and promote best engineering practices
Design, develop, test, and maintain cloud-ready microservices and APIs
Work with streaming data pipelines (Kafka) to enable real-time insights
Apply platform-thinking approaches by building reusable and discoverable capabilities
Ensure quality from the start through automated validation and CI/CD pipelines
Deliver value iteratively, focusing on finishing and deploying features
Partner with product and architecture teams to ensure systems are decoupled, scalable, and SaaS-mature
Use monitoring and feedback loops to drive data-informed improvements
Proactively tackle technical debt while balancing modernization and customer value delivery

Experience you'll bring

Bachelor’s or Master’s degree in Computer Science or Engineering
Experience in backend or microservices development (Java, .NET, Python, Go, etc.)
Hands-on experience with Java and Java-based frameworks
Expertise in object-oriented design and programming
Strong problem-solving skills in the software engineering domain
Experience working with modern backend microservices architectures
Experience building and consuming RESTful APIs
Experience with message brokers and event-streaming platforms (Kafka)
Strong knowledge of SQL, relational, and non-relational databases
Comfort working with JSON, XML, YAML, and other interface file formats
Experience with Unix/Linux environments, scripting, and CI/CD pipelines
Demonstrated ability to decompose systems into modular, reusable services
Excellent communication and collaboration skills across distributed teams

Preferred Qualifications

Experience with FinTech solutions or payments ecosystems
Cloud experience (AWS preferred) and containerization (Docker, Kubernetes)
Familiarity with modern UI frameworks (React, Angular, Vue.js)
Experience with Change Data Capture (CDC) tools
Understanding of AI/ML integration in platforms and workflows
Experience with large-scale transactions and highly available systems

What Makes You a Great Fit

You embody our engineering principles: API-first, modular, iterative, and data-driven
You thrive in modernization work, making legacy systems more agile
You value finishing and delivering over just starting
You see engineering as a way to unlock business outcomes, not just write code
You champion quality, automation, and reusability in everything you build