Software Development Engineer 3

**About the team / Role** WEX is a global leader in financial technology solutions, simplifying complex payment ecosystems across Fleet, Corporate Payments, and Health & Benefits. For further details, do visit [](http://www.wexinc.com/)[www.wexinc.com](http://www.wexinc.com). We are driving a major technology transformation to modernize our platforms, accelerate innovation, and deliver exceptional customer experiences. We are seeking a Senior Software Engineer (SDE-3) to contribute to this transformation by designing and building reliable, scalable, and modern services. You’ll help evolve our legacy systems into API-first, modular, and event-driven architectures that enable faster delivery, smarter workflows, and the foundation for agentic, intelligent systems.   **How you'll make an impact** ----------------------------- As a Level 3 Engineer, you will: * Lead design and development of full-stack solutions, with emphasis on event-driven micro-services, APIs, and data platforms. * Drive iterative modernization, helping decompose 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. **Experience you will bring** ----------------------------- * Design, develop, test, and maintain cloud-ready micro-services and APIs. * Work with streaming data pipelines (Kafka, CDC) to enable real-time insights. * Implement platform-thinking approaches—build reusable, discoverable capabilities. * Ensure quality from the start through automated validation and CI/CD pipelines. * Deliver value iteratively, focusing on finishing and deploying features, not just starting them. * 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. * Tackle technical debt proactively, balancing modernization with customer value delivery. Required Qualifications ----------------------- * Bachelor’s/Master’s degree in Computer Science and Engineering. * 5+ years in backend/micro-services development leveraging Java tech stack. * Hands-on experience with Java and Java related frameworks. * Expertise in object oriented design and programming. * Strong problem solving skills in the software engineering domain. * Experience in working on modern backend micro-services architecture. * 5+ years in building Restful APIs, exposing and consuming; experience with message broker and event streaming (Kafka). * Strong knowledge of SQL, relational and non relational databases. * Comfortable working with JSON, XML, YML and other interfacing file types. * Experience in 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. Nice to Have ------------ * Experience with FinTech solutions or payments ecosystems. * Cloud experience (AWS preferred), containerization (Docker, Kubernetes). * Experience with large-scale transactions and highly available systems. * Familiarity with modern UI frameworks (React, Angular, Vue.js). * Familiarity with Change Data Capture (CDC) tools. * Interest in AI and automation — especially in how intelligent agents can optimize workflows.   What Makes You a Great Fit -------------------------- * You’re eager to learn from staff engineers and contribute to building the future architecture. * You think about reusability, data flow, and automation when building solutions. * You’re curious about agentic systems and how technology can enable intelligent automation. * You take pride in writing quality code that moves systems closer to cloud-ready, modular design. * You thrive in a collaborative, fast-paced environment where modernization is a shared mission.