Senior Full-Stack Engineer (Java / Spring Boot)

This is a remote position; however, the candidate must reside within 30 miles of one of the following locations: Boston, MA; San Francisco Bay Area, CA; Dallas, TX; Salt Lake City, UT; Seattle, WA; and Portland, ME About the Team/Role We are seeking a Full-stack Senior Software Engineer with deep expertise in backend development to contribute to the WEX Beyond Fuel and Expense Management initiative within WEX Mobility Engineering. This is a brand-new initiative, offering the opportunity to shape the architecture, establish engineering practices, and build the product from initial design through production launch. You will work across web & mobile applications, backend services, APIs, and partner integrations to deliver secure, reliable, and scalable payment and expense management experiences.

This is an individual contributor role focused on delivering core capabilities while collaborating with Product, Design, Security, and engineering teams across the United States and India. ​ How you’ll make an impact: Contribute to the technical architecture, design, and implementation of the Beyond Fuel and Expense Management platform. Build full-stack capabilities spanning user interfaces, backend services, data models, and external integrations.

Translate product requirements into technical designs, delivery milestones, and implementation plans. Design reusable business capabilities and APIs that support web, mobile, and partner experiences. Establish patterns for payment workflows, e