Senior Software Engineer (C#/.NET & AI)

About this role

*Please note: This role is open only to candidates located in Chicago, IL; Dallas, TX; New York City, NY; Boston, MA; or Portland, ME.*

We are currently unable to provide immigration sponsorship or support, either now or in the future.

At WEX, we simplify the business of running a business. Our WEX Benefits solutions reduce complexity and help employers manage the cost and administration of employee benefits.

We are looking for passionate technologists, collaborators, and problem solvers to join our Benefits Technology team as we build the next generation of employer benefits platforms and services.

As a Senior Software Engineer, you will work closely with Product Managers, customers, and engineering peers to understand the challenges employers face in the evolving benefits landscape. You will design and deliver scalable, high-quality solutions using modern engineering practices, including test-driven development and cloud-native architectures.

You will have the opportunity to contribute to mission-critical systems, influence technical direction, and help shape engineering standards across the team.

How You’ll Make an Impact

• Partner with Product and stakeholders to understand customer challenges and translate them into technical solutions
• Design, build, test, and deploy scalable, secure, and high-quality software solutions
• Use data to measure outcomes, validate assumptions, and drive engineering decisions
• Develop and maintain microservices and event-driven architectures
• Strengthen engineering practices including TDD, BDD, and CI/CD automation
• Support production systems through monitoring, incident response, and continuous improvement
• Identify performance bottlenecks and optimize systems for scalability and reliability
• Mentor peers and contribute to a culture of technical excellence and continuous learning
• Take ownership of work, operate independently, and deliver high-quality outcomes with minimal supervision

**Experience Yo...