Backend Software Engineer Intern - C#/Java & AI Workflows (Undergraduate)
About The Position
The WEX Summer Internship Program is a 13-week paid program, running from late May to mid-August, designed to provide interns with real-world experience and skill development. Interns will work on impactful projects contributing to WEX’s mission, with opportunities for mentorship, professional development, and weekly learning experiences. High-performing interns may lead their own initiatives. The program offers remote, hybrid, and onsite options, with the goal of bringing top interns back full-time or offering extended roles. As a Software Engineer Intern, you will work alongside engineers and Product Managers to build resilient backend systems and AI-integrated workflows. You will gain hands-on experience designing scalable APIs, working in cloud environments, and leveraging modern AI toolchains.
Requirements
- Currently pursuing a Bachelor's degree in Computer Science, Machine Learning, Software Engineering, or related field and will have completed at least your Sophomore year of school at the start of the internship.
- Proficiency in C# (preferred) or Java, along with strong standard database skills (SQL / SQL Server).
- Solid understanding of API design principles, backend processing architectures, and Microsoft Azure.
- Practical experience using AI coding assistants or APIs (e.g., Cursor, Copilot, MCPs) to accelerate development.
Nice To Haves
- Knowledge of event streaming technologies (e.g., Kafka) or messaging architectures is a plus.
Responsibilities
- Design and implement RESTful APIs, microservices, and backend processing pipelines using C# or Java.
- Write efficient SQL queries for SQL Server and support deployments on Microsoft Azure.
- Leverage modern AI tools (Cursor, Copilot, MCPs, AI APIs) for spec-driven development, rapid prototyping, and automated task execution.
- Partner with senior engineers to apply best practices in microservices and message-driven architectures (e.g., Kafka).
Benefits
- health, dental and vision insurances
- retirement savings plan
- paid time off
- health savings account
- flexible spending accounts
- life insurance
- disability insurance
- tuition reimbursement
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What This Job Offers
Job Type
Full-time
Career Level
Intern
