Backend Software Engineer Intern - C#, Cloud Security & AI (Undergraduate)

WEX Inc.; Austin (TX); Hybrid; USD 37,000 - 48,000; Full time

Benefits offered by this job

Health insurance

Dental and vision insurances

Retirement savings plan

Paid time off

Health savings account

Flexible spending accounts

Life insurance

Disability insurance

Tuition reimbursement

Job summary

WEX Inc. is a global commerce platform that helps businesses simplify operations and drive efficiency. This 13-week paid internship runs from late May to mid-August, offering mentorship, real projects, and pathways to return full-time roles.

Remote, hybrid, and onsite options are available. As a Software Engineer Intern, you will work with engineers and product managers to tackle distributed systems challenges, build backend components, and explore AI agents in the cloud.

Qualifications

• Pursuing a Bachelor's degree in CS/Software related field and have completed at least sophomore year.
• Strong proficiency in C#, .NET and OO design fundamentals.
• Foundational understanding of identity and security protocols (OAuth/OIDC/JWT/Passkeys).
• Hands-on exposure to AWS, Docker containerization, and GitHub CI/CD workflows.
• Experience or interest in building AI skill-based agents, with basic Python scripting is a plus.

Responsibilities

• Write backend components and scalable services using C#/.NET.
• Collaborate with engineers and product managers on distributed systems challenges.
• Implement cloud security and secure authentication/authorization in workflows.
• Containerize applications with Docker and manage CI/CD on AWS via GitHub.
• Experiment with AI agents and productivity scripting.

Skills

C#

.NET

OOP fundamentals

Python scripting

AI & ML awareness

Education

Bachelor's degree in Computer Science or related

Sophomore year completed

Tools

AWS

Docker

GitHub CI/CD

Job description

WEX is a global commerce platform that has been simplifying the way businesses operate for over 40 years. Our purpose is simple: to reduce administrative burdens, streamline payments, and manage mobility. With a team of over 7,200 professionals across 16 countries. Our specialties are employee benefits, business payments, and fleet/mobility solutions. We support more than 20 million SaaS accounts, 8 million Health Savings Accounts, and 19+ million vehicles worldwide. We're a growing company with a history of innovation and a focus on our customers, making this a great place to grow your career.

The WEX Summer Internship Program: Learn, Lead, and Make an Impact

Our 13-week paid internship program, running from late May to mid-August, is a chance for you to gain real-world experience and develop your skills. Recruiting begins in September and continues through November at our various locations across the U.S. You won't just be a bystander; you'll work on impactful projects and contribute to WEX’s mission. We provide mentorship, professional development, and weekly learning experiences to help you build confidence and leadership skills. High-performing interns may even get the chance to lead their own initiatives. We offer remote, hybrid, and onsite options for flexibility, and our goal is to bring top interns back full-time or offer them extended roles during the school year. Imagine starting your career with a company that’s building what’s next. Your future starts here.

About the Team/Role

As a Software Engineer Intern, you will work alongside engineers and Product Managers to tackle complex distributed systems challenges. In an evolving tech stack driven by AI-assisted and spec-driven development, you will focus on core software engineering principles, building backend components, and experimenting with AI agents in the cloud.

How you'll make an impact

• Engineered Backend Solutions: Write clean, scalable code using C# / .NET based on strong Object-Oriented Programming (OOP) principles.
• Implement Cloud Security: Integrate secure authentication and authorization protocols (OAuth, OIDC, JWT, Passkeys) into application workflows.
• Cloud & DevOps Workflows: Containerize applications using Docker and manage automated CI/CD pipelines on AWS using GitHub.
• Innovate with AI: Collaborate with senior engineers to explore, build, and integrate skill-based AI agents and productivity scripting.

Experience you'll bring

• Educational Foundation: 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.
• Strong proficiency in C#, .NET, and Object-Oriented design fundamentals.
• Foundational understanding of identity and security protocols (OAuth, OIDC, JWT, or Passkeys).
• Hands-on exposure to AWS, Docker containerization, and GitHub CI/CD workflows.
• Experience or interest in building AI skill-based agents, along with basic Python scripting skills, is a plus.

The base pay range represents the anticipated low and high end of the pay range for this position. Actual pay rates will vary and will be based on various factors, such as your qualifications, skills, competencies, and proficiency for the role. Base pay is one component of WEX's total compensation package. Most sales positions are eligible for commission under the terms of an applicable plan. Non-sales roles are typically eligible for a quarterly or annual bonus based on their role and applicable plan.

Benefits

• health
• dental and vision insurances
• retirement savings plan
• paid time off
• health savings account
• flexible spending accounts
• life insurance
• disability insurance
• tuition reimbursement
• and more

Pay Range

$27.00 - $35.00

WEX is a global commerce platform that helps businesses solve for operational complexities like employee benefits, managing and mobilizing fleets, and streamlining payments. With over 6,500 employees, we work with large and small companies in more than 200 countries and territories, and can tailor our services to meet the unique needs of their businesses. We hire people who share our passion for continuous innovation and client service that is unparalleled in the industry.

WEX is an equal opportunity employer committed to diversity and inclusion in the workplace. All qualified applicants will receive consideration for employment without regard to sex, race, color, age, national origin, religion, sexual orientation, gender identity, protected veteran status, disability or other protected status.

WEX promotes a drug‑free workplace.

Qualified individuals with a disability have the right to request a reasonable accommodation. If you require a reasonable accommodation at any point in the job application process, please submit your request through our Reasonable Accommodation Request Form. This form is for accommodation requests only and cannot be used to inquire about the status of applications.

To learn more about our employee benefits, please click here.

For more information, check out the "About Us" section.