Backend Software Engineer Intern – AI Cloud APIs (C#/Java) – Remote/Hybrid

WEX, Inc.; United States; Hybrid; USD 37,000 - 48,000; Full time

Benefits offered by this job

Health, 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 seeking Software Engineer Interns for a 13-week paid internship across the U.S. from late May to mid-August.

You will work with engineers and Product Managers to build resilient backend systems, scalable APIs, and AI-integrated workflows. You’ll gain hands-on experience with cloud environments, modern AI toolchains, and mentorship to develop leadership skills. Remote, hybrid, and onsite options are available, with the goal of returning full-time or extended roles during the school

Qualifications

• 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.
• Knowledge of event streaming technologies (e.g., Kafka) or messaging architectures is a plus.

Responsibilities

• Develop Backend Services: Design and implement RESTful APIs, microservices, and backend processing pipelines using C# or Java.
• Database & Cloud Integration: Write efficient SQL queries for SQL Server and support deployments on Microsoft Azure.
• AI-Integrated SDLC: Leverage modern AI tools (Cursor, Copilot, MCPs, AI APIs) for spec-driven development, rapid prototyping, and automated task execution.
• Learn & Collaborate: Partner with senior engineers to apply best practices in microservices and message-driven architectures (e.g., Kafka).

Skills

C#

Java

APIs design

Backend architectures

Kafka

AI tools

Education

Bachelor's degree in Computer Science, Machine Learning, Software Engineering, or related field

Tools

SQL Server

Microsoft Azure

Cursor

Copilot

MCPs

Job description

WEX, Inc. is seeking Software Engineer Interns for a 13-week paid internship across the U.S. from late May to mid-August.

You will work with engineers and Product Managers to build resilient backend systems, scalable APIs, and AI-integrated workflows. You’ll gain hands-on experience with cloud environments, modern AI toolchains, and mentorship to develop leadership skills. Remote, hybrid, and onsite options are available, with the goal of returning full-time or extended roles during the school