Backend Engineer Intern (C#/Java) - Remote/Hybrid

WEX Inc.; California (MO); Hybrid; USD 37,000 - 48,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Vision insurance

Retirement plan

Paid time off

Health Savings Account (HSA)

Flexible Spending Accounts

Life insurance

Disability insurance

Tuition reimbursement

Job summary

WEX Inc. seeks a Software Engineer Intern to build resilient backend systems and AI-enabled workflows. You will work with engineers and product managers to design scalable APIs, develop microservices, and deploy in cloud environments using modern AI tooling.

You’ll gain real-world experience in API design, backend processing, and data integrations with SQL Server and Microsoft Azure, while learning through mentorship and hands-on projects across multiple locations.

Qualifications

• Pursuing a Bachelor’s degree in Computer Science or related field, with at least sophomore standing at internship start.
• Proficiency in C# (preferred) or Java and strong SQL/SQL Server skills.
• Familiarity with API design, backend architectures, and Azure cloud services.

Responsibilities

• Develop backend services, RESTful APIs, and microservices using C# or Java.
• Participate in database design and cloud deployments (SQL Server, Azure).
• Apply AI tooling (Cursor, Copilot, MCPs) to accelerate development and prototyping.
• Collaborate with senior engineers on microservices and event-driven architectures (Kafka).

Skills

C#

Java

SQL

Azure

API design

Microservices

Kafka

AI tools

Education

Bachelor's degree in CS (in progress)

Job description

WEX Inc. seeks a Software Engineer Intern to build resilient backend systems and AI-enabled workflows. You will work with engineers and product managers to design scalable APIs, develop microservices, and deploy in cloud environments using modern AI tooling.

You’ll gain real-world experience in API design, backend processing, and data integrations with SQL Server and Microsoft Azure, while learning through mentorship and hands-on projects across multiple locations.