Full-Stack Software Development Intern

What We Do: The SEI helps advance software engineering principles and practices and serves as a national resource in software engineering, computer security, and process improvement. The SEI works closely with defense and government organizations, industry, and academia to continually improve software-intensive systems. Our core purpose is to help organizations improve software engineering capabilities and develop or acquire the right software, defect free, within budget and on time, every time.

Position Summary You will work as a part of the Cyber Mission Readiness Directorate within CERT and will collaborate with a team of software engineers, learning engineers, and cybersecurity experts focused on building the software behind cyber training, exercises, and assessments.

You will assist members of the Operational Readiness and Evaluation team in developing features and fixes for a suite of open-source web applications used to run cyber exercises, virtual labs, and online courses.

You will write automated tests and help find and fix defects before applications are used in live training events.

You will help add learner activity tracking (xAPI) and AI-assisted features to existing applications.

This internship begins in Fall 2026, with the option to continue through the Spring 2027 semester.

You will contribute to a variety of core functions including:

• Full-stack web application development (C#/.NET and Angular)
• Learning management system plugin development (PHP and Moodle)
• Automated unit, integration, and end-to-end testing
• xAPI instrumentation and AI feature integration

Requirements:

• Enrolled in a degree granting program.
• Willingness to travel to various locations to support the SEI’s overall mission. This includes within the SEI and CMU community.
• You will be subject to a background check and must be eligible to work in the United States without Visa sponsorship.

Knowledge, Skills and Abilities:

• Ability to critically think and problem solve
• Familiarity with an object-oriented programming language, such as C#, Java, or TypeScript
• Familiarity with web development fundamentals, such as HTTP, REST APIs, HTML, and CSS
• Familiarity with Git and collaborative workflows, such as branching and merge requests
• Ability to collaborate internally and externally with professional engineers, instructional designers, and subject matter experts
• Willingness to learn new technologies with cross-functional teams
• Must be organized, detail-oriented, and have the capacity to clearly document and communicate any findings

Desired Experience:

• Experience with ASP.NET Core or Angular
• Experience with PHP or a learning management system, such as Moodle
• Experience writing automated tests, such as with Playwright, xUnit, or Jest
• Experience with relational databases, such as PostgreSQL

These experiences may also come from education-driven experiences or extracurriculars.

Job Function Breakdown:

• Implement features and fixes in web application front ends and APIs: 40%
• Write automated unit, integration, and end-to-end tests: 25%
• Instrument applications for xAPI and integrate AI-assisted features: 20%
• Write documentation and demonstrate work to the team: 15%

TOTAL = 100%

This is a part-time, fully onsite position based in our Pittsburgh office.

Carnegie Mellon University is an Equal Opportunity Employer/Disability/Veteran.

Location Pittsburgh, PAJob Function Non-CMU StudentsPosition Type Intern (Fixed Term)Full time/Part time Part timePay Basis

HourlyMore Information:

• Please visit “Why Carnegie Mellon” to learn more about becoming part of an institution inspiring innovations that change the world.
• Click here to view a listing of employee benefits
• Carnegie Mellon University is an Equal Opportunity Employer/Disability/Veteran.
• Statement of Assurance