Apply on Employer Site

CACI International Inc · 19 hours ago

Software Engineering Intern – Summer 2026

Lisle, IL

Internship

Onsite

Intern

$44K/yr - $88K/yr

Start in 2026 Spring

CACI International Inc is a company recognized for its innovative workforce and technology solutions. They are seeking Software Engineering Interns to work closely with seasoned engineers on projects involving software development, algorithm optimization, and research paper writing during the Summer of 2026.

Information TechnologyService IndustrySoftware

Comp. & Benefits

No H1B

U.S. Citizen Only

Responsibilities

Under direct supervision and guidance, work closely with other interns, as well as seasoned engineers, on projects that expose them to leading edge telecommunications technology

You will perform work under close mentor guidance including but not limited to:

Development of software

Algorithm development and optimization

Research paper writing

Qualification

Computer ScienceAlgorithm DevelopmentC/C++PythonGitGNU/LinuxNetworkingSecurityVulnerability ResearchInterpersonal CommunicationTeamwork

Required

Currently pursuing an undergraduate or graduate degree in Computer Science, Computer Engineering, Electrical Engineering or related field

Must be legally authorized to work in the United States without the need for employer sponsorship, now or at any time in the future

Must be able to obtain and maintain applicable security clearance

Broad computer science/computer engineering background including broad knowledge of algorithm and data structure implementation

Experience and interest in some of the following technology areas desired: Networking, Security, Vulnerability research; etc

Knowledge of Microsoft software applications and other software applications as required

Experience with high-level programming languages such as C/C++

Experience with scripting languages such as Python

Experience with source code management tools such as Git

Experience with GNU/Linux software development and toolchains

Interest in algorithms, data structures, and computational complexity

Preferred

Minimum GPA of 3.0 or higher is preferred, not required

Previous internship/co-op or other work experience, leadership and teamwork capabilities, interpersonal communication skills, and activities (professional/community/extracurricular)

Benefits

Healthcare

Wellness

Financial

Retirement

Family support

Continuing education

Time off benefits

Company

CACI International Inc

Glassdoor4.0

At CACI International Inc (NYSE: CACI), our 25,000 talented and dynamic employees are ever vigilant in delivering distinctive expertise and technology to meet our customers’ greatest challenges in national security.

Founded in 1962