Cleared Software Engineer Intern - Summer 2027

CACI International; Denver (CO); On-site; USD 28,000 - 39,000; Part time

Job summary

CACI International in Denver, CO invites students for the Cleared Software Engineer Intern - Summer 2027. This on-site, part-time internship offers a startup-like Makalu team environment, agile development, and hands-on work on front-end and back-end components to deliver high-quality software.

You will design architecture for new components, contribute to UI/UX improvements, and gain experience with REST-based services, Java Spring Boot, HTML5/CSS, and Linux scripting in a mission-focused

Qualifications

• Must be currently pursuing an undergraduate or graduate degree in Computer Science or a related field.
• Must be able to obtain and maintain TS/SCI with Poly.
• Entry-level coding experience and familiarity with REST-based services.
• Experience with Agile development and modern web technologies (HTML5, CSS).

Responsibilities

• Assist in designing architecture for new components within an agile Makalu team.
• Collaborate with on-site and remote engineers on front-end and back-end microservices.
• Contribute to improving UI/UX and software baseline.
• Apply proven design patterns and open-source tools to projects.
• Support a positive team atmosphere and proactive problem solving.

Skills

REST-based web services

Agile software development

HTML5 / CSS / JavaScript

Java Spring Boot

Linux shell scripting

Education

Undergraduate or Graduate degree in Computer Science or related field

Tools

Browserify / WebPack / Closure

SASS / Less / Stylus

Job description

Job Title: Cleared Software Engineer Intern - Summer 2027

Job Category: Intern/Co-op

Time Type: Part time

Minimum Clearance Required to Start: TS/SCI with Polygraph

Employee Type: Part-Time On-Call

Percentage of Travel Required: None

Type of Travel: None

Anticipated Posting End: 11/2/2026

The Opportunity:

CACI is seeking a skilled Software Developer for our Summer 2027 Makalu internship program. If you are enthusiastic about creating innovative products and components utilizing modern technologies, this opportunity may be a perfect fit for you. You will be engaging in a dynamic, start-up-like environment focused on new development within an agile framework. This role requires full-time, on-site presence at our locations in Denver, CO, and Sterling, VA.

Responsibilities:

On Team Makalu, typical responsibilities include proactively designing the architecture for new components, while also suggesting ways to improve the application and overall UI/UX. Our team works closely together with on-site and remote engineers developing front-end applications and back-end microservices, all dedicated to creating the best products and user experience possible.

• Day-to-day expectations include solving challenging, but rewarding technical problems, meeting program objectives within the agile development cycle, suggesting ways to improve UX/UI and the software baseline, and introducing new ways to meet mission needs.
• Be part of an agile team where communication skills and the ability to execute within the established development process are paramount to your and the team’s success.
• Work on new technologies, striving to stay customer-focused and thriving on challenges to build new UI applications.
• Utilize industry proven design patterns and open-source tools.
• Contribute to a positive and upbeat team atmosphere.

Qualifications:

Required:

• Must be currently pursuing an undergraduate or graduate degree in Computer Science or a related field.
• Must be able to obtain and maintain a TS/SCI with Poly.
• Entry-level experience and knowledge of coding.
• Experience using REST-based web services.
• Familiarity with Agile software development methodologies.
• Familiarity with modern web technologies and techniques such as HTML5, CSS, CSS pre-processors (e.g. SASS, Less, Stylus), or JavaScript build tools (e.g. Browserify, WebPack, Closure).
• Familiarity with Java Spring Boot.
• Strong organizational skills and attention to detail.
• Strong verbal and written communication skills.
• Experience with Linux environment and Linux shell scripting.

Desired:

• An eagerness to learn a modern infrastructure and be a part of a team supporting mission critical systems.
• Familiarity with real-time communication mechanisms such as WebSockets.