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35 software engineer internship jobs at 22 companies in Leesburg, VA

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Summer 2027 Software Developer Internship
Annapolis Junction, Maryland, United States
$26-$35/hr OnsiteInternship, Full Time
General Dynamics Information TechnologyNYSE: GD: Provides mission-critical IT services to government and defense organizations.
0+ YOERequires 2 years of education toward a computer science, computer engineering, cybersecurity, or similar engineering degree, software development experience or training, programming proficiency, and U.S. citizenship.
C, C++, JavaScript, Java, Python, Rust, TypeScript, AI, cloud, cyber
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Summer 2027 Software Developer Internship
Annapolis Junction, Maryland, United States
$26-$35/hr OnsiteFull Time, Internship
GDIT
GDITNYSE: GD: Delivers IT and mission services to government agencies.
0+ YOEAt least two years toward a computer science, computer engineering, cybersecurity, or related engineering degree; software development training; programming proficiency; U.S. citizenship required.
C, C++, JavaScript, Java, Python, Rust, TypeScript
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2mo
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Junior Software Engineer Internship
Herndon, Virginia, United States
OnsiteInternship
Clarity Innovations
Clarity Innovations: Provides software and data engineering for national security missions.
Pursuing a BS in CS/CE or related field, US citizenship required to obtain Top Secret clearance, experience with Go or Python, understanding of networking and data structures, familiarity with Docker/Kubernetes and CI/CD.
Go, Python, Docker, Kubernetes
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Forward Deployed Software Engineer, Internship - Intel
Washington, D.C., District of Columbia, United States
$10k/mo OnsiteInternship
Palantir
PalantirNasdaq: PLTR: Developing software platforms for data integration and analytics.
Requires active Full Scope Poly Level clearance, engineering background, proficiency in one or more programming languages (Python, Java, C++, TypeScript/JavaScript), ability to travel ~25–50%, and be a final-internship student graduating Winter 2027 or Spring 2028.
Python, Java, C++, TypeScript, JavaScript
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Software Engineer
Arlington, Virginia, United States
$85k-$130k/yr HybridFull Time
InterImage
InterImage: Provides IT modernization and cybersecurity services to federal government agencies.
Bachelor's degree in CS/SE/IS/cybersecurity/math; internship/project experience in software development; analytical; eager to learn Generative AI; strong teamwork and communication; clearance preferred.
Python, Java, JavaScript, Go, REST APIs, microservices, Git/GitLab/GitHub, AWS, Azure, Docker, Kubernetes, React, Angular, data processing, CI/CD, DevSecOps
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Associate Software Engineer
Fort Meade, Maryland, United States
$77k-$128k/yr OnsiteFull Time
ManTech
ManTech: Provides technology solutions for defense and intelligence agencies.
0+ YOEBachelor's in CS or related,0–2 years software development experience or internships,knowledge of Python/Java/JavaScript/C/C++,EMR not mentioned,active TS/SCI with polygraph required.
Python, Java, JavaScript, C/C++, AWS, Docker, Kubernetes, React, Angular
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Software Engineer (2027 Graduates)
McLean, Virginia, United States
$115k-$118k/yr OnsiteFull Time
Appian
AppianNASDAQ: APPN: Provides a low-code platform for enterprise-grade process automation.
Pursuing a BS/MS in Computer Science or Computer Engineering; prior internship or academic experience; strong communication skills; proven fluency with AI and LLMs; ability to work in a collaborative engineering environment.
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Software Engineer 2 (AI) - Hybrid - Reston, VA - Freewheel
Reston, Virginia, United States
$102k-$153k/yr HybridFull Time
Comcast
ComcastNASDAQ: CMCSA: Provides global telecommunications, media content, and entertainment services.
1+ YOERequires 1–2 years of software engineering experience or equivalent internship/co-op experience, Python or similar programming, software fundamentals, and exposure to AI, machine learning, LLMs, or agent-based systems.
Python, LLMs
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4w
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US Military Skillbridge Internship (Software Engineer)_Arlington, VA
Arlington, Virginia, United States
HybridInternship, Full Time
Black Cape
Black Cape: Provides mission software, AI, and data analytics for defense.
2+ YOE2+ years experience preferred, proficiency in at least one OO language (Java, Python, C#, C++), MVC frameworks, relational databases, Linux, web fundamentals; BS degree or near completion preferred; must be willing to obtain TS/SCI CI polygraph.
Google TensorFlow, Python scikit-learn, Java, Python, C#, C++, Spring, Django, Flask, Rails, MySQL, PostgreSQL, sqlite3, Ubuntu, RedHat, CentOS, HTTP, HTML, REST, CSS, JavaScript, NGINX, Apache, Backbone, Angular, Ember, Vue.js, Bootstrap, Less, ElasticSearch, Accumulo, MongoDB, HBase, Amazon Web Services (AWS), JWICS
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Lead Software Engineer, Full Stack (Enterprise Platform Technology)
McLean or Plano
$179k-$225k/yr OnsiteFull Time
Capital One
Capital OneNYSE: COF: Financial services offering credit cards, banking, and loans.
4+ YOE1+ MgmtBachelor's degree, 4+ years software engineering (internship excluded), 1+ year cloud experience, proficiency in JavaScript/Java/TypeScript/SQL/Python/Go, Docker/Kubernetes, AWS/GCP/Azure; people management and AI tooling experience preferred.
JavaScript, Java, HTML/CSS, TypeScript, SQL, Python, Go, Open Source RDBMS, NoSQL, Docker, Kubernetes, AWS, GCP, Microsoft Azure
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2mo
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Software Dev Engineer II, OMHS SCS
Arlington, Virginia, United States
$144k-$194k/yr OnsiteFull Time
Amazon
AmazonNASDAQ: AMZN: Global online retail and cloud computing technology provider.
3+ YOE3+ years non-internship software development; 2+ years design/architecture; 3+ years SDE or related; 3+ years large-scale, multi-tiered software; OO design; Bachelor's in CS/Engineering/Math or related; proficiency in at least one programming language.
C#, C++, Java, Perl
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Test Automation Software Engineer
Laurel, Maryland, United States
$100k-$245k/yr OnsiteAll Commitments Available
Johns Hopkins University Applied Physics Laboratory
Johns Hopkins University Applied Physics Laboratory: Conducts research and engineering for national security and space.
3+ YOEBS in software/engineering; proficiency in C++, C, Python; 3 years embedded software, CI/CD; containerization/virtualization; test automation systems; SCM (Git); strong problem-solving and communication; eligible for interim Secret clearance.
C++, C, Python, Git, GitLab, Bamboo, CI/CD, Docker, Kubernetes, RTOS, VxWorks, Embedded Linux, Test Automation Frameworks
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Software Engineer Intern - Fulton, MD
Fulton, Maryland, United States
$30-$38/hr OnsiteMultiple Commitments Available
ICR
ICR: A research and analytics providing software development services.
Pursuing Bachelor's in CS/CE/EE; strong Python/Java/HTML/JavaScript; software lifecycle experience; Windows/Linux API knowledge; client/server; problem solving; communication; self-motivation; teamwork.
Python, Java, HTML, JavaScript, Windows API, Linux API, Git, Jenkins, CI/CD
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1mo
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2027 Software Engineer Intern
Costa Mesa or Irvine or Atlanta or Seattle or Boston or Reston
$45-$50/yr OnsiteInternship, Full Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
Pursuing a Bachelor\u0002s in CS or related field, rising senior returning to school, proficiency in C++, Go, Rust, Java, or Python, familiarity with algorithms, data structures, cloud and front-end concepts, and U.S. Person status required.
C++, Go, Rust, Java, Python, Lattice OS
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2mo
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Full Stack Software Engineer
Falls Church, Virginia, United States
OnsiteAll Commitments Available
Kastle Systems
Kastle Systems: Managed security services provider for commercial and residential properties.
3+ YOE3-5 years in application development; strong C#, front-end (HTML/CSS/JavaScript); SQL Server backend; Kubernetes/CI/CD experience; excellent US English communication.
C#, JavaScript, HTML, CSS, SQL Server, Kubernetes, CI/CD, Python, PHP
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2mo
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Software Engineering Intern
Annapolis Junction, Maryland, United States
OnsiteInternship
Entegra Systems
Entegra Systems: Provides engineering and intelligence analysis for government missions.
0+ YOEStudent pursuing a Bachelor's in CS/Software Engineering; interest in VR, OO programming; able to learn and work in a team.
Message Queues, DDS, REST, Networking, Data Modeling, Storage, Software Libraries
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1mo
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Intern – Space Software Engineering, National Security Space
Chantilly, Virginia, United States
OnsiteInternship
Redwire
RedwireNYSE: RDW: Manufactures infrastructure and hardware components for diverse space missions.
Currently enrolled in a Bachelor's, Master's, or Ph.D. in a relevant discipline; US work authorization per ITAR; willingness to work on a ~10-week, hands-on internship; background check required; strong teamwork and academic record.
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2mo
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Software / Hardware Engineering - Intern
Annapolis Junction, Maryland, United States
OnsiteFull Time, Internship
Nightwing
Nightwing: Provides advanced cyber and intelligence solutions for national security.
Enrolled in a STEM Bachelor's or Master's program, experience with software programming or hardware logic circuits, ability to obtain and maintain a U.S. government security clearance, submit transcript with GPA and projected graduation date.
Python, C++
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1mo
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Federal AI Solutions Engineer (Entry Level)
McLean, Virginia, United States
$85k-$105k/yr HybridFull Time
A-TEK
A-TEK: Provides digital transformation and scientific solutions to federal agencies.
0+ YOEBachelor's in Computer Science with AI coursework, 0–2 years experience (internships/projects accepted), Python and cloud (AWS/Azure) familiarity, experience with ML/LLMs, ability to obtain Public Trust clearance, and interest in federal missions.
Python, AWS Bedrock, Microsoft Azure OpenAI, LangChain, LlamaIndex, Semantic Kernel, CrewAI, Terraform, AWS CDK, Bicep, ECS, EKS, AKS, REST APIs, Git, Pinecone, Weaviate, FAISS, Milvus, CI/CD, NIST AI Risk Management Framework (AI RMF), FedRAMP, Zero Trust
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Web Application Developer Intern
Falls Church, Virginia, United States
$20/hr OnsiteInternship
Mathtech
Mathtech: Provides consulting and technology services for government agencies.
Pursuing IT/CS degree, familiarity with Laravel or MVC frameworks, PHP and basic SQL, Windows and Linux command-line experience, strong problem-solving and communication skills, must be a U.S. Person per ITAR.
Laravel, Model-View-Controller (MVC), PHP, SQL, Microsoft Windows, Linux command line
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