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66 software internship jobs at 52 companies in Washington, DC

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Software Development Summer Internship
Alexandria, Virginia, United States
OnsiteInternship, Seasonal
SimonComputing
SimonComputing: Develops software and IT solutions for government agencies.
2+ YOE2+ years of Java coding (school or other venues), strong problem-solving, interest in software development, ability to work in Agile teams and learn full‑stack technologies.
Java
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1mo
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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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3w
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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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2mo
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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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2w
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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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3d
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Software Engineering Intern
McLean, Virginia, United States
$50/hr OnsiteFull Time, Internship
Appian
AppianNASDAQ: APPN: Provides a low-code platform for enterprise-grade process automation.
Currently pursuing a Bachelors or Masters in Computer Science or Computer Engineering; full-time 40hr/week availability for a 10-week summer internship; strong AI/LLM fluency and foundational CS knowledge.
AI, LLMs, Appian
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2mo
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Software Engineering Intern
Washington, District of Columbia, United States
HybridInternship
Social Impact
Social Impact: Provide management consulting for global development effectiveness.
0+ YOEPursuing CS/SE/Data Science degree; strong problem-solving; able to work independently and with others; interest in scalable enterprise systems; US citizen; DC area; internship; background check.
Node.js, React, Python, PostgreSQL, REST APIs, Git/GitHub
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1mo
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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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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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2mo
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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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2mo
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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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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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2w
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Appian Intern (Paid Internship)
Washington, D.C. or United States
$20/hr HybridInternship, Full Time
Horizon Industries
Horizon Industries: Provides IT and management consulting services to government clients.
Bachelor's in a technical field required; strong analytical, communication, and teamwork skills; eagerness to learn Appian low-code development; preferred familiarity with Java/Python/JavaScript/SQL and Agile.
Appian, Java, Python, JavaScript, SQL
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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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1mo
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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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1w
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Fall Internship, International Advocacy
Washington, District of Columbia, United States
$25-$35/hr OnsiteInternship
PhRMA
PhRMA: Advocates for public policies supporting biopharmaceutical research and innovation.
Current student or recent graduate with interest in health policy, quantitative methods, and pharma industry; experience with statistical software and Excel; strong synthesis, organizational, and communication skills.
SQL, SAS, Stata, R, Python, Microsoft Excel
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1mo
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Fall 2026 IT and Cybersecurity Undergraduate Internship
New York City or Washington
$18/hr OnsiteInternship
Brennan Center for Justice
Brennan Center for Justice: Advocates for democracy and justice through research and litigation.
Undergraduate student; basic cybersecurity knowledge, familiarity with Windows/macOS, Microsoft 365, Zoom, and Slack; beginner hardware/software and networking skills; AV and help-desk experience a plus; strong communication and discretion.
Windows, macOS, Microsoft 365 (Office), Zoom, Slack, endpoint protection, vulnerability scanners, security monitoring, MFA
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2mo
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Senior Software Developer (Java/J2EE/Application Modernization)
Rockville, Maryland, United States
$65-$75/hr HybridAll Commitments Available
CTIS
CTIS: Independent information technology and services firm that provides IT staffing and consulting.
5+ YOESenior Java/J2EE developer for cloud migration with 5+ years in AWS, Java, and modernization.
Java, J2EE, Spring, Hibernate, JSF, AWS, EC2, ECS, EKS, S3, RDS, API Gateway, Lambda, Docker, Kubernetes, CloudFormation, Terraform
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