Junior Software Engineer Python Jobs in Culpeper, VA, US

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Junior Software Engineer

Warrenton or State College or Fort Eisenhower or Centennial

OnsiteFull Time

Altamira TechnologiesNYSE: PSN: Provides data analytics and engineering for national security missions.

Bachelor’s in CS/CE/EE or related field; strong Java and JavaScript/Typescript experience; experience with Python, Angular, ELK, Redis, REST, Docker/Kubernetes; TS/JS stack experience preferred; Must have Top Secret clearance.

Java, JavaScript, TypeScript, Python, Angular, React, ElasticSearch, ELK stack, Redis, REST, Docker, Kubernetes, Helm, NoSQL, SQL, Xmidas

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Junior Software Engineer - Intern

Fairfax, Virginia, United States

OnsiteInternship

ECSNYSE: ASGN: Provides advanced technology and engineering services to government agencies.

US Citizen; pursuing Bachelor's or Master’s in Computer Science or Engineering; programming in Python, C++, Java; Linux familiarity; strong teamwork, writing, and presentation skills; ability to learn quickly in a fast-paced environment; self-motivated.

Python, C++, Java, Linux

1mo

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1mo

Junior Software Engineer

Ashburn, Virginia, United States

OnsiteFull Time

Cardinal Technology Systems: Provides cybersecurity and IT solutions to government agencies.

3+ YOEBachelor’s degree required; 3+ years experience; CBP suitability eligibility; databases, web apps, and interfaces; strong communication.

Python, SQL, Java

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Junior Software Engineer

Chantilly, Virginia, United States

OnsiteFull Time

Bridge Core: Provides technical services and cybersecurity solutions to government agencies.

3+ YOEBS degree with 3-5 years of experience; Java/Springboot/AWS; REST APIs; Linux; scripting; Git; CloudFormation; PKI is desirable.

Java, Spring, AWS, Git, CloudFormation, Docker, Kubernetes, PostgreSQL, MySQL, Linux, Python, Bash, XML, JSON, YAML

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Junior Software Developer

Springfield or Merrifield

$79k-$170k/yr HybridFull Time

AmentumNYSE: AMTM: Provides engineering, technology, and mission support to government agencies.

6+ YOEBachelor's plus 2 years or Associate's plus 4 years or 6+ years in related field; AWS, GitLab, API design, Java/Python/JavaScript experience; TS/SCI with Poly clearance.

AWS, GitLab, Java, Python, JavaScript, CDK, Solr, Jira, Confluence

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Junior Software Developer

Fort Belvoir, Virginia, United States

OnsiteFull Time

Applied Research Associates: Provides scientific research and engineering solutions for complex problems.

2+ YOEBS/MS in CS/Software Eng; 2+ years experience or MS; proficient in Java, Python, Golang; web tech HTML/CSS/JS and frameworks (Angular, Vue, React); Agile, Git, CI/CD; strong documentation.

Java, Python, Golang, HTML, CSS, JavaScript, Angular, Vue, React, Git, CI/CD, Docker, Kubernetes, PostgreSQL, MySQL, Redis, MongoDB

1mo

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1mo

Software Engineer - Java, Python, node.js, JavaScript, HTML (2026-0065)

Reston, Virginia, United States

OnsiteFull Time

Acclaim Technical Services: Provides language and intelligence services to U.S. federal agencies.

2+ YOEBachelor's degree in engineering or related field; 2+ years software engineering experience; proficiency in Java, Python, Node.js, JavaScript, HTML.

Java, Python, Node.js, JavaScript, HTML

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Software Engineer (Level 1)

Dulles, Virginia, United States

$76k-$114k/yr OnsiteFull Time

Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.

0+ YOEBachelor's degree or 0 years experience; software development with Python, C++, Bash; US citizenship; ability to obtain Top Secret clearance.

Python, C++, Bash, PostgreSQL, Ansible, Cloud infrastructure, PKI, Static code analysis

2mo

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2mo

Software Engineer

Tampa or Fort Belvoir

OnsiteFull Time

Odyssey Systems: Providing technical and engineering services to federal government agencies.

3+ YOEUS citizen; active secret clearance with ability to obtain TS/SCI; bachelor’s in CS/IS or related field with 3–6 years of experience; proficiency in Java/C#/Python/JS/TS; Git; REST/microservices; team collaboration; strong communication.

Java, C#, Python, JavaScript, TypeScript, Git, RESTful APIs, microservices, CI/CD, Docker, Kubernetes, Databases

1mo

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1mo

Junior Full Stack Software Engineer (DevSecOps)

Herndon, Virginia, United States

$80k-$128k/yr OnsiteFull Time

Peraton: National security and mission-critical government technology services provider.

2+ YOEBachelor’s or Master’s in relevant field; 2+ years of experience; active TS/SCI with poly; proficiency in Java, Python, JavaScript; REST/JSON; Docker; AWS; CI/CD.

React, Angular, Java, Python, FastAPI, Flask, PostgreSQL, MongoDB, DynamoDB, Elasticsearch, AWS, Docker, Kubernetes, Jenkins, GitLab CI, GitHub Actions, Terraform, CloudFormation, Cypress, Selenium, JUnit, Pytest, Jest, Confluence, Jira, OAuth, JWT, Swagger, REST API

1mo

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1mo

Modernization Engineer (Junior)

Manassas, Virginia, United States

OnsiteFull Time

Spear AI: Develops AI software and sensors for maritime defense operations.

0+ YOESoftware engineer with Rust, C/C++, Docker/Kubernetes, CI/CD, Terraform or Pulumi, Python; Kafka/Redpanda experience; IoT, GIS a plus; passionate about code quality and performance.

C/C++, Rust, Kafka/Redpanda, Docker, Kubernetes, CI/CD, Terraform, Pulumi, Python

2mo

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2mo

Entry Level Software Developer

Sterling, Virginia, United States

HybridFull Time

Nightwing: Provides cybersecurity and intelligence solutions for government agencies.

0+ YOEBachelor's in CS/Software Engineering or related field; less than 2 years' experience; ability to obtain US government security clearance; US citizenship.

Git, Java, Python, AWS, Azure, SCRUM

3mo

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3mo

Software Engineer (TS/SCI) {S}

Chantilly, Virginia, United States

OnsiteFull Time

ARKA Group: Develops advanced technology solutions for space and defense missions.

4+ YOEActive TS/SCI clearance; degree in CS/EE/Physics or related field or 4 years software/signals experience; interest in remote sensing; proficient in Python/C++/Rust or similar; Linux and/or AWS familiarity.

Python, C++, Rust, Linux, AWS

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Intern- Software Engineer

Herndon, Virginia, United States

$25/hr HybridInternship

Vbrick: Secure enterprise video platform for live and on-demand streaming.

0+ YOEPursuing a Bachelor's degree in Computer Science or Engineering; strong programming skills; knowledge of databases; AI/ML fundamentals; good communication; eager to learn.

Java, Python, JavaScript, C#, SQL, NoSQL, HTML, CSS, GitHub Copilot, ChatGPT, Claude

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Associate Software Engineer

Manassas, Virginia, United States

OnsiteFull Time

VTG: Provides force modernization and digital transformation for defense agencies.

Bachelor’s or master’s in STEM; experience with Java, C++, Python; Git; Linux; US citizen with ability to obtain SECRET clearance; background check.

Java, C++, Python, Git, GitHub, GitLab, Linux, RHEL, Kubernetes, Docker, Podman, KVM, Helm, Jenkins, Ansible, GitOps, Nexus, Robot Framework, Shell scripting, CI/CD, Networking

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Software Engineer - CTJ - Poly

Reston or Annapolis Junction

$84k-$165k/yr OnsiteFull Time

Microsoft: Provides software, cloud computing, and hardware technology products.

0+ YOEBachelor's degree in computer science or related technical field; experience coding in multiple languages including C, C++, C#, Java, JavaScript, or Python; ability to obtain security clearance.

C, C++, C#, Java, JavaScript, Python

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Cleared Software Engineer

Chantilly, Virginia, United States

$69k-$116k/yr OnsiteFull Time

General Atomics: Designs and manufactures unmanned aircraft and nuclear technology systems.

0+ YOEBachelor's in CS/IS or related field; strong programming knowledge; experience with Java, Scala, Python, Golang; AWS, Kubernetes, Docker; CI/CD tooling; DoD/Intelligence Community exposure preferred.

Java, Scala, Python, Golang, Kubernetes, Docker, AWS, Gitlab CI/CD, ArgoCD, CircleCI, Jenkins, Kafka, NiFi

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Associate Software Engineer

Reston, Virginia, United States

OnsiteFull Time

Metron: Develops scientific software and mathematical models for national security.

Bachelor’s degree in computer science, mathematics, physics, or related field; proficiency in Java, TypeScript, Python, or C++; strong OO programming; full-stack web development experience; US citizenship with eligibility for security clearance.

Java, TypeScript, Python, C++, MongoDB, RabbitMQ, Spring Boot, React, Redux, WebGL, OpenGL

1mo

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1mo

Backend Software Engineer

Reston, Virginia, United States

RemoteFull Time

Game Plan Tech: Building secure cloud and AI systems for government.

Back-end developer proficient in Java or Python, databases (SQL/NoSQL), Git/CI/CD, cloud platforms (GCP/AWS/Azure), containers (Docker/Kubernetes), and REST APIs.

Java, Python, Git, CI/CD, Docker, Kubernetes, GCP, Azure, AWS, SQL, NoSQL, REST APIs

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AWS Geospatial Software Engineer

Springfield or Chantilly or McLean or Reston

$87k-$198k/yr OnsiteFull Time

Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients

5+ YOE5+ years software with cloud-first development; 5+ years backend (Java, Python, Go, C++), frontend (JavaScript/TypeScript/HTML/CSS); 3+ years geospatial data processing and spatial algorithms; 3+ years AWS services and cloud-native patterns; 3+ years Infrastructure as Code; containerization experience; TS/SCI with polygraph; Bachelor's degree.

Java, Python, Go, C++, JavaScript, TypeScript, HTML, CSS, AWS, ECS, EKS, Lambda, SQS, SNS, EC2, RDS, DynamoDB, IAM, Terraform, CloudFormation, CDK, Docker, Kubernetes

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Junior Palantir / Maven Product Engineer

Herndon, Virginia, United States

OnsiteFull Time

NetCentrics: Secures government infrastructure through cybersecurity and IT services.

3+ YOEBachelor’s degree in CS/Engineering/Data Science or related field; 1–3 years software/data engineering; Python/Java/Go/TypeScript; cloud infra AWS/Azure/Kubernetes; secure environments; Secret clearance; TS/SCI eligibility.

Python, Java, Go, TypeScript, AWS, Azure, Kubernetes

3mo

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3mo

Software Engineer (TS/SCI) {S}

Chantilly, Virginia, United States

OnsiteFull Time

ARKA Group: Provides advanced technology solutions for space and defense missions.

Active TS/SCI clearance; degree in CS/EE/Physics or related; programming in Python/C++/Rust; Linux/cloud experience; onsite work; strong problem-solving.

Python, C++, Rust, Linux, AWS

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Chapter Next Returnship - Software Engineer (Java, C++)

Manassas, Virginia, United States

OnsitePart Time

Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.

1+ YOEBachelor's in CS/Software/Computer Engineering plus 1 year exp; Linux/Unix; Java/C++ development; Bash/Python scripting; US Citizenship; security clearance required.

Java, C++, Linux, Unix, Bash, Python

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Software Development Engineer I

Washington or Reston or San Diego or San Francisco or Wilmington or Phoenix or Los Angeles or Houston or Boston or Austin or Atlanta or Raleigh or Baltimore or New York or Dallas or Palo Alto or Short Hills or Minneapolis or Chicago or Seattle or Philadelphia or Miami

$37-$59/hr HybridFull Time

DLA Piper: Global law firm providing comprehensive legal and business services.

1+ YOE1-3 years programming with Node.js, Python, C#, Razor, MVC; SQL databases; JavaScript frameworks; HTML/CSS; strong communication.

Node.js, Python, C#, Razor, MVC, Visual Studio Code, MS Graph, APIs, Git, Azure DevOps, SQL, HTML, CSS, JavaScript

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Jr Full Stack Developer (Python/React.js)

Reston, Virginia, United States

$70k-$100k/yr OnsiteFull Time

Inadev: Provides digital engineering and AI solutions to government and businesses.

2+ YOEBachelor's in CS/Engineering; 2+ yrs Python and React; experience with AI-assisted development; microservices; Agile/Jira; US citizen; located in DC metro area.

Python, React.js, GitHub Copilot, Microservices, JIRA, AWS, Docker, Kubernetes, PostgreSQL, MongoDB, DynamoDB

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Cleared Software Engineering Manager

Charlottesville, Virginia, United States

$126k-$230k/yr OnsiteFull Time

General Atomics Aeronautical Systems: Designs and manufactures unmanned aircraft and radar systems.

11+ YOE2+ MgmtLead a software team; 2+ years in software engineering management; strong backend/analytics; DoD security clearance; agile experience.

Java, Python, Scala, Kafka, AWS, NiFi, GeoMesa

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Cyber Software Engineering Intern

Herndon, Virginia, United States

OnsiteInternship

Lockheed MartinNYSE: LMT: Designs and builds aerospace and defense technology systems.

Enrolled in Computer Science/Engineering; experience in C/C++/Python; Linux; US citizenship; ability to obtain government clearance.

C, C++, Python, Linux

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2026 Emerging Missions Flight Dynamics Engineer

El Segundo or Huntsville or Chantilly or Colorado Springs or Albuquerque

$100k-$140k/yr HybridFull Time

The Aerospace Corporation: Provides technical expertise and research for national space programs.

1+ YOEMaster’s or PhD in engineering/science; 0-1 years experience; astrodynamics, trajectory design, software; C/C++, Python, MATLAB; travel; ability to obtain security clearance.

C, C++, Python, Fortran, MATLAB

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Game Simulation Developer Intern

Fredericksburg, Virginia, United States

OnsiteInternship

Obsidian Solutions Group: Delivers technology-enabled and mission-oriented solutions to government agencies.

0+ YOEPursuing a Bachelor's or Master's in CS/Game Development/Software Engineering; experience with C#/C++/Python/JavaScript; familiarity with Unity or Unreal; strong problem solving; team, independent work; photo editing.

Unity, Unreal Engine, C#, C++, Python, JavaScript, Adobe Photoshop, Adobe Illustrator, Git

1mo

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1mo

National Security Solutions (NSS) Internship – Software Engineering Intern

Chantilly, Virginia, United States

OnsiteInternship, Full Time

KBRNYSE: KBR: Provides engineering, technology, and professional services for global markets.

Pursuing science or engineering degree; proficient in Python and/or MATLAB; strong math and problem solving; able to work independently and in a team; clear communication.

Python, MATLAB

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Software Engineering Associate Consultant (Graduating Dec 2025- Summer 2026)

Charlotte or Reston or Richmond

HybridFull Time

CapTech: Provides technology and management consulting services to large enterprises.

0+ YOEEntry-level software engineering role; bachelor’s or accelerated master’s in CS/CE/IT with graduation Dec 2025 or Spring/Summer 2026; internship/ project experience; strong communication and analytical skills.

Java, NET, CSharp, Python, Go, Android, iOS, JavaScript, React, Angular, Node.js, AWS, GCP, Azure

1mo

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1mo

AI Prompt Engineer

Ashburn, Virginia, United States

$61k-$122k/yr HybridFull Time

CACINYSE: CACI: Provides information technology and professional services to government clients.

0+ YOEBachelor's in CS/Software Eng/IT or related; 0–3 years software development; experience with Large Language Models; Python or JavaScript/TypeScript; familiar with prompt engineering; willing to work hybrid onsite in Ashburn, VA

Python, JavaScript/TypeScript, Large Language Models

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Support Engineer - FreeWheel

New York or Reston

$53k-$80k/yr OnsiteFull Time

ComcastNASDAQ: CMCSA: Provides global telecommunications, media content, and entertainment services.

0+ YOEBachelor's in CS/Engineering or related; experience in online advertising tech; strong SQL, scripting, REST APIs; familiarity with IAB/VAST; data analysis and web tech; good communication.

SQL, RESTful APIs, Python, JavaScript, HTML5, XML, cURL

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Engineering Apprentice (Software/Systems/Hardware)

Manassas, Virginia, United States

OnsiteFull Time

Lockheed MartinNYSE: LMT: Provides aerospace, defense, and security technology and systems.

Recent high school graduate; full-time onsite in Manassas, VA; eager to learn; strong problem-solving; Windows/Microsoft proficiency; US citizen; ability to obtain DoD Secret clearance.

Linux, Jira, Python, Bash, Java, C++, SQL, Virtual Machines, Containers/Kubernetes, MATLAB

1mo

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1mo

Research Engineering Interns

State College or Reston

OnsitePart Time

Penn State University: Provides higher education and conducts extensive academic research programs.

0+ YOECompletion of sophomore year in Electrical Engineering, Computer Science, or Computer Engineering; strong communication; interest in software, hardware, signal processing, or RF; moderate programming skills.

Python, MATLAB, C, C++, LabView

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AI/ML Intern

Reston, Virginia, United States

OnsiteInternship

Empower AI: Provides AI-enabled IT solutions for federal government agencies.

0+ YOEPursuing a degree in CS/Data Science/Engineering; strong Python/ML basics; ML pipelines; platform integration; good communication.

Python, PyTorch, Pandas, Hugging Face, REST, SDK, ServiceNow, Azure OpenAI

2mo

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2mo

Intern - Undergraduate

Herndon, Virginia, United States

$16-$17/hr OnsiteInternship

DeltekNYSE: ROP: Software and information solutions for project-based businesses.

0+ YOEPursuing or completed bachelor’s in CS/engineering/data science; 0-1 years software/AI experience; strong AI/ML coursework; internship preferred.

Java, Python, SQL, PostgreSQL, Git, IDEs, Prompt Engineering, LLMs, Machine Learning

1mo

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1mo

UICC Engineering Intern (Dulles, VA, US)

Dulles, Virginia, United States

OnsiteInternship

Giesecke+Devrient: Sells security products for banknotes, payments, and digital identities.

0+ YOECurrent college student pursuing a Bachelor's or Master's in computer science/engineering; 2 years completed. Proficient in C++, Java, Python, C#; experience with SQL databases; proficient with Microsoft Office; good written and verbal communication; able to work independently.

C++, Java, Python, C#, SQL, MySQL, Microsoft Office

2mo

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2mo

Intern (Application Development)

Reston, Virginia, United States

$19-$23/hr RemoteFull Time

American College of Radiology: Provides medical imaging accreditation and radiology professional standards.

Pursuing a degree in Computer Science, Software Engineering, Information Systems or related field; strong communication and technical writing; team collaboration; detail-oriented; able to work independently.

HTML, CSS, JavaScript, .NET, Python, C#, Java, Node.js, Okta, OAuth 2.0, OpenID Connect, Azure DevOps, Git, AWS, GitHub Copilot, Cursor