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621 junior software engineer jobs at 251 companies in Gaithersburg, MD

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Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
Help us #BeatIndeed & #BeatLinkedIn
1mo
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Junior Software Engineer
Chantilly, Virginia, United States
$94k-$198k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
0+ YOEBachelor's degree in CS/Software Engineering/Information Systems; TS/SCI with Polygraph; strong software fundamentals; experience with Java, C#, Python, or JavaScript; willingness to learn enterprise platforms and PeopleSoft.
Java, C#, Python, JavaScript, PeopleSoft, Oracle, Git
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1mo
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Junior Software Engineer
Annapolis Junction, Maryland, United States
$70k-$190k/yr OnsiteFull Time
Belay Technologies
Belay Technologies: Provides specialized technology and engineering services to the DoD.
0+ YOEEntry-level software engineer with Python proficiency, production experience, and understanding of AI concepts and streaming data pipelines.
Python, Apache Kafka, Elasticsearch, PydanticAI, Langgraph, DeepAgents, APIs, Software development tooling
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1mo
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Junior Software Engineer
Washington, District of Columbia, United States
$100k-$145k/yr OnsiteFull Time
Visionist
Visionist: Provides software engineering and data analytics for national security.
3+ YOEBachelor's degree in a technical field; 3 years software development; object-oriented programming; multi-INT or complex software systems; strong requirements analysis and documentation; collaboration and communication skills.
Java, C++, Python, Object-oriented programming, Multi-INT analysis tools, Software development tools
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1mo
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Junior Software Engineer
Chantilly, Virginia, United States
$94k-$198k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
TS/SCI with Polygraph required; bachelor’s degree in CS/SE/IS or equivalent; strong software development fundamentals; experience with Java, C#, Python, or JavaScript; understanding of OOP, APIs, SQL, and Git; strong analytical and communication skills.
Java, C#, Python, JavaScript, SQL, Git, PeopleSoft, Workday, ServiceNow, Salesforce, Oracle
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2w
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Junior Software Engineer
Reston, Virginia, United States
$90k-$122k/yr HybridFull Time
Verisign
VerisignNASDAQ: VRSN: Provides internet domain name registry and DNS infrastructure services.
2+ YOE2+ years software development experience, BS in Computer Science or equivalent, proficiency in C/C++/Rust and Python, Linux, CI/CD and infrastructure automation (Terraform, Ansible, Puppet, OpenStack), strong CS fundamentals and communication skills.
Terraform, Ansible, Puppet, OpenStack, Jenkins, Groovy, GitHub, Python Behave, Cucumber, C, C++, Rust, Python, Linux, tcpdump, Docker, Kubernetes
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2d
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Junior Software Engineer
Hanover, Maryland, United States
$110k-$140k/yr OnsiteFull Time
Base-2 Solutions
Base-2 Solutions: Delivers engineering and technology services for national security.
0+ YOEBachelor's in computer science or related (or 4 years experience), TS/SCI with Full Scope Polygraph, no prior software experience required; familiarity with modern languages, tools, and cloud platforms.
Java, C#, C++, JavaScript, Python, Scala, Ruby, Go, Eclipse, NetBeans, IntelliJ IDEA, PyCharm, Microsoft Visual Studio, VS Code, Windows, Unix, Linux, macOS, Atlassian Suite (JIRA, Confluence), GitHub, ServiceNow, Spring, Angular, Bootstrap, Oracle, MySQL, MongoDB, Maven, Jenkins, Docker, Kubernetes, Git, SVN, CVS, AWS, Azure, Google Cloud
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1w
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Junior Software Developer
Washington or Maryland or Virginia
OnsiteFull Time
Akumen
Akumen: Provides technology, cybersecurity, and data services to federal agencies.
2+ YOEBachelor's or equivalent, 2+ years software development experience, proficiency with C#/.NET or Java, JavaScript frameworks (React/Angular), Microsoft Azure and Azure DevOps, RESTful APIs, and relational databases.
C#/.NET, Java, JavaScript, React, Angular, Microsoft Azure, Azure DevOps, RESTful APIs, SQL Server, PostgreSQL, ASP.NET Core, Spring Boot, Docker, Kubernetes, Terraform, Bicep, PowerShell, Python, Bash, CI/CD pipelines
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4w
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Junior Software Engineer
Annapolis Junction, Maryland, United States
OnsiteFull Time
Tiber Technologies: Providing specialized engineering and security services for federal missions.
U.S. citizen with active clearance and polygraph required. Bachelor's in computer science, engineering, or related field required. Proficiency in Java, Python, PySpark, and experience with big-data frameworks (Hadoop, MapReduce, Pig), ETL, JSON/BSON.
Java, Python, PySpark, Pig, MapReduce, JSON, BSON, Hadoop, ETL
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2w
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Junior Software Data Engineer
Fort Meade or Jessup
$104k-$166k/yr OnsiteFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
0+ YOETS/SCI with polygraph required. Bachelor's in CS/Engineering/Math + 2 years software engineering OR Master's/PhD with 0 years OR 6 years experience with HS. Experience with prompt engineering and retrieval-augmented generation (RAG).
Prompt Engineering, retrieval-augmented generation (RAG), AI/ML frameworks, LLMs
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1mo
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Junior Software Developer
Springfield or Arlington
$40k-$80k/yr HybridFull Time
JRAD
JRAD: Provides technical research and defense support to federal agencies.
0+ YOEBachelor's in CS or related, 0-3 years software development experience, Java/Spring preferred, proficiency with OOP, data structures, REST/microservices, databases, containerization, Agile, and security standards; able to pass DHS suitability screening.
Java, C#, C++, ASP.Net, Python, JavaScript, Spring MVC, Spring Boot, SSO, Scala, Http4s, ETL, Node.js, React, Angular, Vue.js, PostgreSQL, MySQL, MongoDB, RESTful APIs, microservices, Docker, Kubernetes, Git, Github, JIRA, SAFe, AWS, Microsoft Azure, Google Cloud Platform, Jenkins, GitLab CI/CD, GitHub Actions, JUnit, PyTest, Jest, OWASP, Section 508, NIST
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1w
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Software Developer/Engineer - Junior
Fairfax, Virginia, United States
$80k-$95k/yr RemoteFull Time
ASM ResearchNYSE: ACN: Provides IT and healthcare services to government agencies.
0+ YOEBachelor's or equivalent experience; 0–3 years software development with at least one modern language; familiarity with Infrastructure-as-Code tools; must meet DoD 8140 and hold active Secret clearance; U.S. citizenship required.
Java, C#, Python, JavaScript, Terraform, Ansible, HTML, CSS
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1mo
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Junior Software Developer
Annapolis Junction or Columbia
$130k-$150k/yr OnsiteFull Time
Freedom Technology Solutions Group
Freedom Technology Solutions Group: Provides geospatial and software engineering solutions for national security agencies.
3+ YOEActive security clearance with polygraph; bachelor\u0002s in a technical discipline (or 7 years' experience) with 3 years software development; front-end experience with JavaScript, Node.js, AngularJS/Angular, Vue.js; documentation experience.
JavaScript, Node.js, AngularJS, Angular, Vue.js, Elastic Search, MongoDB, AWS, Git, EngineX
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2w
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Junior Software Engineer
Warrenton or State College or Fort Eisenhower or Centennial
$95k-$140k/yr OnsiteFull Time
Altamira Technologies
Altamira TechnologiesNYSE: PSN: Provides data analytics and engineering for national security missions.
Bachelor's in CS/CE/EE required. Strong Java and JavaScript/TypeScript skills required. Experience with full-stack technologies (Python, Angular, React, Elasticsearch, containers, Kubernetes) preferred. Top Secret clearance required.
Java, Python, JavaScript, TypeScript, Angular, React, Elasticsearch, ELK Stack, Redis, REST, Docker, LXC, Kubernetes, Helm, Machine Learning, Data Analytics, Android, NoSQL, SQL, Xmidas
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1mo
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DOT Junior Software Developer
Vienna, Virginia, United States
OnsiteFull Time
Savan Group
Savan Group: Data and information management consulting for federal government agencies.
2+ YOEBachelor's in Computer Science or related, minimum 2 years software development experience, proficiency with Angular/C#/ .NET/SQL/HTML/CSS/JavaScript/Less, unit testing, Agile experience, U.S. citizenship and ability to obtain Public Trust.
Angular, C#, .NET, SQL, HTML, Bootstrap, CSS, JavaScript, Less, REST APIs, CI/CD, AWS, Azure, Google Cloud Platform
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2w
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Junior Software Developer
Annapolis Junction, Maryland, United States
$55k-$106k/yr OnsiteFull Time
Nightwing
Nightwing: Provides advanced cyber and intelligence solutions for national security.
2+ YOE2+ years Python and Java development, IDA/Ghidra plugin/script experience, x86 assembly, testing with JUnit/Pytest, familiarity with LLM inference tooling (Langchain, Langchain4j), grpc, Agile experience, BS in Computer Science related field, willingness to obtain security clearance.
Python, Java, IDA, Ghidra, x86 Assembly, JUnit, Pytest, Langchain, Langchain4j, Embedding Stores, MCP Servers, gRPC
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6d
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Junior Software Engineer (Frontend Focused)
Annapolis Junction, Maryland, United States
OnsiteFull Time
BigBear.ai
BigBear.aiNYSE: BBAI: AI-powered decision intelligence for complex mission environments.
3+ YOEActive TS/SCI with Poly clearance; 3+ years software engineering with a Bachelor’s in a technical discipline (or 7+ years experience); strong JavaScript/TypeScript, HTML, CSS; React/Angular; relational DBs; Docker, Git, Linux.
JavaScript, TypeScript, HTML, CSS, React, Angular, PostgreSQL, SQLite, MySQL, Docker, Git, Linux, FastAPI, Spring Boot, Vue.js, Java, Python, Bash, PowerShell, Elasticsearch, MongoDB, GitLab CI, Kubernetes, Ansible, AWS
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1mo
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Junior Software Developer Engineer - Chantilly, VA
Chantilly, Virginia, United States
$90k-$140k/yr OnsiteFull Time
ICR
ICR: Specializes in government software solutions.
1+ YOEBachelor’s in STEM, TS/SSBI eligible, 1+ year professional software development and design/architecture experience, proficient in at least one programming language.
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1w
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Junior/Mid-level Software Engineer
Washington, District of Columbia, United States
$100k-$120k/yr OnsiteFull Time
Envisioneering
Envisioneering: Provides engineering, R&D, and electronic warfare solutions for defense.
1+ YOEBS in Engineering/CS, active U.S. Secret clearance, 1+ years Python development experience, familiarity with Windows/Linux, instrument integration, and data processing/analysis.
Python, NumPy, SciPy, matplotlib, seaborn, Bokeh, HDF5, GitLab, C++, gcc, cmake, Visual Studio, Linux, Windows, VISA, TCP/IP
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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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2w
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Junior Software Developer - TS/SCI
Herndon or Chantilly
$88k-$155k/yr OnsiteFull Time
Parsons
ParsonsNYSE: PSN: Provides engineering and technology services for infrastructure and defense.
2+ YOETop Secret/SCI required. Bachelor’s degree in EE/CS/CE or related, 2+ years software development experience, proficiency with Python and C/C++, Linux, Git; experience with AWS, Docker, Kubernetes, and ML frameworks preferred.
Python, C/C++, Linux, Git, Amazon Web Services (AWS), Docker, Kubernetes, PyTorch, TensorFlow, X-Midas, OpenCV, Keras, Qt/PyQt, Android, GitLab CI/CD, CUDA
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