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1,072 junior python jobs at 368 companies in Leesburg, VA

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Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
Help us #BeatIndeed & #BeatLinkedIn
1mo
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CNO Python Developer
Fort Meade, Maryland, United States
OnsiteFull Time
Set of X
Set of X: Provides specialized engineering services for U.S. national security missions.
2+ YOEBachelor's in CS +2 years programming or HS +6 years; experience with Python and Python task automation, object-oriented analysis & design, software version control, and knowledge of JSON and YAML; TS/SCI with polygraph required.
Python, JSON, YAML, SQL, NoSQL, Subversion, Git, Confluence, Jira, Crucible, TCP/IP, Agile, Scrum, TDD, Waterfall
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2w
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Mighty Python Developer
Bethesda, Maryland, United States
OnsiteFull Time
Black Cape
Black Cape: Provides mission software, AI, and data analytics for defense.
1.5+ YOEActive Top Secret/SCI required (willingness for CI Poly),Bachelor's degree,1.5+ years professional experience,proficiency in Python,PostgreSQL,Docker,experience in classified environments and model operationalization.
Google TensorFlow, Python, PostgreSQL, Docker, MacOS, Windows, Linux, Elasticsearch, GitLab, Git LFS, GitLab CI, Pydantic, DeepEval, REST, GraphQL, RedHat, Alpine, Kubernetes, OpenShift, LoRA
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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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3mo
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Junior Software Engineer
Columbia, Maryland, United States
$115k-$160k/yr OnsiteFull Time
Visionist
Visionist: Provides software engineering and data analytics for national security.
3+ YOE3 years software development, strong Python, production apps, AI concepts, Kafka/Elasticsearch, bachelor’s in technical field.
Python, Kafka, Elasticsearch, PydanticAI, LangGraph, DeepAgents
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1mo
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Junior Data Scientist
Fort Meade, Maryland, United States
$120k-$127k/yr OnsiteFull Time
Lentech
Lentech: Provides mission-critical IT and engineering solutions for government agencies.
1+ YOE1+ years in statistics or related math, Python or R, collaborative work, TS/SCI clearance with polygraph, HS diploma or GED.
R, Python
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2mo
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Junior Data Scientist
Arlington, Virginia, United States
HybridFull Time
Aitheras
Aitheras: Provides IT consulting, managed cybersecurity, and data analytics services.
1+ YOE1-3 years in data science/analytics; Python, R, SQL; Tableau; ML/NLP; bachelor’s in a quantitative field; US citizenship for clearance.
Python, R, SQL, Tableau, Excel, Jupyter, Git, AWS, pandas, NumPy, scikit-learn, spaCy, Keras, tidyverse, tidymodels, ggplot2, Shiny, NLP, BERT, dashboards, data visualization, statistical modeling
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2mo
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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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2mo
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Junior Network Engineer
Sterling, Virginia, United States
OnsiteFull Time
Secunetics
Secunetics: Optimizes and secures enterprise network infrastructures with intelligence services.
1+ YOE1+ years network administration; degree in CS/EE/CE; strong understanding of networking protocols; scripting with Python/Bash; CI/CD experience; routing tech (OSPF/BGP/EIGRP/EVPN); IT performance and security monitoring; excellent communication.
LDAP, SAML, OAuth 2.0, SSH, SFTP, SCP, SNMPv3, Netflow, SMTP, Python, Bash, CI/CD, TCP/IP, traffic analysis, TAPs, traffic brokers, OSPF, BGP, EIGRP, EVPN, SDLC, systems engineering, IT performance management, IT operations, operational monitoring, security monitoring, KPI
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1mo
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Junior Application Developer
Annapolis Junction or Columbia
$140k-$190k/yr HybridFull Time
Freedom Technology Solutions Group
Freedom Technology Solutions Group: Provides geospatial and software engineering solutions for national security agencies.
3+ YOEActive TS/SCI with Polygraph; Bachelor in CS/Software Eng/IS plus 3 years of software dev; Master’s plus 1 year; 4-year substitution option; Python, Django, Docker, AWS, Java, JavaScript, ReactJS/Vue.js; Agile experience.
Python, Django, Docker, AWS, Java, JavaScript, ReactJS, Vue.js, PostgreSQL, HTML, CSS
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1mo
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Junior DevSecOps Engineer
McLean, Virginia, United States
HybridFull Time
BLN24
BLN24: Delivers digital innovation and strategic communications for federal agencies.
1+ YOE1-2 years DevOps, 1+ year AWS and GitLab CI/CD, strong Docker/Kubernetes, scripting, Terraform or AWS CDK; Linux, Git; security and compliance knowledge.
React, Python, Node.js, AWS EKS, GitLab CI/CD, Terraform, Docker, Kubernetes
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2mo
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Junior RF Analyst
Springfield or Chantilly
OnsiteFull Time
KBR
KBRNYSE: KBR: Provides engineering, technology, and professional services for global markets.
Master’s with 1 year experience or Bachelor’s with 2 years, or no degree with 4 years; TS/SCI clearance with adjudicated polygraph; RF/EMI concepts and test experience; ability to develop plans and analyze results.
MATLAB, Python, Excel
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3mo
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Junior Database Administrator
Falls Church or Washington D.C.
OnsiteFull Time
ECS
ECSNYSE: ASGN: Provides advanced technology and engineering services to government agencies.
0+ YOEBachelor’s degree; 0-3+ years DoD/database experience; Oracle/SQL Server knowledge; data analytics skills.
Python, R, SQL, Oracle Database, SEMOSS, AI analytics
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1mo
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Junior AI/ML Engineer
Arlington, Virginia, United States
OnsiteFull Time
ManTech
ManTech: Provides technology solutions for defense and intelligence agencies.
3+ YOEBachelor's degree in Computer Science or related field; 2+ years experience; 3+ years software engineering; Python proficiency; experience operationalizing ML; familiarity with MLOps tools; cloud platforms; CI/CD practices.
AWS SageMaker, MLflow, Kubeflow, Airflow, TensorFlow Serving, TorchServe, ONNX runtime, Terraform, Helm, Kubernetes, Databricks, SHAP, LIME
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3mo
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Junior Full Stack Software Engineer (DevSecOps)
Herndon, Virginia, United States
$80k-$128k/yr OnsiteFull Time
Peraton
Peraton: Provides advanced technology and mission support for government agencies.
2+ YOEBachelor's with 2+ years or Master's in a relevant field; TS/SCI with polygraph; proficient in Java, Python, JavaScript; REST/JSON, Git, Agile, Docker; AWS experience; unit testing.
Java, Python, JavaScript, TypeScript, REST, Git, Docker, AWS, JUnit, Pytest
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3w
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Junior Developer
Rosslyn, Virginia, United States
$139k/yr OnsiteFull Time
ActioNet
ActioNet: Provides IT modernization and cybersecurity services for government agencies.
0+ YOEBachelor's in CS/IT, 0–3 years software development experience, knowledge of Python/Java/C#, familiarity with Agile/Scrum/SAFe, Secret clearance, strong communication and problem-solving; cloud and DevOps certifications preferred.
Python, Java, C#, Agile, Scrum, SAFe, GitHub, Docker, AWS, Microsoft Azure
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2mo
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Data Engineer - Junior
Quantico, Virginia, United States
$94k-$157k/yr OnsiteFull Time
American Systems
American Systems: Providing strategic engineering and IT solutions for government programs.
0+ YOE0–3 years in data engineering; SQL and Python; bachelor’s in CS/IS/Engineering/Data Science; active TS/SCI clearance.
SQL, Python, Relational Databases
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3d
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Junior Software Engineer
Warrenton or McLean or Fort Eisenhower
$100k-$150k/yr OnsiteFull Time
Altamira Technologies
Altamira TechnologiesNYSE: PSN: Provides data analytics and engineering for national security missions.
Bachelor's in CS or related, familiarity with Java/Python/JavaScript and modern web stacks, TS/SCI clearance required, strong communication and problem-solving skills.
Java, Python, JavaScript, Typescript, Angular, React, ElasticSearch, ELK stack, Redis, Web Services (REST), docker, lxc, Kubernetes, helm, Machine Learning, Data Analytics, Android, NoSQL, SQL, Xmidas, Digital Signal Processing
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2d
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Data Engineer Junior
Fairfax, Virginia, United States
$80k-$92k/yr RemoteFull Time
ASM ResearchNYSE: ACN: Provides IT and healthcare services to government agencies.
1+ YOEBachelor's or equivalent,1+ years data engineering experience,Python and SQL proficiency,experience with Spark and ETL,ability to obtain SECRET clearance,U.S. citizenship required.
Python, SQL, Spark, Apache Airflow, Hadoop, AWS, Azure, Google Cloud
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3w
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Analytic Developer-Junior
Annapolis Junction, Maryland, United States
OnsiteFull Time
NetSage
NetSage: Delivering specialized cyber services to the U.S. federal government.
2+ YOETS/SCI with polygraph required; BS in Computer Science (or equivalent) + 2 years experience; experience with Java, Python, PySpark, ETL, JSON/BSON, Pig/MapReduce/Hadoop.
Java, Python, PySpark, JSON, BSON, Pig, MapReduce, Hadoop
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1w
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Junior Systems Integrator
Denver or Springfield or Sterling or St. Louis
$58k-$116k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
0+ YOEBachelor's in CS/Engineering or equivalent,0–3 years technical experience,foundational Linux/networking/system admin knowledge,Python/Bash familiarity,TS/SCI clearance and polygraph.
Linux, Python, Bash
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