54 python backend engineer jobs at 23 companies in Winchester, VA

PromotedHiringCafe
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
3mo
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Backend Developer, Data Platform
Reston, Virginia, United States
$113k-$188k/yr HybridFull Time
Vantor
Vantor: Providing AI-powered spatial intelligence and high-resolution Earth observation.
5+ YOE5+ years backend software engineering; strong Python; PostgreSQL; Elasticsearch; AWS (S3, RDS); TS/SCI clearance with CI polygraph; Bachelor's in CS/Systems Eng or equivalent; strong debugging and CI/CD skills.
Python, PostgreSQL, Elasticsearch, AWS, S3, RDS, Docker, OpenShift, Helm, Gitlab CI, CI/CD
1mo
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Senior Backend Developer, Data Platform
Reston, Virginia, United States
$137k-$200k/yr HybridFull Time
Maxar Intelligence
Maxar Intelligence: Providing satellite imagery and geospatial intelligence for global security.
10+ YOEU.S. citizenship and active TS/SCI with CI polygraph required. 10+ years backend engineering experience, strong Python, PostgreSQL, Elasticsearch, AWS (S3, RDS), CI/CD, distributed systems, and bachelor's degree in CS or related field.
Python, PostgreSQL, Elasticsearch, AWS, S3, RDS, GitLab, GitLab CI, OpenShift, Helm, Docker, CI/CD
2mo
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Back End Software Engineer
Chantilly, Virginia, United States
$87k-$198k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
5+ YOE5+ years in software development (Python), AWS serverless, REST/microservices, SQL/NoSQL, TS/SCI with polygraph, HS diploma or GED.
AWS, Lambda, Docker, Kubernetes, FastAPI, React, Terraform, Terragrunt, Agile, REST APIs, SQL, NoSQL, Python
2mo
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Back End Software Engineer
Chantilly, Virginia, United States
$87k-$198k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
5+ YOE5+ years software development with Python; AWS serverless; REST/microservices; SQL/NoSQL; TS/SCI with poly; HS diploma or GED; Agile experience; Docker/Kubernetes; FastAPI; Terraform/Terragrunt; React optional.
Python, AWS, Docker, Kubernetes, FastAPI, Terraform, Terragrunt, REST, SQL, NoSQL, React
1w
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SharePoint Engineer (Back End) - TS/SCI w/Polygraph
Annapolis Junction or Sterling
$147k-$199k/yr OnsiteFull Time
GDIT
GDITNYSE: GD: Delivers IT and mission services to government agencies.
8+ YOEActive TS/SCI with polygraph, DoD 8570 IAT Level II cert, 8+ years related experience, SharePoint on-prem and Online experience, PowerApps/Power Automate, back-end programming experience, systems engineering skills.
SharePoint, SharePoint Online, PowerApps, Power Automate, PowerShell, Python, JavaScript, Java, Perl, Ruby, C++
1w
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SharePoint Engineer (Back End) - TS/SCI w/Polygraph
Annapolis Junction or Sterling
$147k-$199k/yr OnsiteFull Time
General Dynamics Information TechnologyNYSE: GD: Provides mission-critical IT services to government and defense organizations.
8+ YOEActive TS/SCI with polygraph, DoD 8570 IAT Level II cert, Bachelor’s +8 years (or equivalent), SharePoint Online/on-prem, PowerApps/Power Automate, PowerShell, back-end programming experience.
SharePoint, PowerApps, Power Automate, PowerShell, Python, JavaScript, Java, Perl, Ruby, C++, Microsoft Azure, Microsoft 365
2w
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AI/ML Engineer (Systems Engineer, Sr)
Chantilly, Virginia, United States
OnsiteFull Time
Redwire
RedwireNYSE: RDW: Manufactures infrastructure and hardware components for diverse space missions.
1+ YOEU.S. citizen eligible for DoD Secret clearance, 1+ years backend/systems engineering experience, proficiency in Python/C++/Rust, experience with agentic systems, graph data modeling, real‑time pipelines, API design, and secure operations.
Python, C++, Rust, Neo4j, DGraph, ArangoDB, CUDA, REST, GraphQL, gRPC, SOAP, UDP, TCP, Pub/Sub, CI/CD
3w
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Database Engineer – GSE (Ground Support Engineer)
Sterling, Virginia, United States
$61k-$114k/yr OnsiteFull Time
Trident Systems
Trident Systems: Develops high-performance electronics for space and defense.
0+ YOEBachelor's in a technical discipline or equivalent, 0-2 years database engineering experience, strong relational DB experience (PostgreSQL, MySQL, SQL Server), schema design, performance tuning, and backend integration skills.
PostgreSQL, MySQL, SQL Server, Python, C#, Java, JavaScript, PowerShell, ERP, PLM, MES
2mo
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Full Stack Web Developer
Denver or Sarasota or Sterling
$82k-$172k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
5+ YOEB.S. in CS or related, active TS/SCI clearance, 5+ years web development, strong React.js and TypeScript skills, backend experience with Flask/Express.js, Python, PostgreSQL, and Git.
React.js, Flask, Express.js, Python, HTML5, CSS3, TypeScript, JavaScript, PostgreSQL, Git, GitLab CI/CD, Docker, WebSockets, Tailwind CSS, SQLAlchemy, Prisma, Drizzle, Tanstack Tools, Redis, AWS, Azure, GCP
3mo
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Software/Machine Learning Engineer
Herndon, Virginia, United States
OnsiteFull Time
Expedition Technology
Expedition Technology: Delivering advanced machine learning and signal processing for defense.
3+ YOEBackend software engineer with Python, Docker, Kubernetes, AWS; experience with ML pipelines; US citizenship with ability to obtain TS/SCI clearance.
Python, Docker, Kubernetes, AWS, Git, Linux
6d
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Software Engineer Level 5
Reston, Virginia, United States
OnsiteFull Time
Base-2 Solutions
Base-2 Solutions: Delivers engineering and technology services for national security.
Active TS/SCI with CI Polygraph, backend development, data engineering, API development, Python, FastAPI, PostgreSQL, Elasticsearch, and high-performance integrations.
Python, FastAPI, PostgreSQL, Elasticsearch, SQL
5d
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Sr. Software Engineer 7947
Reston, Virginia, United States
HybridFull Time
Comcast
ComcastNASDAQ: CMCSA: Provides global telecommunications, media content, and entertainment services.
5+ YOEBachelor's in CS/Engineering and 5+ years building backend services with Golang/Python, Kubernetes/Docker, AWS; 3+ years front-end experience; 1+ year Prometheus/Grafana monitoring.
JavaScript, TypeScript, HTML5, CSS, React, Angular, Vue.js, Redux, Vuex, Webpack, Babel, Golang, Python, Gin, Go modules, pip, Go testing, Pytest, Kubernetes, Docker, AWS, Azure, GCP, EC2, S3, RDS, Lambda, IAM, VPC, Jenkins, Github, ArgoCD, Ansible, Terraform, Prometheus, Grafana
5d
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Software Engineer SME
Herndon, Virginia, United States
$50k-$290k/yr OnsiteFull Time
The Swift Group: Providing engineering and cybersecurity services for national security missions.
10+ YOE10+ years building and operating backend services, APIs, and microservices; BS in Computer Science; US citizenship and active TS/SCI with Polygraph; proficiency with Java, Ansible/Python, Postgres/MySQL/MariaDB, Linux, AWS, containers, and Git workflows.
Java, Ansible, Python, Postgres, MySQL, MariaDB, Linux, AWS, Hadoop, Spark, Yarn, Hive, Trino, GitLab, GitHub, Git, SQL
1mo
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Senior Software Engineer (Remote Sensing)
Reston or Arlington or Santa Barbara or Goleta
$155k-$185k/yr OnsiteFull Time
Umbra
Umbra: Operates high-resolution synthetic aperture radar imaging satellites.
5+ YOEBS in CS or related, 5+ years backend experience (Python preferred), 3+ years building RESTful APIs, CI/CD and containerization experience, PostgreSQL and AWS familiarity, strong communication and security knowledge.
Python, RESTful APIs, PostgreSQL, Kubernetes, Docker, AWS, CI/CD, Swagger/OpenAPI
1mo
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Software Engineer Lead
Herndon or Columbia
OnsiteFull Time
Freedom Technology Solutions Group
Freedom Technology Solutions Group: Provides geospatial and software engineering solutions for national security agencies.
4-6 years backend and frontend development; 6-8 years AWS/Linux; 2-3 years AI/ML; strong Python/Java; Agile; SQL/NoSQL; cloud and microservices; security clearance with polygraph; Docker/containers.
Python, Java, Angular, AWS, Linux, Docker, Kubernetes, ElasticSearch, Solr/Lucene, OpenSearch, SQL, NoSQL, Jira, Confluence, GitHub, ETL, PyTorch, Keras, TensorFlow, Tableau, Pandas, D3.js, Gensim, spaCy, NLTK, Stanford CoreNLP, OCR, BERT, NER
3mo
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Database Engineer - Analytics Platforms
Herndon or Annapolis Junction or Bowie
$86k-$138k/yr OnsiteFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
5+ YOEBS with 5+ years, MS with 3+ years, or PhD; strong Python and SQL; data pipelines and backend services; experience with Agentic AI; multiple data sources; cloud, containers, and deployment tooling; US Citizenship with FAA Public Trust suitability.
Python, SQL, Docker, Kubernetes, Terraform, PostgreSQL, MySQL, Snowflake, BigQuery, Redshift
2mo
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Software Engineer Sr. Consultant , Fullstack/GenAI Engineering
Ashburn, Virginia, United States
$152k-$244k/yr HybridFull Time
Visa
VisaNYSE: V: Global payment technology facilitating electronic funds transfers.
8+ YOE2+ Mgmt8+ years software engineering; 2+ years leading engineers; strong GenAI, backend/frontend, AWS, and distributed systems experience.
Python, FastAPI, Flask, Node.js, React, TypeScript, AWS Bedrock, SageMaker, LangGraph, LangChain, Haystack, RAG, Jenkins, GitHub Actions, Terraform, CloudFormation, CodePipeline, Pinecone, FAISS, OpenSearch, Weaviate, Kafka, Kinesis, Databricks, MLFlow
1mo
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Software Engineer (Expert) (22694)
Herndon, Virginia, United States
OnsiteFull Time
RenXTech
RenXTech: Technical and analytical support for national security missions.
6+ YOEU.S. citizenship and active TS/SCI with Polygraph required. 6+ years in backend/frontend/cloud/Linux, proficiency in Python and Java, AI/ML experience (2–3 yrs), SQL/NoSQL, search tools, containerization, and Agile tooling (Jira/Confluence/GitHub).
Python, Java, Angular, Amazon Web Services (AWS), Commercial Cloud Services (C2S), Linux, vi, emacs, shell scripting, SQL, NOSQL, ElasticSearch, Solr/Lucene, OpenSearch, Docker, Podman, Jira, Confluence, GitHub, ETL, AI/ML
2mo
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Full Stack Developer
Herndon or Chantilly
$190k-$250k/yr OnsiteFull Time
Insight Xcite
Insight Xcite: A mission-focused consulting firm that supports critical government programs through engineering, technology, cybersecurity, and analytics.
6+ YOEActive TS/SCI with Full-Scope Polygraph, 6+ years software development, frontend (React/Angular/JS/TS/HTML/CSS) and backend (Java/Python/Node.js) experience, API development, Git, and Agile.
React, Angular, JavaScript, TypeScript, HTML, CSS, Java, Python, Node.js, Git, AWS, Azure, Docker, Kubernetes, CI/CD, DevOps
3w
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Software Engineer
Herndon or McLean or Chantilly
OnsiteFull Time
M1 Technology
M1 Technology: Developing mission-critical technology for the U.S. intelligence community.
Proficiency with modern front-end JavaScript frameworks or backend languages, microservices architecture, AWS cloud development, SQL and NoSQL databases, and RESTful API development.
React, Angular, Vue.js, Java, Python, NestJS, NodeJS, TypeScript, React Query, AWS, Lambda, DynamoDB, S3, API Gateway, PostgreSQL, MySQL, MongoDB, RESTful APIs, Camunda, Flowable, n8n.io, JIRA, Confluence, CI/CD