2,023 senior software engineer python jobs at 461 companies in Manassas, 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
PromotedHiringCafe
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
3d
Save
Mark Applied
Hide
Senior Python Software Engineer (Partial Telework)
Annapolis Junction, Maryland, United States
$180k-$260k/yr HybridFull Time
GliaCell Technologies
GliaCell Technologies: Software and systems engineering for the intelligence community.
14+ YOEActive or reinstatable TS/SCI with Polygraph, U.S. citizenship, 14+ years software engineering experience, BS in Computer Science (or 4 additional years experience), Python, cloud and containerization experience.
Python, Terraform, Kubernetes (K8s), AWS Elastic Container Service, AWS, GitLab CI/CD
1mo
Save
Mark Applied
Hide
Lead Python Programming Software Engineer – Level 4
Fairfax, Virginia, United States
$142k-$213k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
8+ YOEActive TS/SCI clearance and U.S. citizenship; Bachelor's +8 years (or Master’s +6 or PhD +4) software development experience; 3+ years senior-level Python; software architecture and version control (GitLab) experience.
Python, GitLab
2mo
Save
Mark Applied
Hide
Senior Software Engineer
Arlington or San Diego or Woburn
$139k-$180k/yr HybridFull Time
Systems & Technology Research
Systems & Technology Research: Develops advanced technology for national security and defense applications.
5+ YOESenior software engineer with strong C++, Python/MATLAB, RT real-time systems, security clearance eligibility.
C++, Python, MATLAB, CI/CD, Windows, Linux
1mo
Save
Mark Applied
Hide
Lead Python Programming Software Engineer – Level 4
Fairfax, Virginia, United States
$142k-$213k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Designs and manufactures advanced aerospace and defense systems.
8+ YOEActive TS/SCI clearance and U.S. citizenship required; 8+ years software development with Bachelor's (alternatively Master's/PhD with fewer years); 3+ years senior Python experience; software architecture, GitLab/version control, and team leadership experience.
Python, GitLab
1mo
Save
Mark Applied
Hide
Software Engineer, Senior
Fort Meade, Maryland, United States
$87k-$198k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Consulting and technology services for government and commercial clients
14+ YOESenior full-stack developer with experience in C++, JavaScript, and Python; TS/SCI clearance with polygraph; 14+ years of software engineering experience or 18+ years in lieu of degree.
C++, JavaScript, Python
1mo
Save
Mark Applied
Hide
Software Engineer (Python)
Washington, District of Columbia, United States
$122k-$167k/yr OnsiteFull Time
Truist
TruistNYSE: TFC: Offers personal banking, business lending, and investment management services.
5+ YOEBachelor's in CS/Software Engineering or equivalent with 5+ years experience; proficiency in Python, GitLab CI/CD, AWS (IAM, ECS/EKS, EC2, S3, CloudTrail, CloudWatch, CloudFront, VPC), Terraform, CloudFormation; container development; strong communication.
Python, GitLab CI/CD, AWS, IAM, ECS, EKS, EC2, S3, CloudTrail, CloudWatch, CloudFront, VPC, Terraform, CloudFormation, Wiz, Azure, AWS Bedrock, Streamlit, Claude Sonnet, Vector Databases
1mo
Save
Mark Applied
Hide
Senior Python Developer
Washington or Virginia or Maryland
$90k-$130k/yr OnsiteFull Time
Tripoint Solutions
Tripoint Solutions: Providing technology modernization and data services to federal agencies.
5+ YOEBachelor's in CS or related, 5+ years Python development, experience with Django/Flask, REST APIs, PostgreSQL, Git, Unix/Linux, AWS/Cloud platforms, Jupyter Notebooks; U.S. citizenship and eligibility for Federal Public Trust required.
Python, Django, Flask, Jupyter Notebook, Git, PostgreSQL, Unix/Linux, HTML, JavaScript, Docker, Kubernetes, AWS, Cloud Foundry, Heroku, ServiceNow, UiPath
1mo
Save
Mark Applied
Hide
Senior Python Developer
Herndon, Virginia, United States
OnsiteFull Time
ManTech
ManTech: Provides technology solutions for defense and intelligence agencies.
10+ YOE10+ years Python development, SQL, front-end/full stack, Git, Docker/Kubernetes, RESTful API development, Linux/Unix; Bachelor's in CS +10 years or HS +14 years; active TS/SCI with polygraph required.
Python, SQL, Git, Docker, Kubernetes, RESTful API, Linux/Unix, Node.js, Jenkins, GitLab CI, AWS, Azure, JIRA
3mo
Save
Mark Applied
Hide
Senior‑Level Python Developer (Python, C++)
Annapolis Junction, Maryland, United States
$155k-$175k/yr OnsiteFull Time
IDS International
IDS International: Global training, logistics, and security for government agencies.
8+ YOEBachelor’s degree in computer science; 8+ years relevant experience; Python, C++, Spark; Jupyter Notebooks; JIRA, Confluence, Git/GitLab; knowledge of customer tools; active TS/SCI with Polygraph.
Python, C++, Spark, Jupyter Notebooks, JIRA, Confluence, Git/GitLab
3mo
Save
Mark Applied
Hide
Senior Software Engineer
Herndon, Virginia, United States
OnsiteFull Time
Expedition Technology
Expedition Technology: Delivering advanced machine learning and signal processing for defense.
8+ YOE8+ years software engineering; Python expert; TS/SCI with CI poly; Bachelor's in CS/EE or equivalent; cloud; DevSecOps; Linux; AI/ML interest.
Python, Docker, Kubernetes, Linux, Cloud, CI/CD workflow
2mo
Save
Mark Applied
Hide
Senior Software Engineer
Washington or Boston
$129k-$194k/yr OnsiteFull Time
Recorded Future
Recorded Future: Provides AI-driven threat intelligence to protect organizations from cyberattacks.
Strong Python, distributed systems, cloud platforms, AI/ML, LLMs, autonomous agents, senior IC.
Python, AWS, GCP, Azure, Jira, Git, LLMs, AI agent tooling
1w
Save
Mark Applied
Hide
Senior Lead Software Engineer (Golang, Python, AWS)
McLean or Richmond
$209k-$262k/yr OnsiteFull Time
Capital One
Capital OneNYSE: COF: Financial services offering credit cards, banking, and loans.
6+ YOE4+ MgmtBachelor's degree,6+ years software engineering,1+ year cloud experience,4+ years people management,experience with Go/Python/JavaScript/Java/TypeScript/SQL,Docker,Kubernetes,AWS/GCP/Azure.
Golang, Python, Go, JavaScript, Java, HTML/CSS, TypeScript, SQL, Docker, Kubernetes, AWS, GCP, Microsoft Azure
3mo
Save
Mark Applied
Hide
Senior Software Engineer, Growth
Boston, Massachusetts, United States
$148k-$222k/yr OnsiteFull Time
Klaviyo
KlaviyoNYSE: KVYO: Software platform for automated e-commerce marketing and customer data.
Senior software engineer with full-stack experience, focus on onboarding and user experience, data-driven, AI-aware, leadership and mentoring responsibilities.
HTML, TypeScript, JavaScript, React, Python, Django, MySQL, Cassandra, RabbitMQ, Redis, AWS, Terraform, Ansible, Packer
3mo
Save
Mark Applied
Hide
Software Engineer - Python
Annapolis Junction, Maryland, United States
OnsiteFull Time
Interclypse
Interclypse: Provides software engineering and cybersecurity solutions for government agencies.
Develop Python/FastAPI middleware; build pipelines; implement REST API; ensure testing; participate in Agile sprints; documentation.
Python, FastAPI, REST API, Git, Agile, DevSecOps, Axway, Windows NAS, SQL, UAT
2mo
Save
Mark Applied
Hide
Sr. Python Engineer, Agentic AI
Washington, District of Columbia, United States
$168k-$252k/yr HybridFull Time
Comcast
ComcastNASDAQ: CMCSA: Provides global telecommunications, media content, and entertainment services.
7+ YOESenior backend engineer with Python experience, AI/agentic workflows, scalable systems, observability, and mentorship.
Python, FastAPI, Asyncio, LLMs, APIs, Microservices, Distributed Systems
1w
Save
Mark Applied
Hide
Senior Python Developer with Spark
Reston, Virginia, United States
$97k-$157k/yr HybridFull Time
CGI
CGINYSE: GIB: Provides information technology and business consulting services.
8+ YOE8+ years Python data engineering with Apache Spark, advanced SQL, AWS (EMR, Redshift, S3, Glue), big data tooling, CI/CD (GitLab, Terraform), and strong performance optimization skills.
Python, Apache Spark, Hadoop, Hive, EMR, SQL, AWS, Redshift, S3, Glue, Lambda, Step Functions, EventBridge, GitLab, Terraform
2w
Save
Mark Applied
Hide
Python/Django Developer
McLean, Virginia, United States
$80k-$120k/yr OnsiteFull Time
Tata Consultancy Services
Tata Consultancy ServicesNational Stock Exchange of India: TCS: Global provider of IT services, consulting, and business solutions.
10+ YOEMust be US-citizen/eligible for US security clearance; 10+ years software engineering with 5+ years Python; experience with Django and Nginx; AWS Gov cloud, FedRAMP/IL5 exposure advantageous.
Python, Django, Nginx, AWS Gov cloud, AWS
1mo
Save
Mark Applied
Hide
Senior Software Engineer
Quantico, Virginia, United States
OnsiteFull Time
Redhorse
Redhorse: Delivering data insights and technology solutions to government agencies.
6+ YOEActive TS/SCI clearance; BS in CS/CE/SE/EE/Info Security; 6+ years software/ops; 4+ years in CNO; 2+ years automation (Python/Bash/PowerShell/Ansible); Linux admin; Git/Jira/GitLab; Docker/Podman; leadership; able to work independently.
Python, Bash, PowerShell, Ansible, Linux (Ubuntu, Rocky Linux), Git, Jira, GitLab, Docker, Podman, Docker Compose
1mo
Save
Mark Applied
Hide
Senior Software Engineer
Washington or United States
$160k-$190k/yr RemoteFull Time
Modern Classrooms Project
Modern Classrooms Project: Provides training for blended and self-paced instructional models.
AI-native senior engineer with hands-on experience building backend systems and generative AI/agentic orchestration using Python and TypeScript, prompt engineering, Spec-Driven Development, and durable production workflows.
Claude Code, OpenAI Codex, LangGraph, Python, TypeScript, GitHub Spec Kit
1mo
Save
Mark Applied
Hide
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.
7+ YOEBachelor's in Computer Science (or 4 yrs SWE experience) and 7 years SWE experience required; strong Python skills; NiFi or Elastic a plus; TS/SCI with polygraph required.
Python, NiFi, Elastic