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Senior Python Developer Jobs in Leesburg, VA, US
2,200+ senior python developer jobs from 510+ companies hiring in Leesburg, VA, US.
3w
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Software Engineer 3 - I
Annapolis Junction, Maryland, United States
OnsiteFull Time
12+ YOETwelve years SWE experience; Bachelor's degree in CS or related field; extensive software design, development, and leadership responsibilities.
Javascript, Typescript, React, node.js, Rust, Python, shell, Kubernetes, Helm Charts, Service-mesh, Multi-site applications, Load Balancing, Cloud Migration, nifi, JEST, Grafana, InfluxDb, Elasticsearch, Redis, mysql, Apache Superset, RabbitMQ, Kafka, Ansible, Salt, Terraform, Web-Sockets, JBLOCKS, CASPORT, Neo4j, CAMKEY, LAC, COI
2mo
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Sr. Web Application Developer #1703183
Chantilly, Virginia, United States
$121k-$135k/yr OnsiteFull Time
8+ YOEDesign, develop, test web apps; US citizenship; active TS clearance with SCI access and CI polygraph; onsite Chantilly, VA; 8+ years web development; BS in CS/Software Engineering; SAFe and agile experience; 508 compliance; modern frontend and backend tech; cloud and DevSecOps.
Angular, React, .NET C#, Python, Node.js, JavaScript, TypeScript, HTML5, CSS3, Bootstrap, MySQL, PostgreSQL, Microsoft SQL, Elasticsearch, RabbitMQ, Redis, Docker, Kubernetes, AWS GovCloud, SC2S, C2S, DevSecOps
3w
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Remarkable Data Engineer (2+ years - Senior Level)
Arlington, Virginia, United States
OnsiteFull Time
3+ YOE3+ years data engineering experience with Python, Databricks, ETL design, and at least one relational database; Agile SCRUM experience.
Python, Databricks, ETL, Relational databases, SQL, NoSQL, Qlik
1w
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Backend Software Engineer
Gaithersburg or Alexandria or Chantilly or St. Louis or Tucson
OnsiteFull Time
8+ YOEUS citizen; TS/SCI with poly; BS in CS/SE with 8–12 yrs (MS with 6–10); Java or Python; REST APIs; SQL; Linux; ability to work independently.
Java, Python, REST, SQL, Linux, Apache Airflow, Spring Boot, Django, GitLab, Jenkins, Docker, OpenShift, AWS, Azure, Agile
2mo
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Senior Cloud and Kubernetes Engineer
Fort Meade, Maryland, United States
OnsiteFull Time
Senior cloud and Kubernetes engineer with DoD environment, SECRET clearance, onsite at Fort Meade, experience with Kubernetes, Linux (RHEL), Terraform, Ansible, Jenkins, GitLab, Nexus, CI/CD, and security frameworks.
Kubernetes, Terraform, Ansible, Jenkins, GitLab, Nexus, Linux, RHEL, Bash, Python
2mo
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Lead Software Engineer (Back-End)
Germantown, Maryland, United States
$120k-$170k/yr HybridFull Time
5+ YOE5+ years in software development (C#, .NET); lead development projects; 1+ year cloud (Azure/AWS/Snowflake); strong code reviews and mentoring.
C#, .NET, SQL, JavaScript, Azure, AWS, Snowflake, Python
4w
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Principal Engineer - Agentic AI Applications
Washington, District of Columbia, United States
$168k-$230k/yr HybridFull Time
12+ YOE12+ years software engineering; 4+ years in technical leadership; production experience with LLM-powered or agentic systems; Python backend expertise; strong observability, architecture, and testing skills
Python, LangGraph, AutoGen, CrewAI, TypeScript, Node.js, RAG pipelines, vector databases, tool-calling APIs, multi-step reasoning
1w
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Software Engineer/Data Manager
Alexandria or Quantico
OnsiteFull Time
8+ YOESenior Software Engineer with data management expertise; 8+ years experience; TS/SCI with poly is required.
Python, Java, C++, SharePoint, PowerPoint, Visual Studio
2w
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Full-Stack Engineer
Arlington, Virginia, United States
HybridFull Time
Zetier: Independent software developer focused on secure systems.
5+ YOE5+ years building production full-stack apps; proficient with React/Angular/Vue; strong TS/JS and UI; Python backend; REST; databases; message brokers; distributed teams; active U.S. security clearance.
React, Angular, Vue, TypeScript, JavaScript, Python, Flask, FastAPI, Bootstrap, Material, PostgreSQL, ORM, REST, RabbitMQ, AMQP, Docker, Kubernetes, Figma, uBoot, firmware, IOT, Binary Ninja, IDA Pro
3w
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Ground Station Software Engineer (Staff to Senior Staff)
Chantilly or United States
$148k-$215k/yr RemoteFull Time
10+ YOEBachelor's in CS/Software Eng; 10–15 yrs software engineering; leadership; avionics/GCS experience; aerospace domain; proficiency in modern UI and web/real-time systems.
TypeScript, C++, Python, C#, React, Node.js, Electron, Docker, Kubernetes, MAVLink, STANAG 4586, WebSocket, REST, Mapbox, MapLibre GL, Qt, WPF
2w
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Forward Deployed Engineer
Reston, Virginia, United States
HybridFull Time
5+ YOEBachelor’s degree in CS/Engineering or equivalent; 5+ years in software engineering, cloud architecture, and deployments; strong cloud experience (GCP/AWS/Azure); full-stack proficiency (Python, TypeScript, Go, Rust, or Java); Docker/Kubernetes; US Citizen.
Kubernetes, GKE, Docker, Python, TypeScript, Go, Rust, Java, Google Cloud, AWS, Azure
2mo
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Staff Software Engineer - Federal
Washington, District of Columbia, United States
$161k-$221k/yr RemoteFull Time
8+ YOE8+ years of coding and scripting experience; Python required; Terraform and cloud tooling; experience with ETL/ELT, security data ingestion, and regulated environments; TS/SCI clearance is a plus.
Python, Terraform, CI/CD, AWS, GCP, Azure, PowerShell, Bash, Go
2w
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Staff Software Developer (TS/SCI)
Herndon, Virginia, United States
$92k-$195k/yr OnsiteFull Time
5+ YOEUS citizen with TS/SCI clearance and CI poly; BS in CS/Software Eng; 5+ years backend software dev; Java/Python/JS; REST APIs with Spring Boot; Docker/Kubernetes/OpenShift; Jenkins/Git/Helm; Linux scripting; on-site in Herndon, VA.
Java, Python, JavaScript, Spring Boot, Docker, Kubernetes, OpenShift, Rancher, Jenkins, Git, Bitbucket, Gradle, Bash, Shell, OpenSearch, Elasticsearch, Keycloak, Fluent Bit, Cesium, PostgreSQL
1w
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Lead Software Engineer
Springfield, Virginia, United States
HybridFull Time
6+ YOETS/SCI clearance; Bachelor's with 6+ years or 15+ years experience in lieu of degree; 6+ years Python, DevSecOps/CI-CD, IaC (Terraform), containers; AWS (EC2, DynamoDB, ECS, SQS/SNS, IAM, Lambda, CDK); leadership; strong communication.
Python, GitLab, Terraform, Docker, Kubernetes, OpenShift, AWS CDK, EC2, DynamoDB, SQS/SNS, Lambda
2w
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Cleared Senior Windows CNO Developer & Analyst
Annapolis Junction, Maryland, United States
OnsiteFull Time
12+ YOETS/SCI with Full Scope Poly; 12+ years in software security, reverse engineering, and CNO; C++/Python; assembly; debugging tools; Windows internals; networking; Scrum/Kanban; version control.
C++, Python, WinDbg, Assembly, Windows Internals, Networking Protocols, Sockets, Version control systems
1mo
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Senior Ontologist
Springfield, Virginia, United States
OnsiteFull Time
15+ YOEActive TS-SCI; 15+ years experience with PhD or 20+ years with BA/BS; proven ontology development, semantic tech, data modeling; DoD/IC experience preferred.
RDF, OWL, SPARQL, Python, Basic Formal Ontology (BFO), Common Core Ontologies (CCO)
1d
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Lead DevOps Engineer
McLean, Virginia, United States
RemoteFull Time
5+ YOEFive (5) years in technology, four (4) years with CI tools (GitLab preferred), four (4) years automating delivery, three (3) years administering Kubernetes, three (3) years on AWS, scripting in Bash/Python/Terraform, on-call reliability. Travel up to 10%.
GitLab, Bash, Python, Terraform, Kubernetes, Docker, AWS
1w
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Sr. Data Engineer
Boston or New York or Santa Monica or Washington DC or Silicon Valley or Los Angeles or San Francisco or Philadelphia
$150k-$160k/yr OnsiteFull Time
5+ YOEFive+ years in senior data engineering or database architecture; cloud platforms; SQL; Python; ETL/ELT; data integration; Agile; AI familiarity.
Snowflake, Microsoft Fabric, SQL, Python, Git, APIs, JSON, XML, ETL/ELT
1mo
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DevOps Engineer, GovCloud Mid/Senior
Herndon or Denver or Bellevue or San Francisco
$149k-$260k/yr HybridFull Time
4+ YOE3+ years containers/Kubernetes; 4+ years AWS/Linux; 2+ years security for sensitive data; 3+ years CI/CD (Jenkins/Spinnaker); 2+ years scripting; strong networking and logging experience.
Docker, Kubernetes, EKS, GKE, Puppet, Chef, Ansible, Terraform, AWS, Linux, Jenkins, Spinnaker, Shell, Python, Golang, Ruby, TCP/IP, Splunk, ELK, OPA, Checkov, Twistlock, Prisma
1mo
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Azure DevOps Engineer III (Principle) (75661)
Sterling, Virginia, United States
OnsiteFull Time
6+ YOESenior DevOps engineer with deep CI/CD, IaC, and cloud expertise; leadership in pipeline design, governance, and secure delivery.
GitHub Enterprise Actions, Terraform, Ansible, Azure, Kubernetes, AKS, PowerShell, Bash, Python, Git
1mo
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Sr. Forward Deployed Software Engineer
Arlington, Virginia, United States
OnsiteFull Time
8+ YOE8+ years software engineering or systems integration; Palantir Foundry expertise; DoD experience; Python/TypeScript/Java.
Palantir Foundry, Workshop/Slate, Ontology, AIP, CI/CD tooling, Python, TypeScript, Java
3w
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Lead Software Engineer - Gov Cloud
Reston, Virginia, United States
$130k-$195k/yr OnsiteFull Time
Secure, scalable software development; cloud automation; DevOps; Azure-focused; cross-functional communication.
Terraform, Ansible, ARM, Azure DevOps, C#, ASP.NET, Java, JavaScript, Python, Docker, AKS, Azure Functions, PowerShell, Bash, JSON, YAML
1mo
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Software Engineer-Multiple Levels (DT-0/1/2)
Annapolis Junction, Maryland, United States
$170k-$230k/yr OnsiteFull Time
7+ YOEC++, Java, Linux; Python/JavaScript; Git/GitLab; Agile; 7+ years; BS in related field or 11 years experience in lieu.
C++, Java, Linux, Python, JavaScript, Git, GitLab, VSCode, Eclipse, Jira, Confluence
3w
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Software Engineer III - Back End (Remote)
McLean, Virginia, United States
$120k-$132k/yr RemoteFull Time
5+ YOE5+ years engineering experience; backend web development; RESTful APIs; open source stack; Git; SQL/NoSQL databases; Agile; TDD.
Ruby, Python, Django, Rails, REST, Git, GitHub, Elasticsearch, Solr, SQL, NoSQL
3w
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Agentic AI Engineer
United States or Alexandria
RemoteFull Time
5+ YOEExperience designing and deploying autonomous AI agents; strong Python skills; ML/AI with agent frameworks; cloud and MLOps; security awareness.
Python, FastAPI, asyncio, PyTorch, OpenAI Agents SDK, Autogen, LangGraph, Google ADK/A2A, retrieval-augmented generation, Knowledge graphs, LLMs, Cloud platforms, MLOps
1mo
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Staff Software Engineer - AI Focus
Tysons, Virginia, United States
OnsiteFull Time
8+ YOEBachelor's in CS/CE or related field; 8+ years software development; startup experience; AI-assisted full-stack expertise; strong Python, C#, JavaScript, distributed systems; experience with AI copilots; collaborative, action-oriented; strong IoT/SaaS knowledge.
.NET, SQL Server, Kafka, Ember.js, Node.js, iOS, Android
3w
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Aether Geolocation Engineer
Hawthorne or Washington
$180k-$230k/yr OnsiteFull Time
5+ YOEBS in Electrical Engineering or related field; 5+ years RF signal processing/geolocation experience; Python/MATLAB/C/C++; on-site in Hawthorne, CA or Washington, DC; U.S. citizen; ability to obtain security clearance.
Python, MATLAB, C++, DSP, GPU, FPGA
2w
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Site Reliability Engineer (Senior or Staff), Atlas
New York City or Boston or Charlotte or Miami or New York City or Philadelphia or Raleigh or Washington
$127k-$249k/yr HybridFull Time
5+ YOE5+ years running critical systems at scale; multi-cloud experience; strong Linux; programming in Go/Ruby/Python; knowledge of HTTP/TLS/DNS; on-call rotation.
Linux, Go, Ruby, Python, HTTP, TLS, DNS, AWS, Azure, GCP
2w
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Senior / Staff DevSecOps Engineer
Arlington, Virginia, United States
OnsiteFull Time
8+ YOE8+ years in DevSecOps/security engineering; strong AWS IAM, Terraform IaC, secrets management; CI/CD hardening; container security; compliance (CMMC/NIST); incident response; enablement-focused security.
AWS, Terraform, Ansible, GitHub Actions, Trivy, Grafana, Loki, Tempo, Mimir, PagerDuty, OPA, Checkov, tfsec, AWS Config Rules, Go, TypeScript, Node.js, React, Python, Docker
1d
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Senior IT Associate-Software Technical Lead (Contingent)
Bethesda, Maryland, United States
$114k-$135k/yr HybridContract
10+ YOE10+ years in software development; full-stack exp; TypeScript/Python/React/Vue; APIs with Java/Node.js; Docker/Kubernetes; Agile/DevOps.
TypeScript, Python, React, Vue.js, Java, Node.js, Docker, Kubernetes, Jenkins, GitHub Actions, GitLab CI
1w
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Lead AI/ML Engineer
McLean or Chantilly
$175k-$225k/yr HybridFull Time
8+ YOEAdvanced degree in CS/AI; 8+ years in AI/ML or software; production ML experience; Python and ML frameworks; cloud/Kubernetes; leadership; security clearance: Secret with TS/SCI readiness.
Python, PyTorch, TensorFlow, Scikit-learn, Kubernetes, AWS, CI/CD, Docker
2mo
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Forward Deployed Engineer - Clearance Required
Washington, District of Columbia, United States
$145k-$250k/yr HybridFull Time
Active Secret clearance; Python; PostgreSQL; LLMs/NLP; MEAN stack; TypeScript; Angular; Docker; GitLab; AWS GovCloud; DoD/federal environment; API integration; SDLC and security; strong communication; multitasking; travel.
Python, PostgreSQL, LLMs, NLP, MEAN stack, TypeScript, Angular, Docker, GitLab, AWS GovCloud
6h
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Sr.DSP Engineer (Remote with Travel_
Palm Bay or United States or Wilmington or Tampa or Herndon or Vero Beach
$175k-$200k/yr RemoteFull Time
15+ YOE15+ years DSP experience; Master's or PhD in EE/CE/Applied Maths or related; hands-on RF DSP on Xilinx UltraScale+, RFSoC, Versal; strong CS/CS/math skills; Proficiency in Python/C++/HDL; DoD Secret security clearance or ability to obtain.
Xilinx UltraScale+, RFSoC, Versal, MATLAB, Simulink, Python, C/C++, HDL (VHDL/Verilog), Modelsim
2mo
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Senior AI/ML Modeling, Simulation & Analysis Engineer (Part-Time)
Chantilly or Springfield
OnsitePart Time
Active TS/SCI clearance; MS in Computer Science, AI/ML, Computer Vision, or related STEM; experience in AI model verification, validation, and evaluation; AI Assurance and Explainable AI; proficiency in Python, C++, MATLAB, R, or Java; experience with AI/ML modeling and automation.
Python, C++, MATLAB, R, Java
6d
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DevOps Engineer
White Plains or Conyers or Roanoke or Independence or Hartford or Savannah or Alexandria or Greensboro or Charleston or Missoula or Charlotte or Huntsville or Hartford or Miami or Tallahassee or Albany or Gainesville or Columbus or Boston or San Antonio or Dallas or Denver or Phoenix or San Francisco or Chicago or Nashville or Portland or Charlotte or Houston or Wilmington or Lexington or Tampa or Baltimore or Raleigh or Las Vegas or Cary or Irvine or Brookfield or Shreveport or Greenville or Van Nuys or Minneapolis or Red Bank or Jacksonville or Seattle or Sarasota or Kennesaw or Palm Beach or Towson or Sacramento or Dayton or Broomfield or Golden or Princeton or Omaha or Oklahoma City or Chesterfield or Schaumburg or Suffolk or Jupiter or Carmel or Canonsburg or Buffalo or Schaumburg or Philadelphia or Schaumburg or Sunrise or St. Louis or Los Angeles or Atlanta or Gulfport or Norwalk or South Portland or Metairie or Virginia Beach or Edina or Richmond or Southfield or Cleveland or Milwaukee or Chattanooga or Fort Worth or Rochester or Grand Forks or Detroit or Jersey City or Boise or Portland or San Ramon or Easley or Duluth or Glenville or Syracuse or West Palm Beach or Cary or Irvine or Brookfield or Shreveport or Greenville or Los Angeles or Atlanta or Orland Park or Columbia or Elmhurst or Portland or San Diego or San Ramon or Myrtle Beach or Gainesville or Hartford or Allentown or Macon or Tampa or Saint Petersburg or Irvine or Raleigh or San Ramon or Lewisville
$77k-$134k/yr RemoteFull Time
5+ YOE5+ years software development; cloud (Azure/AWS); CI/CD (Azure DevOps, GitHub Actions); scripting (Python, Bash, PowerShell); Git; strong communication; delivery track record.
Azure, AWS, Terraform, Azure Bicep, Docker, Kubernetes, Git, Azure DevOps, GitHub Actions, Python, Bash, PowerShell
2mo
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Front End Software Engineer
Cambridge or Arlington or Seattle
$90k-$210k/yr HybridFull Time
5+ YOE5+ years frontend UI/UX exp; US citizenship or ability to obtain security clearance; React, Typescript/JavaScript, Python; TDD; design patterns; Git/Subversion; Agile; BS/MS in CS or equivalent; 5+ years experience
React, React Native, Kotlin, Python, Typescript, JavaScript
1w
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Sr. Data Engineer
McLean, Virginia, United States
$137k-$255k/yr RemoteFull Time
7+ YOESenior data engineer with 7+ years experience; SQL and Snowflake; data loading/transformation; security; data modeling; ontology; Python/Java; US security clearance; independent and collaborative; distributed team.
SQL, Snowflake, Python, Java
1mo
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Senior Director, Software Engineering
Philadelphia or Alexandria or Ann Arbor
HybridFull Time
10+ YOE5+ Mgmt10+ years in technology leadership with cross-functional teams; 10+ years software engineering; Bachelor's in CS or related field; Proficient in Java and Python.
Java, Python, XML, HTML, XSLT, XML Schema, XQuery, XPath, PDF, TIFF, Angular, Talend, Pentaho, Databricks, Spark, EMR, Hive, Microservices, SOAP, REST, JavaScript, Node.js, AWS, AMQ, JMS, Spring Boot, PostgreSQL, MySQL, SQL Server, Oracle, ETL, SaaS, NL P, ML, AI
4w
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Staff Software Engineer - Amazon Connect REMOTE
Frisco or Overland Park or Danbury or Franklin or Coral Gables or Tampa or Alpharetta or King of Prussia or Chicago or Boston or Birmingham or New York City or Lake Mary or Charlotte or Houston or Sunrise or Hartford or San Antonio or Alexandria or Independence or Hunt Valley
$116k-$174k/yr RemoteFull Time
8+ YOE8+ years in software development and cloud computing; extensive AWS experience; AWS certification required; Bachelor's degree in CS/IT or related field.
AWS, Amazon Connect, AWS Lambda, API Gateway, DynamoDB, EventBridge, CloudWatch, SQS, KMS, S3, Terraform, Node.js, Python, Java
2mo
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Sr. Infrastructure Engineer 2 - Network
Washington, District of Columbia, United States
OnsiteFull Time
8+ YOESenior system admin with Linux/Windows, scripting (Perl/Shell/Python), network addressing, security, and server co-location experience; 8+ years IT.
Linux, Windows, Active Directory, Tomcat, JBoss, Perl, Shell, Python, IPv4/IPv6, SQL, Java
HiringCafe market data
Senior Python Developer Jobs market signals in Leesburg, VA, US
These signals come from live HiringCafe job inventory, not a static article. Use them to compare the market, then open listings above to apply directly.
Open jobs
2,200+
Hiring companies
510+
Fresh sample
71% new in 30d
Salary visibility
47% show pay
Companies appearing in this market
InterImageLegatoOktaRaftSZNS SolutionsTwentyYellow Duck TechnologiesAd Hoc
Work location mix in visible results
Onsite: 33Hybrid: 24Remote: 11