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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.
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Staff Engineer
Washington, District of Columbia, United States
$140k-$150k/yr HybridFull Time
7+ YOE7+ years of full-stack software development; strong Python/Django and React; cloud (AWS/GCP/Azure); containers (Docker); CI/CD; experience with LLMs and AI tooling; project leadership and strong communication.
Python, Django, React, AWS, GCP, Azure, Docker, CI/CD, Snowflake, dbt, LLM APIs, retrieval-augmented generation
3w
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Staff Software Development Engineer - Person API
Mountain View or McLean
$218k-$260k/yr OnsiteFull Time
8+ YOE8+ years backend API development; experience in Python/Go/Java; REST/GraphQL APIs.
Python, Go, Java, REST, GraphQL, PostgreSQL, NoSQL, Kafka, AWS, GCP, Azure, Kubernetes, OAuth2, OIDC, JWT, APIGateway
2mo
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Staff iOS Engineer
Columbia, Maryland, United States
$165k-$200k/yr HybridFull Time
7+ YOE7+ years iOS development; 3+ years 3D/spatial computing; Swift; ARKit/RealityKit/Metal; REST APIs; C++/Python; able to work with loosely defined requirements.
Swift, ARKit, RealityKit, Metal, GPU, AVFoundation, CoreLocation, CoreMotion, VisionKit, ImageIO, CoreML, RESTful API, C++, Python, CI/CD, Git
1w
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Cybersecurity Engineer – Senior
Washington, District of Columbia, United States
OnsiteContract
8+ YOESenior cybersecurity engineer with 8+ years, US citizenship, IAT/L2 certs, RMF/NIST experience, vulnerability assessment, SIEM/IDS/endpoint tools, cloud familiarity, strong communication.
SIEM, IDS/IPS, endpoint protection, Nessus, Python, PowerShell, Windows, Linux, AWS, Azure
1mo
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Embedded Developer 2 (CFG - 041)
Fort Meade, Maryland, United States
OnsiteFull Time
10+ YOETen years of embedded development experience; C/C++ and Python; experience with Windows/Linux/RTOS; TS/SCI with Polygraph required; degree substitution: 4 additional years of embedded experience for a bachelor’s.
C, C++, Python, Windows, Linux, RTOS, VxWorks, uC/OS
1w
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Senior Infrastructure Engineer
Torrance or Washington
$135k-$183k/yr OnsiteFull Time
5+ YOE5+ years in production infrastructure; Linux, AWS or similar cloud, IaC (Terraform), containers/Kubernetes, CI/CD, observability, secrets management; strong coding; senior on-call experience; US person status
Linux, AWS, Terraform, Kubernetes, CI/CD, observability, Python, Go
2d
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Senior Sailpoint Engineer
Reston, Virginia, United States
$123k-$161k/yr HybridFull Time
4+ YOE4+ years of software engineering with IAM, SailPoint IIQ/ISC, RBAC, SOX/FFIEC, REST/SOAP, Java/Python, and strong SQL in Oracle/PostgreSQL; experience leading large-scale IAM transformations in regulated environments.
SailPoint IdentityIQ, SailPoint Identity Security Cloud, AWS, Java, Python, BeanShell, SQL, Oracle, PostgreSQL, REST, SOAP, Active Directory, Entra ID, LDAP
1w
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Software Developer SME (TS/SCI with Poly Required)
Dulles, Virginia, United States
$164k-$275k/yr OnsiteFull Time
10+ YOEFull stack development with Python/PostgreSQL/AWS; frontend HTML/CSS/JavaScript; UI/UX practices; Git; 10+ years of experience.
Python, PostgreSQL, AWS, SQS, HTML, CSS, JavaScript, Git, Docker, Kubernetes
5d
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Sr. Developer w/Analytics
Crystal City or United States
$100k-$150k/yr HybridFull Time
5+ YOE5+ years software development; analytics experience; U.S. citizenship with DHS 6C Public Trust suitability; Bachelor’s in CS or related field; strong Python/SQL and data tech; ability to work onsite in Crystal City, VA 1–2 days/week.
Python, SQL, PostgreSQL, Oracle, Data Warehouses, Data Lakes, Apache Spark, Databricks, Elasticsearch
1w
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Full Stack Developer
McLean, Virginia, United States
OnsiteFull Time
Expert full-stack developer with Python, PostgreSQL, AWS, frontend skills (CSS/HTML/JavaScript) and UX experience; poly clearance required.
2w
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Senior Instrumentation Engineer
Manassas, Virginia, United States
OnsiteFull Time
8+ YOE8+ years in aerospace instrumentation and data acquisition; bachelor's in aerospace/related engineering; hands-on with DAS hardware; MATLAB/Python proficiency; familiarity with FAA/EASA certification processes; strong avionics/propulsion/structures exposure; U.S. citizenship or permanent residency.
MATLAB, Python, Data Acquisition Systems, Sensor Hardware, Signal Conditioning, Test Software
2mo
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Software Engineer IV
Annapolis Junction, Maryland, United States
OnsiteContract
Senior-level SWE responsible for developing and maintaining complex data flows and software; requires Unix, Java, scripting, NiFi, CM tools, and TS/SCI with Poly.
Linux, Bash, Java, Python, Perl, Jira, Confluence, NiFi, Git, Shell scripting, Eclipse, Docker, Spring, Kafka, OSS, Web Services, JavaScript, C, C++, Python, Ruby
2w
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Senior Systems Engineer (IT Infrastructure)
Tysons, Virginia, United States
OnsiteFull Time
5+ YOEBachelor’s in engineering or computer science, 5+ years of systems engineering; Master’s preferred; DoD 8570 IAT Level II; Top Secret/SCI with polygraph clearance; extensive IT infrastructure and security experience.
VMware ESXi, vSphere, Windows Server, Active Directory, Group Policy, DNS, DHCP, PKI, Certificate Authorities, PowerShell, Python, Bash, JSON, SCCM, OS Deployment, NetApp, Dell EMC, Pure Storage, DISA STIGs, SQL Server, SharePoint
1w
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Senior Associate, Enterprise Application Developer
Washington or Baltimore
$62k-$99k/yr HybridFull Time
3+ YOEBachelor's degree in Computer Science or Information Systems; 3+ years in software development and automation; experience with Microsoft 365, SharePoint Online, CI/CD; scripting/programming in PowerShell, JavaScript/TypeScript, Python; Azure AD and APIs; strong problem-solving and communication.
Power Apps, Power Automate, Office Scripts, SharePoint Online, GitHub Actions, Azure, Azure AD, Graph API, Salesforce, SQL, JavaScript, TypeScript, Python, PowerShell
1mo
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Senior System Engineer (MBI Clearance)
Columbia, Maryland, United States
$140k-$150k/yr HybridMultiple Commitments Available
10+ YOETen years in systems engineering with Agile, cloud, and security focus; strong Linux/Windows, virtualization, scripting; U.S. citizenship or lawful permanent resident; ability to obtain security clearance.
Linux, Windows, VMware, Kubernetes, PowerShell, Python, Bash
2d
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Senior Systems Engineer (Production Support)
Columbia, Maryland, United States
RemoteFull Time
8+ YOE8+ years in systems engineering; production environment experience; strong cloud and automation skills; US citizenship and eligibility for security clearance.
AWS, Azure, Linux, Windows, Python, Bash, PowerShell, Ansible, Puppet, Chef, SaltStack, CloudFormation, DynamoDB, RDS, SQL, Git, GitHub Actions, CodeBuild, CodeDeploy, CloudWatch, S3, Step Functions, Batch Jobs, Dynatrace, ScienceLogic
22h
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Senior Network Engineer - Hybrid
Washington, District of Columbia, United States
$125k-$150k/yr HybridFull Time
5+ YOESenior network engineer with 5+ years, Bachelor in CS/Engineering, expertise in routing, switching, firewall, VPN, network security, leadership.
Routing, Switching, Firewall, VPN, VLAN, QoS, Ansible, Python, VMware, SDN
1mo
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Senior FPGA Engineer II
Chantilly or Tucson
OnsiteFull Time
8+ YOEBachelor’s in computer or electrical engineering with 8+ years experience in FPGA firmware design; ability to obtain US security clearance.
VHDL, Xilinx/AMD Versal, DDR4, AXI, Altium Designer, Python, MATLAB, C, DMA
2mo
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Senior Enterprise Endpoint Engineer
Washington, District of Columbia, United States
$80k-$157k/yr HybridFull Time
10+ YOE10 years enterprise IT experience; Windows and macOS admin; endpoint management systems; scripting; AD/Azure; project leadership; higher education experience preferred.
InTune, JAMF, Tanium, PowerShell, Bash, Python, Active Directory, Group Policy, Azure AD
2mo
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Senior Product Security Engineer
San Francisco or Denver or McLean or Austin or San Jose or New York
$145k-$261k/yr HybridFull Time
6+ YOE6+ years in product/application/cloud security; CI/CD security, Kubernetes, supply chain, IaC, scripting; leadership without formal authority.
GitHub Actions, Jenkins, GitLab CI, Kubernetes, Terraform, CloudFormation, Python, Go, Bash
3w
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Senior DevOps Engineer FedRAMP
Austin or Phoenix or Washington or Hoboken or Dallas
HybridFull Time
5+ YOE5+ years DevOps/SRE; US citizenship; FedRAMP Moderate/High experience; active security clearance or ability to obtain one; Terraform/Terragrunt, AKS, Helm, Istio, Argo CD, Azure DevOps; strong security controls knowledge.
Terraform, Terragrunt, AKS, Istio, Argo CD, Azure DevOps, OpenTelemetry, Azure Monitor, Prometheus, Grafana, OpenSearch, Kafka, Bash, Python, Go, Cosmos DB, Logic Apps
2mo
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Linux Engineer, Senior
Bethesda, Maryland, United States
$140k-$190k/yr OnsiteFull Time
8+ YOEActive DoD Top Secret clearance; 8+ years Linux system administration; 3+ years Ansible Platform experience; Python/Bash scripting; STIG/NIST 800-53; Associate degree or higher; IAT III, Security+ CE; RHCE or RHSA preferred; OpenShift/Kubernetes/Docker experience; Git/GitLab; cloud familiarity.
Red Hat Ansible Automation Platform, Ansible, OpenShift, Kubernetes, Docker, Python, Bash, RHEL, STIGs, NIST 800-53, ACAS, Git, GitLab, ServiceNow, Automation Controller, RBAC
1w
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Mechanical Engineer - Senior-Level
Elkridge, Maryland, United States
$82k-$126k/yr HybridFull Time
5+ YOESenior-level mechanical engineer with PE preferred; 5+ years in design for heavy industrial plants; ABET-accredited degree; leadership and mentoring abilities.
Python, MATLAB, Excel
2h
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Senior Engineer, Software Systems (R4903)
San Diego or Washington or Boston or San Francisco or Dallas
$110k-$170k/yr OnsiteFull Time
5+ YOE5+ years systems engineering with STEM degree; MBSE; cross-functional collaboration; C++/Python; ability to obtain US security clearance.
C++, Python, MBSE, Cameo API, Velocity Template Language
6d
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Staff SW Engineer, Ground & Control Services
Seattle or Herndon or United States
$155k-$180k/yr HybridFull Time
10+ YOE10+ years software development; proficient in Go/Python/C++; cloud and on-prem microservices; satellite ops experience; US citizenship.
Go, Python, C++, AWS, Azure, GCS, Kubernetes, Git, CI/CD, On-Prem, Terraform, Nomad
2mo
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IT Software Engineer Senior, Workday Conversion
College Park, Maryland, United States
$124k-$149k/yr OnsiteFull Time
4+ YOEBachelor’s degree; four years IT infrastructure experience; strong communication; leadership/mentoring; experience with Office 365 or Google Workspaces; knowledge of software engineering standards; Java or similar languages; ability to multitask.
HTML5, CSS3, JavaScript, Office 365, Google Workspaces, UML, Use cases, Source control, ETL tools, SQL, Python, AWS, Redshift, S3, Informatica, Datastage, Fabric
1mo
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Software and Systems Engineer
Chantilly or Herndon or McLean
OnsiteFull Time
5+ YOE5+ years professional software development; Python or Rust; Bash; distributed systems; CI/CD; Linux; strong communication.
Python, Rust, Bash, PostgreSQL, GraphDB, DynamoDB, AWS CDK, Docker, GitLab CI, Jenkins, CloudWatch, pytest, robot, behave, Linux, Embedded Linux
1w
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Lead Software Engineer-Embedded Computing Software-Onsite
Ashburn, Virginia, United States
$109k-$145k/yr OnsiteFull Time
8+ YOESenior software engineer with embedded systems experience, DoD security, Linux, C/C++, and embedded software development.
C, C++, Linux, VxWorks, Python, LabVIEW, Git, JIRA, Confluence, DOORS, Yocto, Petalinux, GCC
1w
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Full Stack Engineer III
Washington, District of Columbia, United States
$125k-$135k/yr HybridFull Time
5+ YOE5+ years web app development; mentorship; backend in PHP/Python/Node; MySQL; JavaScript with Vue/React/Angular; production web app experience; US work authorization.
PHP, Python, Node.js, MySQL, Vue, React, Angular, JavaScript
1w
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Senior DevOps Engineer - Build / Environment Manager
Arlington, Virginia, United States
HybridFull Time
10+ YOESenior DevOps and Cloud Engineering with 10+ years of experience; strong AWS expertise; lead DevOps function; CI/CD, infrastructure as code, security, observability; collaboration across teams.
GitHub Actions, Terraform, AWS CDK, Serverless Stack (SST), Ansible, CloudFormation, Docker, Kubernetes, Cloudflare, Prometheus, Grafana, Nagios, ELK Stack, Python, PowerShell, JavaScript, Java, Git
2mo
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Senior 3D Pipeline Engineer
Herndon, Virginia, United States
OnsiteFull Time
10+ YOE10+ years in studio pipelines; experience building tools, Python/Maya API, production workflows; strong collaboration and communication; US citizenship.
Maya, Python, Maya API, Kitsu, FTrack, databases, version control
1d
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Senior Mechanical Engineer (CFD and FEA)
Columbia, Maryland, United States
$110k-$130k/yr HybridFull Time
Lead CFD and FEA analysis for data center products; BS in mechanical engineering; hands-on CFD/FEA experience; HVAC/thermal-fluid systems knowledge.
ANSYS Fluent/CFX, SolidWorks Flow Simulation, Autodesk CFD, OpenFOAM, ANSYS Mechanical, Abaqus, NASTRAN, Onshape, SolidWorks, Creo, Python
2w
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Senior Security Engineer, Detection and Response
Austin or San Francisco or Seattle or Boston or Washington
$182k-$202k/yr RemoteFull Time
5+ YOE5+ years in detection and response or security engineering; strong software fundamentals; experience with cloud (AWS); experience with log analysis and endpoint detection tools.
Python, Go, Ruby, CloudTrail, GuardDuty, VPC flow logs, Datadog, Splunk, ELK, SentinelOne, CrowdStrike
1mo
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Senior Data Engineer (AWS, Azure, GCP)
Reston, Virginia, United States
HybridFull Time
5+ YOE5+ years data engineering on cloud platforms with ETL, data warehousing/lake, SQL/NoSQL, and programming (Python/Java).
AWS, Azure, GCP, Snowflake, Redshift, Databricks, Azure Data Factory, SSIS, Informatica, Matillion, Python, Java, R, SQL, Git, Jenkins, CI/CD, Jira
1mo
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Senior Full Stack AI Engineer
Jacksonville or Iselin or Washington or Richardson
$110k-$190k/yr OnsiteFull Time
7+ YOE7+ years software engineering; enterprise apps; React front-end; server-side frameworks; AI tooling; security and cloud knowledge.
React, NestJS, Express, Python, FastAPI, Django, NET Core, Claude Code, GitHub Copilot, Cursor, Replit
1mo
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Sr Software Engineer
Reston, Virginia, United States
OnsiteFull Time
7+ YOEActive Top Secret/SCI clearance, Bachelor's in CS or related field, 7+ years software development, strong Python and web framework experience, front-end skills, cloud/infrastructure tools, DoD 8140.03 IAT II certification or eligible.
Python, Django, Flask, FastAPI, REST, GraphQL, asyncio, Celery, SQLAlchemy, JavaScript, TypeScript, React, Vue, Angular, HTML5, CSS3, Webpack, Vite, PostgreSQL, SQLite, Redis, RabbitMQ, Kafka, Pytest, Jest, Selenium, Terraform, CloudFormation
1w
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Sr Software Developer
Fort Meade, Maryland, United States
$174k-$220k/yr OnsiteFull Time
20+ YOEActive FS poly clearance; 20+ years software engineering (or 4+ years with related experience); containerized apps with Kubernetes/Docker; Java REST; Git/Atlassian; Kotlin, Spring, Python, Mongo, NiFi.
Kubernetes, Docker, Java, REST, Git, Atlassian Tools, IntelliJ IDEA, Eclipse IDE, Kotlin, Spring, Python, MongoDB, NiFi, RabbitMQ
3w
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Aerospace Flight Software Engineer (cFS)
Greenbelt, Maryland, United States
OnsiteFull Time
15+ YOEDevelop, test, and integrate flight software; write cFS apps; work with C, Python, Ruby; 15+ years experience; BS in a related field.
C, Python, Ruby, COSMOS
1d
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Software Engineer
Annapolis Junction, Maryland, United States
$100k-$185k/yr OnsiteFull Time
Applied Network Solutions: Providing cybersecurity and network engineering services for government agencies.
4+ YOEActive TS/SCI clearance with polygraph; experience in Python, Spark, C++, data analytics; CS degree with extensive relevant experience.
Python, Spark, C++, Rust, Java, C, Docker, Kubernetes, Ansible, Linux
1mo
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Software Engineer
Chantilly or St. Louis or Gaithersburg or Denver
OnsiteFull Time
6+ YOESenior software engineer with 6+ years of experience; strong full-stack skills; cloud experience; DevSecOps focus; security clearance.
Python, Java, JavaScript, HTML, CSS, REST APIs, React, Angular, Vue.js, Node.js, Django, Flask, Docker, Kubernetes, AWS GovCloud, C2S, Azure, MySQL, PostgreSQL, SQL Server, Git, Jenkins, SonarQube, Nexus, Terraform, Keycloak, Vault, ArcGIS, OpenSearch, Elasticsearch
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
56% new in 30d
Salary visibility
59% show pay
Companies appearing in this market
Applied Network SolutionsBespoke TechnologiesELEVI AssociatesGCIRocket LabSageCor SolutionsSargent & LundyShield AI
Work location mix in visible results
Onsite: 54Hybrid: 27Remote: 6