117 senior fastapi developer jobs at 63 companies in Fairfax, VA
3mo
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Senior Python Developer (Lead)
Washington, District of Columbia, United States
RemoteFull Time
7+ YOE7+ years software development, strong Python 3.x experience, FastAPI/Flask/Django, REST API design, Agile and CI/CD/DevSecOps experience, leadership experience, eligible for Public Trust clearance.
Python 3.x, FastAPI, Django, Flask, AWS, Azure, Google Cloud Platform, Docker, Kubernetes
2mo
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Python Developer (Mid-Senior)
Chantilly, Virginia, United States
OnsiteFull Time
10+ YOE10+ years Python development; FastAPI; AWS; TS/SCI with polygraph; U.S. citizenship; Bachelor's degree or equivalent experience; on-site in Chantilly, VA.
Python, FastAPI, SQLAlchemy, AWS, Kubernetes, Jenkins, GitHub, OpenSearch, Elastic, Airflow, PySpark, Trino, Linux, Docker, Helm, Makefiles, Java, Perl, C, C++, HTML, JavaScript, JSON
1mo
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Senior AI Developer
Dahlgren, Virginia, United States
$106k-$185k/yr HybridFull Time
3+ YOERequires active Secret clearance and ability to obtain TS/SCI, DoDD 8140.01 IAM Level I, strong Python experience (FastAPI a plus), experience with AI frameworks (Haystack, LangChain, LlamaIndex), RAG workflows, context engineering, MCP servers, and model evaluation.
Python, FastAPI, Haystack, LangChain, LlamaIndex, Model Context Protocol (MCP), RAG
1mo
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Senior Software Engineer
Somerville or Washington
$160k-$190k/yr HybridFull Time
5+ YOEBachelor's in CS/Math/Engineering/Science, 5+ years full-stack/backend experience, cloud microservices, cryptography, Istio, FastAPI, Docker, Helm, SQL/NoSQL, CI/CD, automated testing, strong communication.
Istio, FastAPI, Docker, Helm, OAuth2, IETF RFCs, SQL, NoSQL
2mo
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Senior Research Engineer - Experimental Engineering
Yonkers or Washington or Colchester or Arizona or California or Connecticut or Illinois or Maryland or Massachusetts or Michigan or New Hampshire or New Jersey or New York or Texas or Vermont or Virginia or District of Columbia
$115k-$160k/yr RemoteFull Time
Senior research engineer with deep full-stack software engineering experience, strong applied AI/ML knowledge, prototyping and R&D experience, Python/FastAPI and frontend (React/React Native) familiarity, and ability to lead experiments and mentor engineers.
AI, Machine Learning, Python, FastAPI, React, React Native, RAG
1mo
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Full-stack Developer
McLean, Virginia, United States
$160k-$190k/yr OnsiteFull Time
8+ YOESenior-level full-stack development experience (8+ years), strong JavaScript/TypeScript and Python skills (Hono.js, fastapi), experience with Vue.js, Tailwindcss, CDKTF/terraform, relational databases/SQL, and cloud/DevOps.
JavaScript, Hono.js, Python, fastapi, TypeScript, Vue.js, Tailwindcss, CDKTF, terraform, SQL, Docker, AWS, Git
2mo
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Software Test Automation and QA Developer, Senior
Laurel, Maryland, United States
$87k-$198k/yr OnsiteFull Time
4+ YOE4+ years in Python/Linux; 3+ years automated testing; Java, JSON, VS Code; Docker/Podman; Git, Pydantic, FastAPI, ReST; version-control in pipelines; TS/SCI with poly; BS in CS/Engineering +5 years or 10+ years without degree.
Python, Linux, Java, JSON, VS Code, Docker, Podman, Git, Pydantic, FastAPI, ReST
3w
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Senior Lead Developer
Washington, District of Columbia, United States
$150k-$162k/yr HybridFull Time
10+ YOEBachelor's degree,10+ years software development,5+ years federal systems experience,technical leadership,expertise with Python,C#,JavaScript/TypeScript,React,.NET,Azure,CI/CD,databases,DevSecOps and secure coding.
Python, React, .NET, Microsoft Power Platform, SQL Server, PostgreSQL, Azure, Azure Government, Azure App Services, Azure Functions, Azure Storage, Azure Key Vault, Microsoft 365, Power Apps, Power Automate, Power Pages, Power BI, SharePoint Online, Microsoft Teams, FastAPI, Flask, Django, ASP.NET Core, JSON, XML, PostgreSQL, Entity Framework, Dataverse, Git, Azure DevOps, GitHub, CI/CD pipelines, Docker, Kubernetes
3w
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Senior AI Software Engineer
Washington or United States
$180k-$210k/yr HybridFull Time
10+ YOE10+ years building distributed software, technical lead experience, Bachelor\u000degree, strong Python (asyncio, FastAPI, Pydantic), Docker, Kubernetes, Terraform, CI/CD, AWS/Azure, SDR and edge computing experience preferred; U.S. citizenship required for clearance eligibility.
Python, FastAPI, Pydantic, asyncio, Docker, AWS, Azure, GitLab CI, GitHub Actions, Kubernetes, Terraform, Helm, GNU Radio, USRP, Ettus USRP, SoapySDR, UHD
4w
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Senior AI Software Engineer
Washington, District of Columbia, United States
$180k-$210k/yr HybridFull Time
10+ YOEBachelor's in CS/EE/Software/Data Science,10+ years software engineering,technical lead experience,Python/FastAPI/asyncio,distributed systems,Docker,Kubernetes,CI/CD,AWS or Azure,hardware-software integration,ability to obtain US secret/top secret clearance.
Python, asyncio, FastAPI, Pydantic, Docker, AWS, Azure, GitLab CI, GitHub Actions, Kubernetes, Terraform, Helm, GNU Radio, Ettus USRP, USRP, SoapySDR, UHD
1w
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Software Engineer Level 4
Elkridge, Maryland, United States
OnsiteFull Time
Active TS/SCI with CI Polygraph, backend development, data engineering, API development, Python, FastAPI, PostgreSQL, Elasticsearch, and high-performance integrations.
Python, FastAPI, PostgreSQL, SQL, Elasticsearch
2mo
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Software Engineer - Senior
Bolling AFB, District of Columbia, United States
OnsiteFull Time
8+ YOE8+ years hands-on software development, TS/SCI clearance with CI Poly, full stack with modern JS and backend, cloud-native, DevSecOps, leadership.
React, Angular, Vue, Python, FastAPI, Django, Node.js, Java, Spring, Go, REST, GraphQL, PostgreSQL, MySQL, MongoDB, Redis, Docker, Kubernetes, OAuth, SAML, OIDC, MCP, GitLab, SAST, DAST
2mo
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Software Test Automation and QA Developer, Senior
Laurel or Columbia
$87k-$198k/yr HybridFull Time
4+ YOE4+ years Python/Linux development; 3+ years software testing/automation; Java/JSON/VS Code; Docker/Podman; frameworks/tools like Git, FastAPI, ReST, Pydantic; CS or Engineering degree with 5+ years software experience or 10+ years in lieu of degree; TS/SCI with poly.
Python, Java, JSON, VS Code, Docker, Podman, Git, FastAPI, ReST, Pydantic, Linux
1mo
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Senior Full Stack Developer
McLean or Tysons Corner
OnsiteFull Time
6+ YOEUS citizen or green card holder able to obtain Public Trust; Bachelor's degree or +4 years experience; 6+ years full‑stack development; 3+ years AWS cloud development; proficiency in Python and JavaScript; experience with Django/Flask alternatives and modern frontend frameworks.
Python, JavaScript, Django, Vue.JS, Flask, FastAPI, Falcon, SQLAlchemy, React, Svelte, Angular, Docker, EKS/Kubernetes, AWS Step Functions, Event Bridge, AWS Lambda, AWS API Gateway, Elasticsearch, Redis, Memcached, Amazon Relational Database Service (RDS) for Postgres, MongoDB, AWS Serverless Application Model (SAM), AWS
3w
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Full Stack Developer
Washington or Ashburn or Manassas
HybridFull Time
5+ YOE5+ years full-stack experience with Python, FastAPI, ReactJS, PostgreSQL, Docker, and AWS; CI/CD and trunk-based development; public trust clearance required; bachelor's degree or equivalent preferred.
Python, FastAPI, ReactJS, PostgreSQL, Docker, AWS, ECS, EKS, pytest, Jest, React Testing Library, OpenAPI/Swagger, CI/CD
1mo
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Senior AI/ML Software Engineer - Remote
Eden Prairie or Minneapolis or Washington or United States
$120k-$215k/yr RemoteFull Time
5+ YOEB.S. in computer science or related field; 5+ years software engineering experience with 3+ years operating production ML systems; expert Python; FastAPI; Kubernetes, Docker, Helm; MLOps practices including deployment, versioning, and monitoring.
Python, FastAPI, Kubernetes, Docker, Helm, AzureML, DataBricks, Azure Kubernetes
2mo
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GenAI Python Systems Engineer –Senior Manager
Chicago or Raleigh or Charlotte or Cincinnati or Cleveland or Columbia or Columbus or Dallas or Baltimore or Richmond or Rosemont or Sacramento or Boston or St. Louis or Salt Lake City or San Antonio or San Diego or San Francisco or Silicon Valley or Seattle or Spartanburg or Albany or Stamford or Tampa or Atlanta or Toledo or Austin or Tulsa or Washington or Denver or Des Moines or Detroit or Buffalo or Florham Park or Kansas City or Las Vegas or Little Rock or Los Angeles or Louisville or Birmingham or Fayetteville or Miami or Milwaukee or Minneapolis or Nashville or New Orleans or New York or Oklahoma City or Philadelphia or Phoenix or Pittsburgh or Portland
$124k-$280k/yr HybridFull Time
8+ YOESenior Manager level with 8+ years of experience; proficient in Python, SQL, FastAPI; cloud certifications a plus; willing to travel up to 80%; Bachelor's degree required.
Python, SQL, FastAPI, Cloud Platforms, LLM techniques, Data Warehousing, Data Lakes, IAM
2w
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Full Stack Developer
Suitland, Maryland, United States
HybridFull Time
5+ YOEActive TS/SCI clearance,5+ years software development,Python backend (Django/FastAPI),React/Next.js frontend,PostgreSQL,AW S,Terraform,Keycloak/OIDC/SAML/CAC-PIV,STIG/FIPS secure development,GitLab CI/CD,DevSecOps and AI-assisted tooling.
Django, FastAPI, Python, React, Next.js, PostgreSQL, AWS, Aurora, EKS, Kubernetes, Helm, S3, IAM, VPC, KMS, Terraform, Keycloak, OIDC, SAML, CAC-PIV, Pydantic, GitLab CI/CD, Git, SAST, DAST, SCA, SBOM, AI-assisted development tools, STIG, FIPS
1mo
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Full Stack Developer
Chantilly, Virginia, United States
$112k-$222k/yr OnsiteFull Time
5+ YOE5+ years software development experience with Python (Flask/Django/FastAPI), APIs, database/datalayer work, front-end development (JavaScript/React/Angular/Vue), cloud (AWS), containers, and Agile/Scrum; active TS/SCI with Poly required; US citizenship and unrestricted work authorization required.
Python, Flask, Django, FastAPI, SQL, SQLAlchemy, JavaScript, TypeScript, CSS, React, Angular, Vue, Amazon Web Services (AWS), uv, ruff, pyright, pytest, coverage, Selenium, Karma, WordPress, MongoDB
1d
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Sr Software Engineer - Columbia, MD
Columbia, Maryland, United States
$129k-$229k/yr HybridFull Time
SME-level full-stack engineer with expertise in React, Python (FastAPI/Django), AWS, containerization, Kubernetes, secure development, and technical leadership for DoD/IC programs.
React, JavaScript, TypeScript, Python, FastAPI, Django, AWS, Docker, Kubernetes, Terraform, Ansible, GitOps