1,019 Results for

Python Jobs in Reston, VA

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Senior Software Developer with Python experience Select Search Associates

Fairfax, Virginia

Experience developing applications using Generative AI technologies, including Retrieval-Augmented Generation (RAG), Large Language Models (LLMs), and LLM-enabled workflows. Works as a member of an agile scrum team and participates in regular agile ceremonies applying scrum methodologies – daily stand up, planning, sprint reviews, demos, retrospectives.

6 days ago

Full Stack Python AWS Expertise Cb

Reston, Virginia

Title: Full Stack Python AWS Expertise Location: Reston, VA (Onsite) Client: Fannie Mae US Citizens OR GC This is the full JD: Senior Software Engineer - Microservices will be responsible for designing, developing, and maintaining scalable, high-performance microservices that support the organization’s core platforms and applications. Design and implement scalable, resilient, high performing, optimized and secure microservices using modern frameworks and technologies.

30+ days ago

Python Developer, Senior TS/SCI with Poly REQUIRED CGI Inc

Arlington, VA

However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with CGI's legal duty to furnish information. Test Design, Integration, and Automation: Design and integrate code to validate RESTful APIs and microservices, ensuring secure and efficient communication between different systems and applications with automated validation.

30+ days ago

Senior Python Developer NT Concepts

Chantilly, VA

$120,336–$180,504 / year

We deliver end-to-end data and technology solutions that advance the modernization, transformation, and automation of the national security mission—solutions with real impact developed in a strong engineering culture that encourages technical growth, leadership, and creative “big idea” problem-solving. Mission Focus: As a Senior Python Developer you will have the unique opportunity to solve hard problems and help turn complex concepts into reality to advance and enhance systems supporting the defense of our nation.

30+ days ago

Python AI/ML developer with Lang chain TechDigital

Washinton, DC

extracting and managing access control data from platforms like Azure, SharePoint, Java, NET, WordPress, etc. Cloud and Microsoft Technologies: Proficiency with Azure services, Microsoft Graph API, and.

30+ days ago

Data Engineer 4 (Python, PySpark, AWS) Capital One Financial Corp

McLean, VA

$197,300–$225,100 / year

McLean, VA: $197,300 - $225,100 for Data Engineer 4. Candidates hired to work in other locations will be subject to the pay range associated with that location, and the actual annualized salary amount offered to any candidate at the time of hire will be reflected solely in the candidate's offer letter. Utilize programming languages such as Python and Spark, along with open-source relational and NoSQL databases, and cloud-based data warehousing platforms including Databricks and Snowflake.

18 days ago

Python Lead Developer TechDigital

Washington, DC

30+ days ago

Python - AI/ML TechDigital

McLean, VA

API and Connector Development: Experience in developing API connectors using Python for extracting and managing access control data from platforms like Azure, SharePoint, Java, NET, WordPress, etc. • Cloud and Microsoft Technologies: Proficiency with Azure services, Microsoft Graph API, and experience integrating Python applications with Azure for access control reviews and reporting.

30+ days ago

Data Engineer 4 (Python, AWS, SQL, GenAI) (Enterprise Platforms Technology) Capital One Financial Corp

McLean, VA

$197,300–$225,100 / year

McLean, VA: $197,300 - $225,100 for Data Engineer 4. Riverwoods, IL: $179,400 - $204,700 for Data Engineer 4. Candidates hired to work in other locations will be subject to the pay range associated with that location, and the actual annualized salary amount offered to any candidate at the time of hire will be reflected solely in the candidate's offer letter. Utilize programming languages such as Python and Spark, along with open-source relational and NoSQL databases, and cloud-based data warehousing platforms including Databricks and Snowflake.

19 days ago

CNO Software Developer with C and Python Cymertek

Chantilly, Virginia

CNO Software Engineer, Network Security Software Developer, Network Operations Engineer, Cybersecurity Software Developer, C and Python Software Engineer, Systems Software Developer, Embedded Software Engineer, Security Systems Developer, Network Infrastructure Developer, Cyber Defense Software Engineer, etc. Computer Science, Cybersecurity, Network Engineering, Software Engineering, Information Technology, Computer Engineering, Electrical Engineering, Applied Mathematics, Information Systems, Data Science, Telecommunications, etc.

30+ days ago

Senior Python Developer Leidos Holdings Inc

Chantilly, VA

$131,300–$237,350 / year

Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

30+ days ago

Senior Python/Web Developer-4237734 TCG Inc

Washington, DC

$130,000–$150,000 / year

TCG is recognized for treating employees well, in fact, in 2025 The Washington Post named TCG as a "Top Workplace" for the eleventh straight year based on how our employees feel about the company, the benefits TCG offers, and the work/life balance that our staff achieves. Applicants must reside within a commutable distance of Washington, D.C. REQUIRED SKILLS: A minimum of five (5) years experience with web development using HTML, CSS, JavaScript, Python, jQuery, React.js, and Angular.

4 days ago

Senior Software Engineer (Python), Intelligence Systems ANDURIL INDUSTRIES

Reston, VA

$191,000–$253,000 / year

To ensure your safety and help you navigate your job search with confidence, please keep the following critical points in mind: No Financial Requests: Anduril will never solicit payment or demand personal financial details (such as banking information, credit card numbers, or social security numbers) at any stage of our hiring process. Lead rigorous root cause analysis for identified test failures, collaborating closely with engineering teams to diagnose issues, propose solutions, and drive the implementation of effective corrective actions.

30+ days ago

Senior Software Test Engineer (Python), Intelligence Systems ANDURIL INDUSTRIES

Reston, VA

$191,000–$253,000 / year

13 days ago

Enterprise - Software Engineer - Python, Kafka, Distributed Erias Ventures

Herndon, Virginia

We are seeking engineers who wish to grow their careers and want to become part of a technically strong and growth-oriented company focused on bringing innovative solutions to the difficult mission problems facing our customers. Description As a Software Development Engineer in this role, you will focus on designing and implementing robust event-driven architectures that enhance observability and enable comprehensive tracking of events across diverse data pipelines.

30+ days ago

Senior Python Developer Leidos

Chantilly, Virginia

August 31, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

30+ days ago

Backend Python Engineer - Clearance Required BTI360

Tysons Corner, VA

$96,900–$247,900 / year

Experience working with NLP libraries (e.g., spaCy, NLTK, Hugging Face Transformers) and integrating with commercial or custom generative AI services such as OpenAI, Azure Cognitive Services, or proprietary models. Experience working with streaming or event-driven architectures such as SNS/SQS (preferred), Kafka, Kinesis, AWS Step Functions, or Event Bridge.

30+ days ago

Enterprise - DevOps Engineer - AWS, Git, Python Erias Ventures

Columbia, Maryland

The ideal candidate will have strong working knowledge in Kubernetes and Container Orchestration, Configuration Management, CI/CD, Automation, AWS, Linux systems administration, Scripting in Bash and Programming in Python, and a background in Big Data solutions. Five plus (5+) years of experience in DevOps Engineering or Software Development and Bachelors in related field; or three (3) years relevant experience with Masters in related field; or High School Diploma or equivalent and nine (9) years relevant experience.

30+ days ago

Enterprise - DevOps Engineer - Kubernetes, AWS, Python Erias Ventures

Columbia, Maryland

$150,000–$250,000 / year

Experience Nine plus (9+) years of experience in DevOps Engineering or Software Development and Bachelors in related field; or seven (7) years relevant experience with Masters in related field; or High School Diploma or equivalent and thirteen (13) years relevant experience. The ideal candidate will have strong working knowledge in Kubernetes and Container Orchestration, Configuration Management, CI/CD, Automation, AWS, Linux systems administration, Scripting in Bash and Programming in Python, and a background in Big Data solutions.

6 days ago

Senior Full Stack Python Developer (On -Site) Lion Federal

Falls Church, Falls Church

Lion Federal is a dynamic and rapidly expanding tech company dedicated to delivering cutting-edge AI-powered solutions tailored for enterprise-level clients, including the U.S. Federal government. You will collaborate with cross-functional teams, including front-end developers, AI/ML experts, and DevOps, to ensure the seamless execution of our product’s architecture and functionality.

30+ days ago

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Python Jobs in Reston, VA

Senior Software Developer with Python experience Select Search Associates

Full Stack Python AWS Expertise Cb

Python Developer, Senior TS/SCI with Poly REQUIRED CGI Inc

Senior Python Developer NT Concepts

Python AI/ML developer with Lang chain TechDigital

Data Engineer 4 (Python, PySpark, AWS) Capital One Financial Corp

Python Lead Developer TechDigital

Python - AI/ML TechDigital

Data Engineer 4 (Python, AWS, SQL, GenAI) (Enterprise Platforms Technology) Capital One Financial Corp

CNO Software Developer with C and Python Cymertek

Senior Python Developer Leidos Holdings Inc

Senior Python/Web Developer-4237734 TCG Inc

Senior Software Engineer (Python), Intelligence Systems ANDURIL INDUSTRIES

Senior Software Test Engineer (Python), Intelligence Systems ANDURIL INDUSTRIES

Enterprise - Software Engineer - Python, Kafka, Distributed Erias Ventures

Senior Python Developer Leidos

Backend Python Engineer - Clearance Required BTI360

Enterprise - DevOps Engineer - AWS, Git, Python Erias Ventures

Enterprise - DevOps Engineer - Kubernetes, AWS, Python Erias Ventures

Senior Full Stack Python Developer (On -Site) Lion Federal

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