UNKNOWN

ADAPTED_NOW

CALIBRE is an employee-owned mission focused solutions and digital transformation company is seeking a Full Stack Software Developer to develop, create, maintain, and write/code new (or modifies existing) computer applications, software, or specialized utility programs. Prefer an accredited Computer Science, Cyber Security, Information Technology, Software Engineering, Information Systems, or Computer Engineering degree; or a degree in a Mathematics or Engineering field.

YEAR

CALIBRE Systems, Inc. (CALIBRE) is an employee-owned management consulting and digital transformation company supporting government and industry. CALIBRE is committed to the success of our clients, and delivers enduring solutions that solve management, technology, and program challenges. CALIBRE is a leading provider of solutions serving clients in the public and private sectors - Defense, Federal / Civil and Commercial corporations. Our employees - operating from our Alexandria, Virginia headquarters, five regional offices across the U.S. and in two foreign countries - are committed to delivering high quality solutions. 
CALIBRE and its subsidiaries are an Equal Opportunity Employer and supports transitioning service members, veterans and individuals with disabilities. We offer a competitive salary and full benefits package. To be considered, please apply via our website at <a href="https://urldefense.com/v3/__http:/www.calibresys.com/__;!!D1XWH5In!Qkx82SYK92oKjJ7-Frwd6F0l0fYP5PYZB0F9SIM2mYfqkXijbHOeiSxf36SM6DfGX2nbkigGxcvTEcNqxqMyCsgPBQ$">www.calibresys.com</a>. Come join our dynamic team. #CALIBRECareers

Calibre Systems

Software Developer Intermediate

Software Developer - Advanced

FEED

This work aligns with the FAA’s broader initiative to modernize legacy flight service capabilities, replacing aging infrastructure with scalable, cloud-based platforms designed to improve safety and operational efficiency—particularly in remote and high-dependency aviation environments. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com .

Everything we do is built on our commitment to do the right thing for our customers, our employees, and our communities. Learn more about the values and culture that are the foundations of our business.

Leidos

Software Developer

Appcast Exclusive 1

Senior Software Developer

Jr Software Developer

As a Washington Post Top Workplace award winner for the past THIRTEEN years in a row, the Top Workplaces USA for the past five years, and a recipient of the Companies As Responsive Employers (CARE) Award for the past six years, Dev Technology employees enjoy: Generous and flexible time-off policy. Use AI-powered development tools such as Kiro, Amazon Q Developer, GitHub Copilot, or similar agentic AI environments for code generation, refactoring, testing, and specification-driven development.

Dev Technology Group

Senior Full Stack Developer – (React, Node, AWS & Agentic AI)

pandologic_px

If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com . July 13, 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.

Sr. Software Developer

CRAWL_WRAP

You will tackle a diverse set of challenges, from developing robust API endpoints and modifying complex open-source systems like Trino, to architecting intricate identity federation solutions, managing large-scale data ingest, and streamlining our deployment automation. Enlighten, honored as a Top Workplace from USA Today, is a leader in big data solution development and deployment, with expertise in cloud-based services, software and systems engineering, cyber capabilities, and data science.

HII's Mission Technologies division

Software Engineer (Hybrid) - 30870

Java Developer, Scala Developer, Python Developer, Software Engineer, Backend Developer, Full Stack Developer, Data Engineer, Distributed Systems Developer, Big Data Developer, API Developer, etc. Computer Science, Software Engineering, Information Technology, Computer Engineering, Data Science, Information Systems, Applied Mathematics, Artificial Intelligence, Systems Engineering, Computational Science, etc.

Cymertek

Java, Scala, Python Developer

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.

CGI Inc

Python Developer, Senior TS/SCI with Poly REQUIRED

Support critical quarterly production runs for financial reporting by monitoring execution, troubleshooting issues, and ensuring integrity, accuracy, and timeliness of outputs. Looking specifically for strong Python developers who understand design patterns and solid software engineering practices.

Expert In Recruitment Solutions

Python Developer

jobdiva

OTHER

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.

<blockquote>
<h5>Working at NT Concepts is being part of a thriving, agile company&nbsp;dedicated to solving our client's most critical challenges in an open, positive, and rewarding work environment. In line with our Core Values, we're passionate, driven, and committed to doing great work that exceeds expectations.&nbsp;</h5>
<h5>Our teams are made up of the brightest and most dedicated people in the world. Our experts fuse business process with technical expertise to build and optimize end-to-end data-driven solutions for the Intelligence and Defense Communities. Together we work to ensure the integrity of the government workforce and the safety of our national security. Join us and discover a company that truly cares about the employee journey!</h5>
&nbsp;
TOTAL REWARDS&nbsp;
<ul>
<li data-aria-posinset="1" data-aria-level="2">Medical/dental/vision coverage&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="2" data-aria-level="2">401(k) Plan (immediate vesting in company match)&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="3" data-aria-level="2">Company-paid life/AD&amp;D insurance&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="4" data-aria-level="2">Company-paid long- and short- term disability&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="5" data-aria-level="2">Company-paid Employee Assistance Program (EAP)&nbsp;&nbsp;</li>
<li data-aria-posinset="6" data-aria-level="2">Voluntary life/AD&amp;D&nbsp;&nbsp;</li>
<li data-aria-posinset="7" data-aria-level="2">Flexible Spending Accounts available for medical, dependent care, and transit/parking&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="8" data-aria-level="2">Education Savings Plan (529)&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="9" data-aria-level="2">AFLAC&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="10" data-aria-level="2">Identity-theft prevention&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="11" data-aria-level="2">Travel assistance&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="12" data-aria-level="2">Paid time off and other leave&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="13" data-aria-level="2">Paid holidays&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="14" data-aria-level="2">Personal time off&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="15" data-aria-level="2">Paid community service day&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="16" data-aria-level="2">Telecommuting&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="17" data-aria-level="2">Flexible work arrangements&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="18" data-aria-level="2">Health advocacy&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="19" data-aria-level="2">Free snacks! (at some locations)&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="20" data-aria-level="2">Clearance opportunities&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="21" data-aria-level="2">Paid training opportunities&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="22" data-aria-level="2">Events, conferences, and memberships&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="23" data-aria-level="2">R&amp;D programs&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="24" data-aria-level="2">Generous Spot Bonuses&nbsp;&nbsp;&nbsp;</li>
<li data-aria-posinset="25" data-aria-level="2">Employee referral opportunities</li>
</ul>
</blockquote>

NT Concepts

Senior Python Developer

greenhouse_via_bold

Our deep industry, process and engineering expertise enables us to build an organization's unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. As a Senior Java/Python Developer, you will make an impact by designing, developing, and supporting scalable enterprise-grade applications that drive digital transformation within the Capital Markets and Banking domain.

Cognizant is one of the world's leading professional services companies, transforming clients' business, operating and technology models for the digital era. Our unique industry-based, consultative approach helps clients envision, build and run more innovative and efficient businesses. Headquartered in the U.S., Cognizant, a member of the NASDAQ-100, is ranked 230 on the Fortune 500 and is consistently listed among the most admired companies in the world. We're driven by a passion to help our clients build stronger, more agile and more innovative businesses. Cognizant enables global enterprises to address a dual mandate: to make their current operations as efficient and cost-effective as possible and to invest in innovation to unleash new potential across their organizations. What makes Cognizant unique is our ability to help clients meet both challenges. We help them enhance productivity by ensuring that vital business functions work faster, cheaper and better. And, our ability to conceptualize, architect and implement new and expanded capabilities allows clients to transform legacy models to take their business to the next level.

Cognizant Technology Solutions Corp

Senior Java/Python Developer

To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave.

General Dynamics Information Technology solves our customers’ challenges through future-focused technology and services, ingenuity and deep mission-knowledge. Partnering with government, defense, the intelligence community, industry leaders and cutting-edge technology companies, we deliver solutions that make a difference – helping our customers to advance mission performance, transform operations and discover opportunities to build a better future.

 Headquartered in Fairfax, Va., with major offices worldwide, General Dynamics IT and General Dynamics Mission Systems form the Information Systems and Technology (IS&T) business group of General Dynamics. IS&T and the Aerospace, Combat Systems and Marine Systems groups form General Dynamics Corp.

General Dynamics Information Technology

Full Stack Python Developer - TS/SCI with Polygraph

HOUR

This is a backend-focused software engineering and platform engineering role involving development, automation, cloud infrastructure tooling, CI/CD pipelines, troubleshooting, and internal developer support. Experience developing or supporting backend applications, automation tools, or developer platforms.

Artech LLC

Python Developer with Groovy

The client is seeking experienced Application Development Leads to support strategic engineering initiatives within enterprise developer platforms and open-source enablement programs. These roles will focus on backend development, developer experience, CI/CD automation, cloud-native infrastructure, and AI-assisted development workflows.

GD Information Technology

The ideal candidate will be comfortable working across both backend and frontend components and will be part of a hybrid work arrangement, requiring three days onsite per week. This role involves developing and maintaining applications and engineering tools using Java, Python, and Angular.

Python , Java Developer

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. You'll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.

Python Developer Jobs in Reston, VA

Software Developer Intermediate Calibre Systems

Software Developer - Advanced Calibre Systems

Software Developer Leidos

Senior Software Developer Leidos

Jr Software Developer Leidos

Senior Full Stack Developer – (React, Node, AWS & Agentic AI) Dev Technology Group

Sr. Software Developer Leidos

Software Engineer (Hybrid) - 30870 HII's Mission Technologies division

Java, Scala, Python Developer Cymertek

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

Python Developer Expert In Recruitment Solutions

Senior Python Developer NT Concepts

Senior Java/Python Developer Cognizant Technology Solutions Corp

Full Stack Python Developer - TS/SCI with Polygraph General Dynamics Information Technology

Python Developer with Groovy Artech LLC

Python Developer Artech LLC

Full Stack Python Developer - TS/SCI with Polygraph GD Information Technology

Python , Java Developer Artech LLC

AWS Python Developer with ETL CGI Inc

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