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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.

YEAR

TCG Inc

Senior Python/Web Developer-4237734

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SAIC is a premier Fortune 500® technology integrator driving our nation's digital transformation. Our robust portfolio of offerings across the defense, space, civilian, and intelligence markets includes secure high-end solutions in engineering, IT modernization, and mission solutions. Using our expertise and understanding of existing and emerging technologies, we integrate the best components from our own portfolio and our partner ecosystem to deliver innovative, effective, and efficient solutions that are critical to achieving our customers' missions.

We are a team of 26,000 strong driven by mission, united purpose, and inspired by opportunity. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.1 billion. For more information, visit saic.com.

Science Applications International Corp

Front-End React Developer

Build and evaluate approved AI-enabled features using Microsoft Foundry (formerly Azure AI Foundry), Azure AI Search, and Azure AI services, with appropriate access controls, testing, and human review. The developer will build and modernize user interfaces, APIs, business services, and data integrations that support NIH Center for Scientific Review (CSR) operations.

Leidos Holdings Inc

Full Stack .NET Developer

The candidate will leverage their advanced expertise in SharePoint development, web coding, and user-focused content management to craft intuitive and efficient solutions enhancing collaboration, communication, and operational effectiveness for mission-critical operations. Key Responsibilities: The successful candidate must be able to: Develop, customize, and maintain SharePoint solutions across modern and legacy environments, including SharePoint 2013, 2019, and SharePoint Online.

SharePoint Frontend Developer

FULL_TIME

We seek developers with an AI‑first engineering mindset, able to choose between deterministic code, LLMs, and agents, and to design for probabilistic outputs with robust fallback strategies while balancing cost, latency, and reliability. Core GenAI & LLM expertise includes integrating LLMs into production, prompt engineering, structured outputs, RAG pipelines, effective context management, and quality/hallucination evaluation.

WISETEK PROVIDERS INC

AI Developer

Understanding and working (hands-on) knowledge of newer or emerging trends such as Big Data, Columnar databases, NoSQL, Hadoop, MapReduce, social media, data visualization, XML, and unstructured text is a plus. Experience in design, development and tuning industry leading ETL, Big Data, and/or Business Intelligence software tools in data intensive, large scale environments.

Rapinno Tech

Senior Ab Initio Developer (Big data/Hadoop)

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Preferred 5+ Years- Advanced knowledge in a variety of application support delivery of Cloud enabled application technologies including: Containerized or virtual machine-delivered servers such as Tomcat, NodeJS, or Django. Additional attributes needed: 9+ Years- Experience in the design, implementation, and delivery of applications based in Java, JavaScript, and Python with various persistence layers (SQL and NoSQL) preferred.

BayNova LLC

Full Stack Developer

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Job Title: Front-End Web DeveloperJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/SCI with PolygraphEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: Local* * * The Opportunity: CACI is seeking a Front-End Web Developer to design, build, and enhance intuitive, visually engaging, and accessible web applications supporting a government customer. Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.

CACI provides information solutions and services in support of national security missions and government transformation for Intelligence, Defense, and Federal Civilian customers. A member of the Fortune 1000 Largest Companies, the Russell 2000 Index, and the S&amp;P SmallCap 600 Index, CACI provides dynamic careers for over 15,800 employees working in over 120 offices worldwide. Visit <a href="http://www.caci.com" target="_blank" itemprop="url" mns_rt="Company">www.caci.com</a>. 
 
 We strive to sustain a corporate culture based on integrity - one that's focused on treating customers ethically and making their priorities our priorities. We pride ourselves in finding and hiring people with the highest intellectual capital, and providing them with challenging opportunities and encouraging their innovation and initiative.

CACI

Front-End Web Developer

Implement user-facing human-in-the-loop controls, including review queues, decision-support displays, overrides, approvals, escalation mechanisms, correction/feedback workflows, audit trails, and role-based access. Implement capabilities using approved LLMs, RAG pipelines, classification models, document intelligence, predictive analytics, generative AI, agentic workflows, and MCP-based services.

Swingtech

AI Developer- Hybrid (US Citizens/ Green Cards- Local to DMV only)

This position supports the following program: U.S. Department of Transportation (DOT), Office of the Secretary (OST), Working Capital Fund (WCF), Office of Financial Management (OFM) — WCF IT Financial Management, Cost Model Development, and Systems Integration Support. · Design and build the automated billing-cycle workflow end to end: scheduled ingestion, validation on load, execution of the approved calculation logic, self-populating exception queues, pre-bill review and approval flows, and publication handoffs.

BizFirst

Automation Developer

Foster Analytics Excellence Contribute reusable platform content, including ontology patterns, dashboard templates, and integration recipes, to support continuous curriculum refresh Document data sources, metrics definitions, and analytical methodologies for organizational knowledge. 4+ years of software or data engineering experience (data analysis or data science experience considered), including 1.5+ years hands-on with Palantir Foundry, Gotham, AIP, or MSS.

Agile Defense

MSS Developer - Falls Church

Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

Full Stack Web Developer

OTHER

Integrate unauthorized Azure resources into source control and refactor existing IaC repositories, with a focus on PowerShell scripts and advanced automation techniques. Proven hands-on proficiency with key Microsoft Azure services, including automation, IaC tools (PowerShell, ARM templates, Terraform or Ansible experience preferred).

Cayuse Holdings

Senior Cloud Developer

[AW]-iCims

Azure Infrastructure Management: Design, implement, and manage cloud infrastructure, including compute, networking, storage, and other Azure services, ensuring high availability and scalability. Infrastructure Modernization: Migrate existing unmanaged Azure resources into source control and refactor Infrastructure as Code (IaC) configurations, with an emphasis on PowerShell.

Cloud Developer, Mid

Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We are seeking a skilled and experienced Front-End Specialist to design and build accessible, high-performing user interfaces that present published products and content to Congress and the public.

Senior Front-End Developer

Knowledge of GL accounting, financial close and consolidation processes, payroll accounting and accruals, account reconciliations, journal entries and reclassifications, and retroactive and corrective adjustments. Responsibilities will include, but are not limited to: Lead end-to end design, development, configuration, and deployment of OneStream applications that focus on financial close, financial reconciliation, and payroll management.

Guidehouse

Sr Onestream Developer

Guidehouse seeks a Palantir Developer to support the Department of Defense (DoD) by designing, building, and operating data solutions in the Vantage platform, leveraging Palantir Foundry to enable authoritative, decision-grade financial and operational insights. Engineer and optimize data models, Delta tables, and curated datasets to support financial reporting, PPBE workflows, auditability, and mission analytics within Advana and downstream Foundry use cases.

Guidehouse Inc

Palantir Developer

The Appian Developer will be responsible for designing, developing, maintaining, and enhancing Appian-based applications and automated workflows supporting critical criminal justice operations. Amyx is seeking to hire an Appian Developer to support our Air Force Office of Special Investigations (AFOSI) Criminal Justice Information Center (CJIC) Professional Support Services contract in the Quantico, VA area.

Amyx, Inc. is a financially strong ISO 9001-2008 certified and CMMI-DEV Level 3 appraised small business founded in 1999 and headquartered in Reston, Virginia. Amyx’s services are listed below. These services, backed by proven solutions, are delivered by a workforce of exceptional professionals, many of whom possess over 25 years of experience. Amyx personnel have strong core values rooted in public service and hold an intense belief that service to the Government can make a difference. Additional information on our core capabilities can be found on our Core Capabilities page.

Amyx Inc

Appian Developer

The ideal candidate brings deep technical expertise in Esri enterprise architecture-including ArcGIS Enterprise/Portal, ArcGIS Pro, Experience Builder Developer Edition, and Survey123-alongside demonstrated experience exposing geospatial REST services to external enterprise systems, proprietary search engines, and lightweight 3D clients (ArcGIS Earth). Expose and optimize ArcGIS Server/Portal REST endpoints (Feature Services, Map Services, Query Services, and GeoJSON endpoints) for seamless consumption and indexing by proprietary enterprise search engines and external indexing engines.

Maxar Technologies Inc (Inactive)

Geospatial Developer

In this position, you will work within small teams to develop and deploy mission-critical systems, reverse-engineer network application protocols, and develop tools for complex data and network analysis. Pay Range: At GRVTY, we understand that compensation is influenced by many factors-such as geographic location, federal contract labor categories, wage rates, prior experience, skillsets, education, and certifications.

Systems Software Developer Jobs in Chantilly, VA

Senior Python/Web Developer-4237734 TCG Inc

Front-End React Developer Science Applications International Corp

Full Stack .NET Developer Leidos Holdings Inc

SharePoint Frontend Developer Science Applications International Corp

AI Developer WISETEK PROVIDERS INC

Senior Ab Initio Developer (Big data/Hadoop) Rapinno Tech

Full Stack Developer BayNova LLC

Front-End Web Developer CACI

AI Developer- Hybrid (US Citizens/ Green Cards- Local to DMV only) Swingtech

Automation Developer BizFirst

MSS Developer - Falls Church Agile Defense

Full Stack Web Developer CACI

Senior Cloud Developer Cayuse Holdings

Cloud Developer, Mid Cayuse Holdings

Senior Front-End Developer Science Applications International Corp

Sr Onestream Developer Guidehouse

Palantir Developer Guidehouse Inc

Appian Developer Amyx Inc

Geospatial Developer Maxar Technologies Inc (Inactive)

CNO Developer Verite Group, Inc.

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