UNKNOWN

FEED

Our talented team is at the forefront of Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management , delivering innovative solutions that support critical national security missions. Located just outside Washington, D.C., Bethesda combines proximity to the nation's leading defense, intelligence, and technology organizations with vibrant neighborhoods, highly regarded schools, excellent dining and entertainment, beautiful parks, and convenient access to the greater National Capital Region.

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

Java Developer (SME)

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We’re looking for an experienced back-end-focused developer with the software engineering skills it takes to identify potential risks, contribute to solution development, and create efficient and effective systems for our clients. Onsite : If this position is listed as onsite, work will primarily be performed full-time at a customer facility, where employees will collaborate directly with colleagues and customers as required by the role.

YEAR

Booz Allen is an advanced technology company. We build commercial-grade products and solutions for America’s most critical defense, civil, and national security priorities.

Booz Allen Hamilton

Node.js Developer SME

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We bring cross-industry expertise in areas including defense, healthcare, finance, and IT sectors—delivering solutions in cybersecurity, data analytics, enterprise reporting, database management, and software development. Business System Solutions is a certified Service-Disabled Veteran-Owned Small Business (SDVOSB) and is a trusted provider of comprehensive IT services and solutions for both government, commercial and small business clients.

Business System Solutions

Application Programmer / Developer (Remote)

Additionally, based on a DevOps framework, you will participate in and/or direct major deliverables of projects through all aspects of the software development lifecycle, including scope and work estimation, architecture and design, coding, and unit testing. January 21, 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. Marklogic Developer

Demonstrated experience performing ETL activities including, but not limited to, parser development and deployment; data flow management; implementing data lifecycle policies; troubleshooting data access issues; and developing data models. The candidate will provide technical expertise and support in the design, development, implementation and testing of customer tools and applications in support of Extracting, Transforming and Loading of data into an enterprise Data Lake.

ETL Java Developer (SME)

You'll collaborate closely with data scientists, systems engineers, and client stakeholders to evaluate emerging AI technologies, optimize network throughput, and ensure enterprise-grade security and reliability across diverse operational environments. By balancing innovation with architectural rigor, you will solve critical integration bottlenecks, establish MLOps best practices, and scale intelligent systems that empower clients to make data-driven decisions faster and more effectively.

Booz Allen Hamilton Inc.

AI Developer And Engineer

Please note the targeted compensation range is provided as an estimate, and any actual compensation offer may vary depending on the needs of the company, or an applicant's skillset, competencies, experience, education, certifications, location, or other factors. This is a hands-on role where engineering, data modeling, and collaboration with cross-functional teams converge to deliver measurable impact on national-security-focused solutions.

BigBear.ai

Application Developer - Metadata Store Focus

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Core responsibilities include leading the design and implementation of data systems with both web and database components, analyzing and maintaining existing databases and web interfaces, and adding new features to operational systems. RRC personnel can expect to work across all functional areas: systems engineering, development, integration and test, deployment and O&M, and experience the direct mission feedback from the customer and seeing your project provide real-world contributions that make a significant difference.

Rincon Research Corp

Advanced Full Stack Developer

The Enterprise Applications Senior Oracle APEX Developer is responsible for designing, developing, maintaining, and supporting enterprise applications, user interfaces, workflows, and data-driven solutions using Oracle Application Express (APEX) within the organization's Enterprise Resource Planning and enterprise applications environment. This role partners with business stakeholders, functional analysts, and technical teams to translate business requirements into scalable, secure, and user-friendly applications that support operational and strategic business needs.

Who We Are
Based in California, AeroVironment (AVAV) is a global leader in unmanned aircraft systems (UAS) and tactical missile systems. Founded in 1971 by celebrated physicist and engineer, Dr. Paul MacCready, we&rsquo;ve been at the leading edge of technical innovation for more than 45 years. Be a part of the team that developed the world&rsquo;s most widely used military drones and created the first submarine-launched reconnaissance drone, and has seven innovative vehicles that are part of the Smithsonian Institution&rsquo;s permanent collection in Washington, DC.
Join us today in developing the next generation of small UAS and tactical missile systems that will deliver more actionable intelligence to our customers so they can proceed with certainty &ndash; and succeed.
We offer our employees&nbsp;full medical, dental, vision benefits all&nbsp;beginning&nbsp;day 1 of employment.&nbsp; &nbsp;For more details visit: <a href="http://www.myavbenefits.com">www.myavbenefits.com</a> Paid time&nbsp;off:&nbsp;&nbsp;2 weeks vacation, plus paid company holiday shut down Dec. 25 - Jan 1. 9/80 work schedule: every other Friday off! A fun and collaborative work environment encouraging personal growth and creative innovation;&nbsp;AV is a tech start-up with stability.

Aerovironment

Senior Oracle Apex Developer

About BAE Systems Intelligence & Security BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. As a Full Stack Developer, you will play a critical role in designing, developing, and deploying sophisticated enterprise computing infrastructure, including web applications, network infrastructure, and cloud services.

BAE Systems Plc

Full Stack Developer (Expert)

Work with a diverse group of scientists, bioinformaticians and other developers across the center to implement efficient bioinformatics algorithms. Responsible for the development, implementation, testing, and continued maintenance of NCBI bioinformatics software and information retrieval systems.

Ariadne

NCBI Software Developer (C++, Python)

The scope of this program is to enhance enterprise IT services and solutions to this FBI component to provide best-in-class end-user support and drive improvements in the operations, management, maintenance and integration of services across multiple networks, systems, and applications to enable and enhance mission operations for law enforcement capabilities. ECS is seeking a highly skilled and motivated Software Engineer to provide IT services and support for hardware, IT systems, applications, and operational technologies that support mission critical operations in support of our DOJ FBI Client.

ECS was founded in 2001 by experienced IT professionals with a commitment to quality processes, people and performance. Led by our Chairman, Roy Kapani, and an experienced executive leadership team, ECS provides our customers with solutions and services that support their critical needs and further mission objectives. This commitment has paved the way for expansive growth, year over year.
 
ECS gained market share in 2011 in the Department of Defense and Federal spaces through both organic and acquisition growth. In May, ECS completed its first strategic acquisition with the purchase of OAK Management, Inc., a leading provider of marine environmental services, ship systems engineering, maritime consulting and platform acquisition management. The OAK acquisition kicked off ECS’ intention to add tactical acquisitions as a part of its long term strategy to supplement and expand upon organic growth and to build enterprise value. ECS closed out 2011 with the acquisition of Paradigm Technologies, Inc. The Paradigm transaction added approximately 200 employees to ECS’ existing 900+ employees. Paradigm also added new Defense clients for ECS, including the Missile Defense Agency, the Navy’s Program Executive Officer for Integrated Warfare Systems, the United States Marine Corps, and the U.S. Marshals Service.
 
In 2012, ECS completed the acquisition of iLuMinA Solutions, Inc. iLuMinA brings large-scale Enterprise Resource Planning (ERP) software implementation and infrastructure design and development to ECS’ expanding capabilities.
 
ECS will continue to invest in corporate infrastructure and quality processes as we grow and enhance our ability to offer professional excellence to both our customers and our employees.

ECS Federal LLC

Software Developer Sr

Since 2006, IOMAXIS has advanced the state of Cyber RDT&E by bringing together industry expertise in software, hardware, communications and security, and leveraging decades of operational experience to deliver exceptional value to communities and the critical missions they support. We''re seeking an agile, TS cleared developer familiar with Restful API''s and modern DevOps practices to join us as an integral member of the IOMAXIS team in Quantico, VA where the work is truly dynamic, challenging and meaningful.

Iomaxis LLC

Full Stack Developer - Top Secret Required

You’ll collaborate closely with data scientists, systems engineers, and client stakeholders to evaluate emerging AI technologies, optimize network throughput, and ensure enterprise-grade security and reliability across diverse operational environments. By balancing innovation with architectural rigor, you will solve critical integration bottlenecks, establish MLOps best practices, and scale intelligent systems that empower clients to make data-driven decisions faster and more effectively.

AI Developer and Engineer

FULL_TIME

It requires designing AI-native architectures, orchestrating tool-using agents, and rapidly iterating on prototypes that demonstrate functional, outcome-driven impact. The Johns Hopkins University Applied Physics Laboratory (APL) brings world-class expertise to our nation’s most critical defense, security, space and science challenges.

Johns Hopkins Applied Physics Laboratory

AI-Enabled Cyber Capabilities Developer

[AW]-iCims

You will collaborate with teammates in the planning, design, development, and utilization of data processing systems and determine computer user needs, analyze system capabilities to resolve problems on program intent, output requirements, input data acquisition, programming techniques and controls, design and develop compilers and assemblers, utility programs, and operating systems. As one of the most geographically diverse international defense companies, we deliver a full range of products and services spanning air, land, maritime, space, and cyber, including advanced electronics, intelligence solutions, and dedicated customer support.

ServiceNow Developer

The HRIS Developer will play a vital role in developing, maintaining, and enhancing the Human Resources Information System (HRIS) to ensure it meets the organization’s needs. Greenberg & Larraby, Inc. will never send offer letters of employment unless a thorough interview process has taken place and all other internal processing has taken place.

Greenberg-Larraby, Inc. (GLI)

HRIS Developer

Hris Developer

OTHER

Shall perform engineering tasks for front-end design and development efforts including, but not limited to, creating technical design drawings, mockups, wireframes, and other associated documentation for PMO and stakeholder review, planning and implementing modifications to Graphic User Interfaces (GUIs), constructing and optimizing various UI elements, optimizing system navigation practices and elements, and facilitating operator ease of use for user-facing feature development. Maximus compensation is based on various factors including but not limited to job location, a candidate's education, training, experience, expected quality and quantity of work, required travel (if any), external market and internal value analysis including seniority and merit systems, as well as internal pay alignment.

MAXIMUS provides business services to help governments operate health and human services programs, mostly at the state and national levels. The company's health services segment offers outsourced program management and administrative services,

Maximus

Mid-level Front End Developer

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We are seeking Junior to Senior ServiceNow Engineers to work collaboratively to support a hybrid cloud environment, providing solutions for multi-cloud (AWS, Azure GCC-High, Google Cloud, and Oracle) and on-premises environments while ensuring a secure and reliable operational infrastructure. The company leverages its expertise in data transport solutions, software and systems engineering, and other solutions to deliver critical and innovative capabilities to high-level decision makers that enhance our nation’s security.

Systems Software Developer Jobs in Reston, VA

Java Developer (SME) Leidos

Node.js Developer SME Booz Allen Hamilton

Application Programmer / Developer (Remote) Business System Solutions

Sr. Marklogic Developer Leidos

ETL Java Developer (SME) Leidos

AI Developer And Engineer Booz Allen Hamilton Inc.

Application Developer - Metadata Store Focus BigBear.ai

Advanced Full Stack Developer Rincon Research Corp

Senior Oracle Apex Developer Aerovironment

Full Stack Developer (Expert) BAE Systems Plc

NCBI Software Developer (C++, Python) Ariadne

Software Developer Sr ECS Federal LLC

Full Stack Developer - Top Secret Required Iomaxis LLC

AI Developer and Engineer Booz Allen Hamilton

AI-Enabled Cyber Capabilities Developer Johns Hopkins Applied Physics Laboratory

ServiceNow Developer BAE Systems Plc

HRIS Developer Greenberg-Larraby, Inc. (GLI)

Hris Developer Greenberg-Larraby, Inc. (GLI)

Mid-level Front End Developer Maximus

All Levels- ServiceNow Developer Synergy ECP

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