Software Developer jobs in Herndon

Leidos

This Department of War enterprise data and analytics program delivers mission-critical capabilities that enable leaders across the Department to make faster, better-informed decisions using trusted data at scale. Leidos Digital Modernization sector is seeking an experienced SME Software Developer to

Active Top Secret (TS/SCI) Clearance With Polygraph Is Required. Visionist has an exciting new, fully FUNDED opportunity for a Junior Full-Stack Software Developer on our largest PRIME contract. Our team of Analysts and Engineers is motivated by the direct impact on the mission, crafting specialized

Job Description The position involves collaborating with a team of software and test engineers to update and migrate legacy software, used for Naval Ship Weapons Direction Systems, into a new hardware environment as part of a naval system mid-life modernization effort. The program for hardware moder

Modern Software Developer, Senior The Opportunity : As a full stack developer, you can resolve a problem with a complete end-to-end solution in a fast, agile environment. If you’re looking for the chance to not just develop software, but to create a system that will make a difference, we need you on

Eliassen Group

Sr. Software Developer III Washington dc, DC Type: Permanent Category: Development Industry: Government Reference ID: JN -032026-106000 Date Posted: 03/16/2026 Shortcut: http://careers.eliassen.com/yrJiJ3 Description Recommended Jobs Description: Onsite in Washington, DC The organization seeks a Sr.

Position Description: CGI Federal is seeking a highly skilled and motivated Backend Developer to join our innovative team. As a Backend Developer, you will be responsible for designing, developing, and maintaining robust and scalable backend systems. You will work closely with front end developers,

CAREERS You can have the ultimate choice at Prosoft Associates - a worldwide IT services firm. We seek Software engineers, scientists, and IT technical staff to join On-site, Offsite and Offshore development teams capable of helping our clients provide diverse solutions required to improve performan

fusionSpan is a fast-growing multinational information technology services company, and we are seeking a Java Developer to join at our Headquarters in Rockville, MD. This position is open to part-time internship during the semester, and can be full time internship during the summer. This position wi

Software Developer (Back End) Category: Software Development/ Engineering Main location: United States, Virginia, Fairfax Position ID: J0426-0928 Employment Type: Full Time Position Description: CGI Federal is seeking a highly skilled and motivated Backend Developer to join our innovative team. As a

Job Title: Senior Software Developer (Python – Financial Accounting) Location: McLean, VA (100% Onsite) Duration: 2–3 Months Role Overview We are seeking an experienced Senior Software Developer with strong expertise in Python and financial accounting systems to support enterprise forecasting platfo

Job Description The position involves collaborating with a team of software and test engineers to update and migrate legacy software, used for Naval Ship Weapons Direction Systems, into a new hardware environment as part of a naval system mid-life modernization effort. The program for hardware moder

As a Sr. Software Developer I (.NET / C#) , you'll work on a portfolio of mission-critical applications that support the highest levels of the federal government. We know that you can't have great technology services without amazing people. At MetroStar, we are obsessed withour people and have led a

About the role We are looking for a talented Cloud Software Developer to join our remote team. You will work closely with application developers to transition legacy products and applications to the cloud and perform CI/CD using AWS cloud services. You should possess experience implementing, monitor

Role: Senior Software Development (Python) Location: McLean VA- Onsite Responsibilities Refactor and modernize existing components of the financial accounting and forecasting application to improve maintainability, performance, and scalability. Develop and enhance core forecasting engine features to

As a Sr. Software Developer I (.NET / C#) , you'll work on a portfolio of mission-critical applications that support the highest levels of the federal government. We know that you can’t have great technology services without amazing people. At MetroStar, we are obsessed with our people and have led

As a Sr. Software Developer III (.NET / C#) , you will design, build, and deliver secure, reliable software solutions for a highly visible, mission-critical customer supporting national-level operations. You will be part of a program focused on rapidly delivering high-quality software while maintain

Amentum

Purpose and Impact: The Geospatial Enterprise Open Data Store (GEODS) contract provides integration, design, development, and sustainment for data services in support of the Federal Government. Developers on GEODS routinely design and implement new custom features that solve unique problems, optimiz

This posting is for a contract assignment and is not a full-time employment offer with Boeing. Candidates selected for roles will be employed as contract workers through a Boeing approved 3rd party for the duration of the specified project. The Boeing Company is seeking a Full-Stack Software Enginee

This posting is for a contract assignment and is not a full-time employment offer with Boeing. Candidates selected for roles will be employed as contract workers through a Boeing approved 3rd party for the duration of the specified project. The Boeing Company is currently seeking an Experienced Full

We are seeking a Junior Software Engineer (Web Developer/Programmer) to support the design, development, and maintenance of high-quality websites and web applications. This role works closely with designers, developers, and content teams to deliver accessible, usable, and standards-compliant web sol