c# Jobs in District of Columbia

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Software Development Intern - Summer 2025

CACI International, Inc.

•

Chantilly, Virginia, USA

Part-time

Software Development Intern - Summer 2025 Job Category: Intern/Co-op Time Type: Part time Minimum Clearance Required to Start: None Employee Type: Part-Time On-Call Percentage of Travel Required: None Type of Travel: None * * * The Opportunity: CACI is seeking a software development intern for Summer 2025 on-site in our Oklahoma City, OK or Chantilly, VA office. The position follows a hybrid work model, with remote work on Mondays and Fridays, and in-office presence required on Tuesdays
Posted 37 days ago | Updated 29 days ago

.Net Developer

Global Channel Management, Inc.

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Washington, District of Columbia, USA

Full-time

.Net Developer needs 10+ years' experience .Net Developer requires: Hybrid - Owing Mills MD - 2 days/Week 10+ Years Experience in IT. .NET development experience --Hands on experience with a Cloud provider such as Azure or AWS. --Development Experience in C#, Javascript, React, SQL Server, Postgres. Bachelor's degree in a technical field such as computer science, computer engineering or related field required Development experience in needed language or technology (e.g. - C#, C++, HTML) Hands on
Posted 60+ days ago | Updated 5 days ago

Senior Software Developer

Amentum

•

Fort Belvoir, Virginia, USA

Full-time

Senior Software Developer This position is located at Ft Belvoir VA at the Defense Threat Reduction Agency as part of Advanced Red Cyber Team Operations. Must have 3+ years as a software developer. Proficient in C and C# and BOFs. Should have 1+ years' experience in offensive capability development for Windows environments. Should have 1+ years' experience working in an agile/scrum environment. Special requirements: - Must pass the Defense Threat Reduction Agency (DTRA) Cyber Assessment Red Te
Posted 60+ days ago | Updated 29 days ago

Senior Software Engineer - Apex/.NET (Top Secret Clearance)

General Dynamics

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Washington, District of Columbia, USA

Full-time

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret Clearance Level Must Be Able to Obtain: Top Secret Public Trust/Other Required: None Job Family: Software Engineering Job Qualifications: Skills: Software Engineering, Software Product Engineering, Software Test Engineering Certifications: None Experience: 10 + years of related experience ship Required: Yes Job Description: Senior Software Engineer Transform technology into opportunity as a Senior Software En
Posted 3 days ago | Updated 12 hours ago

C#/Javascript/SQL Server Fullstack Developer

Case Interactive

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Remote

Full-time

Title: Software Application Developer Job Description: We are seeking a talented and motivated Software Developer to join our fully remote team. This role involves working with our proprietary full-stack in-house development platform and low-code language to build and maintain database-driven web applications. While experience with our in-house platform and language is not expected, candidates should have a strong background in UI development and database architecture. As part of an agile develo
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Posted 60+ days ago | Updated 5 days ago

Lead Software Engineer

Costar Group

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Arlington, Virginia, USA

Full-time

Lead Software Engineer Job Description Overview CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index and the NASDAQ 100, CoStar Group is on a mission to digitize the world's real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives. We have been living and breathing the world of real estate information and
Posted 18 days ago | Updated 11 hours ago

Sr. Software Development Engineer - National Imagery

Esri

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Vienna, Virginia, USA

Full-time

Overview Apply your software development education and experience as a senior member of our software development team. You will build and release Esri software technologies focused on the intersection between GIS, photogrammetry and remote sensing for the defense and intelligence communities. In this role, you will collaborate with a talented team of software developers and product engineers to create, build, test, and release advanced software technologies focused on imagery users. This is an
Posted 60+ days ago | Updated 12 hours ago

Senior.Net Developer

Cayuse Shared Services

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Arlington, Virginia, USA

Full-time

Overview The .Net Developer is responsible for full stack development on the Windows platform with experience in Project Management and Agile methodologies. This position involves interacting with project stakeholders and designing solutions to meet their needs. All duties and responsibilities performed in accordance with the Core Values of Cayuse. Responsibilities Interacting with project stakeholders and designing solutions to meet their needs.Ability to Manage and Facilitate the Agile proc
Posted 7 days ago | Updated 8 hours ago

SHAREPOINT ENGINEER

ManTech

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Springfield, Virginia, USA

Full-time

ManTech seeks a motivated, career and customer-oriented SharePoint Engineer in Springfield, VA. Responsibilities include, but are not limited to: The responsibilities will include designing, developing, and deploying solutions to improve organizational knowledge sharing and awareness. Work with a small team committed to supporting our DoD customer. Responsible for engineering new and maintaining current IT tool-sets relevant to the environment. Support content design of Microsoft SharePoint 201
Posted 40 days ago | Updated 1 day ago

Manager, Software Engineering

Costar Group

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Arlington, Virginia, USA

Full-time

Manager, Software Engineering Job Description CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index and the NASDAQ 100, CoStar Group is on a mission to digitize the world's real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives. We have been living and breathing the world of real estate information and
Posted 20 days ago | Updated 11 hours ago

UiPath /RPA Developers / Fort Belvoir, VA

General Dynamics

•

Fort Belvoir, Virginia, USA

Full-time

Type of Requisition: Pipeline Clearance Level Must Currently Possess: Top Secret/SCI Clearance Level Must Be Able to Obtain: Top Secret/SCI Public Trust/Other Required: None Job Family: Software Development Job Qualifications: Skills: Agile Methodology, Robotic Process Automation, Software Development Life Cycle (SDLC), UiPath (Platform) Certifications: Security+ - CompTIA Experience: 3 + years of related experience ship Required: Yes Job Description: Deliver simple solutions to complex
Posted 57 days ago | Updated 11 hours ago

QA Automation Engineer

NTT DATA Americas, Inc

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Remote or Carlsbad, California, USA

Contract

Key Skills: Playwright and C#, leveraging BDD frameworks like SpecFlow and Cucumber to align with requirements.NTT DATA's Client is seeking a QA Automation Engineer with 5+ years of experience* Proficient in designing, executing, and maintaining test cases and test plans. * Design, develop, and maintain automated test scripts using Playwright and C#, leveraging BDD frameworks like SpecFlow and Cucumber to align with requirements. * Support API testing, with hands-on experience using Swagger/Open
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Posted 19 days ago | Updated 6 hours ago

Senior Offensive Security Engineer

Costar Group

•

Arlington, Virginia, USA

Full-time

Senior Offensive Security Engineer Job Description Offensive Security Engineer Overview CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index and the NASDAQ 100, CoStar Group is on a mission to digitize the world's real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives. We have been living and breathing
Posted 60+ days ago | Updated 11 hours ago

Software Engineer, Lead

American Systems Corporation

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Washington, District of Columbia, USA

Full-time

Overview AMERICAN SYSTEMS is an employee-owned federal government contractor supporting national priority programs through our strategic solutions in the areas of Information Technology, Test & Evaluation, Program Mission Support, Engineering & Analysis, and Training. Responsibilities THIS POSITION INCLUDES A $5,000 SIGN-ON BONUS! As a Senior Software Engineer with AMERICAN SYSTEMS you will have the opportunity to do the following: Work across cloud and on-premises environments using the lat
Posted 1 day ago | Updated 12 hours ago

Software Engineer, TS/SCI with Full Scope Polygraph Security Clearance Required - G

Next Step Systems

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Severna Park, Maryland, USA

Full-time

Software Engineer, TS/SCI with Full Scope Polygraph Security Clearance Required, Severna Park, MD The Software Engineer will join a team providing Life Cycle Sustainment (LCS) and modernization activities for commercial and custom-developed education, learning, and training applications supporting the Government enterprise. The candidate must be a strong senior developer that is comfortable digging into the products and developing a subject matter expertise, tackling challenges sometimes withou
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Posted 15 days ago | Updated 20 hours ago

Software Engineer | Remote | Contract

Walker Healthforce

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Remote

Contract

Software Engineer | 5-7 years experience | Remote | Contract Walker Healthforce is seeking a Software Engineer with 5-7 years of experience to support a healthcare client. This is a 6-month contract opportunity. START DATE: 6/2/2025 CORE REQUIREMENTS: 5-7 years experience as a Software Engineer Experience with .Net technologies Experience with ASP.Net, .Net Core, C#, JavaScript, VB Script, HTML, CSS, SSIS, and SQL ADDITIONAL REQUIREMENTS: Must hold a valid government clearance JOB RESPONSIBIL
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Posted 12 hours ago

Software Developer Cyber - SWE 3

Lockheed Martin Corporation

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Maryland, USA

Full-time

Job Description This position may be eligible for a $25K sign on bonus for external hires! What We're Doing: Lockheed Martin, Cyber & Intelligence invites you to step up to one of today's most daunting challenges: the use of advanced electronics to undermine our way of life. You'll develop innovative offensive cyber capabilities that help protect the nation and the world. Cyber Lockheed Martin Who we are: Are you driven by the thrill of outsmarting even the most advanced security systems and
Posted 37 days ago | Updated 12 hours ago

Lead, Systems Integration Engineering (UAV)

Harris Corporation

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Ashburn, Virginia, USA

Full-time

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers' mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris Technologie
Posted 1 day ago | Updated 12 hours ago

Senior Software Engineer | Remote | Contract

Walker Healthforce

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Remote

Contract

Senior Software Engineer | 8+ years experience | Remote | Contract Walker Healthforce is seeking a Senior Software Engineer with 5-7 years of experience to support a healthcare client. This is a 6-month contract opportunity. START DATE: 6/2/2025 CORE REQUIREMENTS: 8+ years experience as a Software Engineer Experience with .Net technologies Experience with ASP.Net, .Net Core, C#, JavaScript, VB Script, HTML, CSS, SSIS, and SQL ADDITIONAL REQUIREMENTS: Must hold a valid government clearance JOB
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Posted 12 hours ago

Power Apps Architect

Constellation Software Engineering, Corp.

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Washington, District of Columbia, USA

Full-time

Dynamics 365/Power Apps Architect **Immediate Opportunity** **Remote work** CSEngineering is looking to add a Dynamics 365/Power App Developer to our growing team! JOB RESPONSIBILITIES Responsible for all SDLC activities, code review, mentoring team, resource planning and providing. Ability to establish priorities and work independently. Project Scheduling, Monitoring, Risk analysis and mitigation. REQUIRED QUALIFICATIONS Security Clearance: Eligible for a Secret Clearance. A minimum of a bache
Posted 6 days ago | Updated 8 hours ago