C# jobs in Fairfax, VA

Senior Cloud Software Engineer/Architect

Gainesville, Virginia

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Today

About the Organization Now is a great time to join Redhorse Corporation. We are a solution-driven company delivering data insights and technology solutions to customers with missions critical to U.S. national interests. We're looking for thoughtful, skilled professionals who thrive as trusted partners building technology-agnostic solutions and want to apply their talents supporting customers with difficult and important mission sets. About the Role Redhorse transforms the way government uses d

Sponsored

Full-time

Full Stack Software Developer with C#/.NET Expertise

McLean, Virginia

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Today

Job Title: Full Stack Software Developer with C#/.NET Expertise Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Local * * * Bring your expertise and sense of urgency to a team performing mission critical work. Within this team and supporting our product, you will have a direct hand in shaping requirements and expectations for current and fut

Full-time

USD 90,300.00 - 189,600.00 per year

C#/.Net Software Engineer

Hybrid in North Bethesda, Maryland

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13d ago

C#/.Net Software Engineer Rockville, MD hybrid (2 days a week onsite) $105-110K This is an engineering role that works as part of the software engineering team towards the development and deployment of enterprise and informatics software systems to support cancer clinical trials and research. The role provides a strong career growth opportunity in an innovative technology environment working in one of our nation's premier research organizations. Responsibilities: Manage individual task prior

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Full-time

Depends on Experience

Applications Developer

Tysons, Virginia

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7d ago

Job Description: Position Title: Applications Developer City: Tysons (McLean) State: VA Country: US Type: 4 (Exempt, Bargaining Unit 1 (EB) # of Openings: 1 Category: Information Technology & Services - Applications Developer Company Name: Air Line Pilots Association, Int'l., Tysons (McLean), Virginia, United States Description: Applications Developer The Air Line Pilots Association, International (ALPA), the largest airline pilot union in the world and the largest non-governmental avi

Full-time

$80,884 - $139,923

.NET / C# and Blazor Consultant

Remote

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Today

Position: .NET / C# and Blazor Consultant Location: Remote (USA) Employment Type: Full-Time Experience Required: 4 Years to 7+ years Work Authorization: Must have Valid USA Work permit Annual Compensation: $75,000$90,000, depending on qualifications and experience. *Benefits:* Health insurance: Medical, dental, and vision. 401(k) retirement plan (no employer matching contribution). Paid vacation/PTO, subject to the employer's policy. Paid sick leave in accordance with applicable Washington State

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Contract

Depends on Experience

.Net Software Engineer

Vienna, Virginia

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11d ago

Position: .Net Fullstack Developer Duration: 12 Months with possible extension Location: Vienna, VA Position Summary We are seeking a Senior Full Stack Engineer to lead the design, development, and delivery of scalable enterprise applications across frontend, backend, APIs, and data platforms. This role requires a hands-on technical leader who can architect complex systems, mentor engineers, drive best practices, and deliver high-quality solutions using .NET, React/Angular, and SQL technologies

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Full-time

Depends on Experience

Lead .Net Full Stack Developer

McLean, Virginia

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15d ago

Job Summary 7+ years of software development experience. Strong coding experience in any of these languages (C# and .Net), Unit testing, REST API designStrong React / TypeScript / Next.js 15 App Router, RTK Query, Tailwind CSS, component library patternsExperience integrating with ERP systems (Microsoft Dynamics NAV / Business Central strongly preferred)Proven experience designing real-time systems (SignalR, WebSockets, or equivalent)OpenAPI/Swagger specification authoring and API contract-first

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Contract

$60 - $70

Full Stack Developer (Entry Level)

Sterling, Virginia

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Today

ASSYST is seeking a motivated Full Stack Developer (Entry Level) to join our growing engineering team in Sterling, VA (Onsite). This role offers an excellent opportunity to gain hands-on experience building enterprise-grade applications in an Agile environment. Responsibilities: Develop and maintain full-stack web applications across both front-end and back-end systems.Write clean, maintainable code and build reusable application components and APIs.Design responsive user interfaces using modern

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Full-time

Depends on Experience

Senior Fullstack Developer (C#, AWS, Angular)

Remote or Hybrid in Cleveland, Ohio

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Today

Precision is seeking a Senior Full Stack Developer for a contract position supporting our Fortune 100 client. This fully remote role requires work during Eastern Time business hours and focuses on building and supporting software across the UI, backend, APIs, databases, and cloud. You will develop with C#/.NET and Angular while designing APIs and microservices. Strong AWS experience is essential, including DynamoDB, SQS, SNS, S3, Lambda, and Terraform. The role also includes technical documentat

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Contract

DOE

Software Development Engineer (Only W2 )

Hybrid in McLean, Virginia

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14d ago

About the Role We are looking for a Software Development Engineer to join our team on a major internal development project. In this role, you will focus heavily on backend service development using Go (Golang) and cloud deployments on AWS. Key Requirements (Must-Haves) Programming Experience: 3+ years of experience developing backend services (e.g., REST API services).Preference: Strong hands-on experience with Go (Golang).Alternative: Candidates with strong experience in Java or C# will be con

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Contract

Senior .Net developer (Secret Clearance)

Hybrid in Stafford, Virginia

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5d ago

.NET Web Application Developer FBI Virtual Academy Mostly remote 1 day/week onsite in Quantico, VA Secret Clearance required Must be able to obtain Top Secret RESPONSIBILITIES: Design and Develop .NET based web application functionality using C# and MVC Build web applications using JavaScript, JQuery and other client-side technologies such as Vue JS Design and develop applications using agile development and SCRUM processes Research problems discovered by QC or product support and provide

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Contract

Depends on Experience

Senior Fullstack Developer (C#, AWS, Angular)

Remote or Hybrid in Cleveland, Ohio

•

Today

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Contract

DOE

.NET Full Stack Engineer

Vienna, Virginia

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12d ago

Hi, We currently have an exciting opportunity for a .NET Full Stack Engineer with one of our direct clients. This is an onsite position based in Vienna, VA (Onsite).Please let me know if you d be interested in discussing this opportunity further. Job Title: .NET Full Stack Engineer Job Type: Contract Location: Vienna, VA(Onsite) Job Summary: We are looking for an experienced Senior.NET Full Stack Engineer with a strong background in designing, developing, and deploying enterprise-grade applicat

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Third Party, Contract

Depends on Experience

Senior Software Engineer - .NET, C#, WPF

Remote

•

Today

Job Description A Global Software Engineering company is seeking a Senior Software Engineer to develop and extend business applications for enterprise clients while providing technical leadership and mentorship to the development team. Working within an Agile Scrum environment, you will build and enhance applications across desktop and mobile platforms, including WPF, UWP, iOS, and Android. This role combines hands-on software development with project ownership, client engagement, and solution

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Full-time

$115000 - $130000

Senior Programmer (C# .Net)

Remote or Hybrid in Los Angeles, California

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Today

Job Title: Senior C# .NET Developer Remote Duration: 12 Months Skills Required The Senior Programmer will possess knowledge and experience in applications software development principles and methods sufficient to participate in the design, development, testing and implementation of new or modified applications software; operating systems installation and configuration procedures; organization's operational environment; software design principles, methods and approaches; principles, methods and

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Contract, Third Party

Jr. Software Developer C#

Remote

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4d ago

Software Developer About The Opportunity The Intersect Group is partnering with a respected organization in the consumer finance industry that is committed to delivering innovative technology solutions that improve business operations and customer experiences. The company values collaboration, continuous learning, and technical excellence while fostering an environment where employees can develop their skills and make a meaningful impact. This is an opportunity to join a stable, technology drive

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Contract

Depends on Experience

Full Stack Developer / C# .NET / Vue / Azure / Remote

Remote

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Today

A leading food services and facilities management organization is seeking a Full Stack Developer for a remote contract opportunity. This role will support application modernization initiatives and the migration of enterprise applications to Microsoft Azure, utilizing technologies including C#, .NET, Vue/Nuxt, SQL, and RESTful APIs to build and enhance business-critical solutions. What sets this opportunity apart is the chance to work on modernizing and rebuilding applications in a collaborative

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Contract

$45 - $75

Jr - Mid level C# .Net Full Stack developer IOT

Remote

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Today

Jr - Mid level C# .Net Full Stack developer IOT Client is unable to sponsor visa at this time, so looking for USC. Required 26 years full-stack development shipping production software React / TypeScript + .NET C# or Python backend IoT protocol experience (MQTT, AMQP) or edge software integration Software packaging: installers, containers, or update agents AI tools in daily dev (Cursor, Copilot, Claude Code) CI/CD familiarity (GitHub Actions or equivalent) Nice to Have Medical device soft

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Contract

Depends on Experience

Software Engineer I (C#/.NET)

Arlington, Virginia

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Today

Software Engineer I (C#/.NET) 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, 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 online mar

Full-time

USD 108,000.00 - 154,000.00 per year

Senior Software Engineer (C#/.NET)

Arlington, Virginia

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Today

Senior Software Engineer (C#/.NET) 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, 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 onlin

Full-time

USD 143,000.00 - 187,000.00 per year

Software Engineering Manager - C# & Oracle Development

Fort Belvoir, Virginia

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Today

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret Clearance Level Must Be Able to Obtain: Top Secret/SCI Public Trust/Other Required: None Job Family: Software Engineering Job Qualifications: Skills: Collaboration, Design, System Administration Certifications: None Experience: 8 + years of related experience ship Required: Yes Job Description: Software Engineering Manager - for C# and Oracle Development The Software Engineering Manager leads a team of C#/.N

Full-time

USD 161,500.00 - 218,500.00 per year

C# jobs in Fairfax, VA, USA