C# jobs in Fairfax, VA

Hybrid in Merrifield, Virginia

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14d ago

Mid-Level Software Engineer C/C++ or C# Software Engineer Direct-Hire Location: Merrifield, VA 4 days on-site/ 1 day remote Annual Salary Range: $95,000 to $105,000 plus benefits Federal End Customer: ship, eligibility for a Public Trust clearance required Overview We are seeking a talented and motivated Mid-Level Software Engineer to join our clients growing development team. The ideal candidate will have a strong foundation in software engineering principles, hands-on development experience,

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Full-time

$105000

Senior Software Engineer C#

Hybrid in Merrifield, Virginia

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14d ago

Senior Software Engineer C/C++ or C# Software Engineer Direct-Hire Location: Merrifield, VA 4 days on-site/ 1 day remote Annual Salary Range: $105,000 to $120,000 plus benefits Federal End Customer: ship, eligibility for a Public Trust clearance required Overview We are seeking an experienced Senior Software Engineer to provide technical leadership and drive the design, development, and delivery of mission-critical software solutions. The ideal candidate will possess advanced software engineer

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Full-time

$120000

VB.NET/C# Developer

Hybrid in Rockville, Maryland

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5d ago

Role - Computer Programmer, (Junior) Contract Type W2 Contract length Longterm Job Location Rockville MD Onsite and some telework allowed The Application Integration Developer will work with the IT Division to enhance and expand functionality for data integrations. The selected candidate will join an existing team of Windows Application Developers using C# and VB.net within Windows Forms and WCF web services and is expected to have experience in those technologies. Duties: Participation in

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Full-time

Depends on Experience

.Net Software Engineer

Vienna, Virginia

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Today

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

C#/Duck Creek Developer (Field Engineer)

Remote or Hybrid

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Today

Precision is seeking THREE (3) Duck Creek/C# Developers for a contract position with our Fortune 100 client. This fully remote role supports software applications and platform enhancements using Duck Creek Policy, C# .NET, Kafka, and API development. You will analyze requirements, create programming specifications, develop and test code, support production applications, and maintain technical documentation. The role requires strong troubleshooting, problem-solving, organization, and communicatio

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Contract

DOE

Senior GenTax Developer - C#/PostgreSQL - REMOTE

Remote

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Today

Job Description: No Corp to Corp, Only W2/ 1099 Resumes will be considered Work Location: 100% Remote (Manager is willing to consider candidates in Eastern, Central, Mountain, and Pacific Time Zones) The candidate will be responsible for analysis, design, coding, testing, and documentation. The candidate will code enhancements and develop required fixes to production problems using the functional and technical programming standards of the GenTax system. The tool set will include C#, PostgreSQL,

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Contract

Depends on Experience

Lead .Net Full Stack Developer

McLean, Virginia

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Today

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

Mainframe Consultant With C#.Net Exp

Remote

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Today

Job Title : Mainframe Consultant With C# .Net Experience Needed Location : 100% Remote role Duration : 12+ Month Contract Job Summary : The Client islooking for a Mainframe Developer with strong C#.NET coding experience and excellent client-facing and communication skills. Mandatory Skills: 8 + Years of Mainframe development experience (COBOL, JCL, CICS, DB2, VSAM).Strong hands-on C#.NET development experience for application integration and modernization.Experience integrating C#.NET applicati

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Contract

Depends on Experience

Sr. Software Systems Engineer (C#/.NET Developer)

Remote

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Today

Job ID: 2616718 Location: Remote Work, TX, US Date Posted: 2026-09-10 Category: Engineering and Sciences Subcategory: Systems Engineer Schedule: Full-Time Shift: Day Job Travel: No Minimum Clearance Required: None Clearance Level Must Be Able to Obtain: Public Trust Potential for Remote Work: ORA_REMOTE Description SAIC is searching for a motivated, career and customer-oriented Sr. Software Engineer (C#/.NET Developer) who will work across EDI transaction processing, backend API develo

Full-time

USD 80,001.00 - 120,000.00 per year

Mainframe with C#

Remote

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4d ago

Role :- Mainframe Consultant with .Net C# Location: | Remote Contract OpportunityLooking for a strong Mainframe Developer with:Hands-on C# coding experience Strong Mainframe experience Excellent communication skills Ability to work independently in a remote environment

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Third Party, Contract

Depends on Experience

C#.NET Developer with Trading And Capital Market Exp

Remote

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Today

JOB DESCRIPTION: Please apply only if you have Investment banking/Capital market experience. Role: C#.NET Developer with investment banking and Capital Market exp.Location: NY(Remote)Job Type: W2 / Fulltime Client is looking for a reliable full stack Dot Net developer ASAP.Wealth Management & Capital Market (Trading, Equities, , Portfolio) Exp. Must.SQL, C#, .NET, Full stack developer with 8+ years of experienceProficiency in C#, .NET framework, and object-oriented programming principles.Experie

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Full-time

Depends on Experience

Senior .Net Application Developer (Secret clearance)

Reston, Virginia

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20d ago

Senior .Net Developer Arlington, VA or Merrifield, VA - ONSITE Secret Clearance is required to start Must be able to obtain DEA clearance 2-6 month process Responsibilities: Works in a collaborative team environment to develop and enhance code for applications built within the Concorde framework, ensuring high-quality and efficient solutions. Demonstrates strong expertise in Agile development methodologies through daily activities, including sprint participation, task execution, and adherenc

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Contract

Depends on Experience

Lead .Net Developer (Secret clearance)

Reston, Virginia

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20d ago

Lead .Net Developer Arlington, VA or Merrifield, VA - ONSITE Secret Clearance is required to start Must be able to obtain DEA clearance 2-6 month process Responsibilities: Lead a team of 5-7 developers in support of the mission with an ability to guide them on technical decisions, best practices, and team efficiencies Lead technical planning meetings Conduct peer code reviews and final code reviews Demonstrate soft skills in terms of professionalism, conduct and execution in a client-facin

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Contract

Depends on Experience

C#/VB.NET Developer

Remote or Hybrid

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Today

Our Fortune 100 client is seeking a Senior IT Software Developer for a 12-month contract assignment. This remote role focuses on developing software solutions, with approximately 80% back-end development and 20% front-end development. The developer will analyze requirements, write and modify complex code, test applications, support production systems, and maintain technical documentation. The role requires strong experience with VB.NET, C#, SQL Server, integration and reporting services, SQL Alw

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Contract

DOE

Lead Dotnet Developer - Remote (Must have: Google Cloud Platform, C#, ASP.NET, Web API) Direct client - 12+ months contract...

Remote

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Today

Must have: Technical Lead / .NET Lead, C#, ASP.NET, and ASP.NET Web API.Google Cloud Platform (Google Cloud Platform)services, specifically -Google Cloud Run-Google Cloud Run Jobs-Google Pub/Sub. Strong hands on coding, Familiarity with CI/CD pipelines, DevOps practices and modern software engineering methodologies and cloud deployment strategies. Leading a scrum team Requirements 10+ years of experience in software development with strong expertise in the Microsoft technology stack.Proven expe

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Contract

Depends on Experience

Sr. Software Systems Engineer (C#/.NET Developer)

Remote

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Today

Job ID: 2616245 Location: Remote Work, TX, US Date Posted: 2026-08-28 Category: Engineering and Sciences Subcategory: Systems Engineer Schedule: Full-Time Shift: Day Job Travel: No Minimum Clearance Required: None Clearance Level Must Be Able to Obtain: Public Trust Potential for Remote Work: ORA_REMOTE Description SAIC is searching for a motivated, career and customer-oriented Sr. Software Engineer (C#/.NET Developer) who will work across EDI transaction processing, backend API develo

Full-time

USD 80,001.00 - 120,000.00 per year

Sr. Software Engineer (C# .NET/Azure/React/API

Remote

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29d ago

Title: Sr. Software Engineer (C# .NET/Azure, React, APIs, Kafka and Kubernetes) Location: REMOTE Duration: one year with possible extensions Compensation: 70-80/hr Work Requirements: , Holders or Authorized to Work in the US Job Description: Seeing a motivated Software Development professional passionate about NET/Azure development and integrations. You excel at software development and have experience in .NET, specifically C#, React, API, and Eventing. You are optimistic, proactive, analytica

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Contract, Third Party

$65 - $70

Software Engineer - C#/ BCS

Reston, Virginia

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Today

Job Summary: Securiport LLC is a U.S.-based company headquartered in Reston, VA, specializing in the design and implementation of advanced border security solutions, including passenger biometric recognition, immigration processing, and intelligent information management systems. Our technology enables governments worldwide to enhance security, screening, and operational efficiency. We are seeking a Software Engineer (3-5 years experience) to join our Product Development team. In this role, you

Full-time

USD 110,000.00 - 135,000.00 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 online

Full-time

USD 143,000.00 - 187,000.00 per year

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# jobs in Fairfax, VA, USA