C# Jobs in Leesburg, VA

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Senior Software Developer (C#.Net) / Remote

Motion Recruitment Partners, LLC

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Remote or Memphis, Tennessee, USA

Full-time

Our client is looking for a Senior Software Developer on a 11-month contract in Memphis, TN. Join over 20,000 employees at this global company specializing in technology-enabled claims and risk management solutions. You will be part of a culture that is constantly recognized for progressive, inclusive employment practices, and be part of a bigger movement to simplify complexities in the areas of workers compensation, liability, property, disability, and absence management. You will work alongsid
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Posted 14 days ago | Updated 7 hours ago

.Net/C# Developer

Collabera LLC

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Remote or Charlotte, North Carolina, USA

Full-time

Hybrid role at NC Salary and Other Compensation: The hourly rate for this position is between $70 75 per hour. Qualifications: 8+ years of experience in software development with a strong focus on .Net and C# technologies. Extensive experience and deep understanding of fixed income markets, including bonds, interest rate derivatives, and other related products. Proven experience in capital markets, with a strong grasp of trading systems, risk management, and financial instruments. Solid underst
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Posted 60+ days ago | Updated moments ago

Senior- Principal Solution Engineer - C#/.NET

American Electric Power

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Remote or Columbus, Ohio, USA

Full-time

Job Posting End Date 07-31-2025 Please note the job posting will close on the day before the posting end date Job Summary Part of a larger team delivering high quality technology solutions to the business. Design, develop and install software solutions. Build high-quality, innovative and fully performing software in compliance with internal architecture, development & design standards & best practices. Design, modify, develop, write, implement and troubleshoot software programming applications.
Posted 8 days ago | Updated 10 hours ago

Commodities Application Developer (C#, React, TypeScript) - AVP - Houston (Hybrid)

Citi

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Remote or Houston, Texas, USA

Full-time

The role is for a C# developer who will be working within a small team on Commodities Marking and Market Discovery Platform used by traders across the regions. We offer the opportunity to grow professionally, learn new technologies and gain business knowledge. Responsibilities: Develop the Platform using C# with an opportunity to learn React during WPF to React migrationWork directly with quants and traders to specify requirements and own deliveries and 3rd line support to provide daily communi
Posted 45 days ago | Updated 10 hours ago

Full Stack Developer (C# / .Net / JS / SQL / AWS)

Cymertek Corporation

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Reston, Virginia, USA

Full-time

Full Stack Developer (C# / .Net / JS / SQL / AWS) LOCATION Reston, VA 20190 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are looking for a skilled and versatile Full Stack Developer to join our team, specializing in C#, .NET, JavaScript, SQL, and AWS. In this role, you will be responsible for building and maintaining robust, scalable applications across both the front-end and back-end. You will collaborate closely with cross-functional te
Posted 60+ days ago | Updated 10 hours ago

Full Stack Developer (C# / .Net / JS / SQL / AWS)

Cymertek Corporation

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Chantilly, Virginia, USA

Full-time

Full Stack Developer (C# / .Net / JS / SQL / AWS) LOCATION Chantilly, VA 20151 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are looking for a skilled and versatile Full Stack Developer to join our team, specializing in C#, .NET, JavaScript, SQL, and AWS. In this role, you will be responsible for building and maintaining robust, scalable applications across both the front-end and back-end. You will collaborate closely with cross-functional
Posted 60+ days ago | Updated 10 hours ago

Senior Software Engineer (C# / .NET)

Copeland

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Remote or Kennesaw, Georgia, USA

Full-time

About Us We are a global climate technologies company engineered for sustainability. We create sustainable and efficient residential, commercial and industrial spaces through HVACR technologies. We protect temperature-sensitive goods throughout the cold chain. And we bring comfort to people globally. Best-in-class engineering, design and manufacturing combined with category-leading brands in compression, controls, software and monitoring solutions result in next-generation climate technology th
Posted 26 days ago | Updated 10 hours ago

Full Stack Developer (C# / .Net / JS / SQL / AWS)

Cymertek Corporation

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Tysons, Virginia, USA

Full-time

Full Stack Developer (C# / .Net / JS / SQL / AWS) LOCATION Tysons, VA 22182 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are looking for a skilled and versatile Full Stack Developer to join our team, specializing in C#, .NET, JavaScript, SQL, and AWS. In this role, you will be responsible for building and maintaining robust, scalable applications across both the front-end and back-end. You will collaborate closely with cross-functional te
Posted 60+ days ago | Updated 10 hours ago

Applications Development Sr Programmer Analyst - C# .Net- AVP - Houston (Hybrid)

Citi

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Remote or Houston, Texas, USA

Full-time

About the Role: The role is for an AVP analyst / developer within the Commodities Technology Front Office Risk team in Houston.Citi are now one of the largest Commodities players in the banking sector, having grown rapidly over the past five years and we have ambitious plans to further develop our Commodities platform. Our technology challenges are therefore fast-moving and varied. The team develops and supports a strategic platform which calculates, manages and stores intra-day and EOD risk dat
Posted 60+ days ago | Updated 10 hours ago

Senior Software Engineering (RPA - Automation Anywhere 360 & C# .NET)

Mastercard

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Remote or O'Fallon, Missouri, USA

Full-time

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest po
Posted 60+ days ago | Updated 10 hours ago

Full Stack Software Developer

DataAnnotation

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Leesburg, Virginia, USA

Full-time

Job DescriptionDataAnnotation is committed to creating quality AI. Join our team to help train AI chatbots while gaining the flexibility of remote work and choosing your own schedule. We are looking for a proficient Full Stack Software Developer to join our team to train our AI chatbots to code. You will work with the chatbots that we are building in order to measure their progress, as well as write and evaluate code. To apply to this role, you will need to be proficient in either Python and/or
Posted 51 days ago | Updated 9 hours ago

Sr Desktop App Developer (.NET) (TS/SCI)

My IT LLC

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Reston, Virginia, USA

Full-time

Job Title: Sr Desktop App Developer (TS/SCI) Location: Reston, VA (Onsite) Type: FTE Exp. Level: Senior / LeadPosition OverviewOur end-client is seeking a Senior Desktop Application Developer to join a high-impact team supporting mission-critical systems in a secure federal environment. This role is ideal for a seasoned developer with a strong background in Windows desktop applications and a passion for secure, high-performance software development.Clearance Required: Active Top Secret (TS) -
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Posted 5 days ago | Updated moments ago

Software Engineer

Cornerstone Defense

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Chantilly, Virginia, USA

Full-time

Location: Chantilly, Virginia Type: Contract Job #3688 Title: Software Engineer Location: Chantilly, VA *Clearance: *Active TS/SCI w/ Polygraph needed to apply * Company Overview: Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is
Posted 49 days ago | Updated 10 hours ago

Full Stack Web Application Developer - Locals only

Bright Intelli LLC

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Vienna, Virginia, USA

Contract

DESCRIPTION Analyze, design, develop, apply, and support complex enterprise projects; Evaluate customer requirements and provide effective solutions; Interface with other offices, consult with and inform user departments on system requirements, and resolve problems and operating difficulties for current and future enhancements to WMATA's systems; Participate in problem resolution related to system design and review; Recommend approval of functional and technical design documents and enactmen
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Posted 20 days ago

Data Analyst (part-time work from home)

DataAnnotation

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Bethesda, Maryland, USA

Full-time

Job DescriptionDataAnnotation is committed to creating quality AI. Join our team to help train AI chatbots while gaining the flexibility of remote work and choosing your own schedule. We are looking for a proficient Data Analyst (part-time work from home) to join our team to train our AI chatbots to code. You will work with the chatbots that we are building in order to measure their progress, as well as write and evaluate code. To apply to this role, you will need to be proficient in either Pyth
Posted 4 days ago | Updated 9 hours ago

Software Engineer II - CTJ - Poly

Microsoft Corporation

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Reston, Virginia, USA

Full-time

Security represents one of the most critical priorities for our customers in a world shaped by digital threats, regulatory complexity, and evolving technology. Microsoft Security is committed to making the world safer for everyone. We aim to redefine security by empowering every individual, organization, and developer with a comprehensive, simplified security cloud. As part of this mission, we're looking for a Software Engineer II to join our team and help build secure, scalable solutions that p
Posted 10 hours ago

Systems Engineer II

Sierra Nevada Corporation

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Remote or Herndon, Virginia, USA

Full-time

Do you enjoy developing new products and services? Join us! Our Software Engineers work in an agile, collective environment. You will be using your skills and expertise to define, design, develop, test, certify and improve cutting-edge software products. These cover a very wide range from advanced mission payloads and electronic systems through highly integrated aircraft to orbital and space exploration systems. You'll perform coding, debugging, testing, and troubleshooting of systems and softwa
Posted 7 days ago | Updated 10 hours ago

UI Designer (part-time work from home)

DataAnnotation

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Chevy Chase, Maryland, USA

Full-time

Job DescriptionDataAnnotation is committed to creating quality AI. Join our team to help train AI chatbots while gaining the flexibility of remote work and choosing your own schedule. We are looking for a proficient UI Designer (part-time work from home) to join our team to train our AI chatbots to code. You will work with the chatbots that we are building in order to measure their progress, as well as write and evaluate code. To apply to this role, you will need to be proficient in either Pytho
Posted 4 days ago | Updated 9 hours ago

Software Engineer - CTJ - Poly

Microsoft Corporation

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Reston, Virginia, USA

Full-time

Security represents the most critical priorities for our customers in a world awash in digital threats, regulatory scrutiny, and estate complexity. Microsoft Security aspires to make the world a safer place for all. We want to reshape security and empower every user, customer, and developer with a security cloud that protects them with end to end, simplified solutions. The Microsoft Security organization accelerates Microsoft's mission and bold ambitions to ensure that our company and industry i
Posted 1 day ago | Updated 10 hours ago

Software Engineer

Softthink Solutions, Inc.

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Leesburg, Virginia, USA

Full-time

Software Engineer - Master s with two years experience. Softthink Solutions Inc seeking Software Engineers (Work in Leesburg, VA & Various unanticipated locations throughout Washington DC MSA) multi openings to Develop Azure and .NET applications. analyze, design, and evaluate user requirements. Conduct feasibility studies for client-server, web-based, message-based, cloud-based, and data warehousing applications /solutions using technologies /tools listed here to perform job duties such as Powe
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Posted 27 days ago | Updated 27 days ago