C# Jobs in Fairfax, VA

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Senior .NET Developer

Kforce Technology Staffing

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Remote or Boston, Massachusetts, USA

Contract

RESPONSIBILITIES: Kforce has a client in Boston, MA that is seeking a seasoned Senior .NET Developer with 8+ years of experience in full-stack development. This role involves designing and building scalable web applications and APIs, working across front-end, back-end, and database layers in a cross-functional team. Responsibilities: * Senior .NET Developer will develop and maintain web applications and services * Collaborate on architecture, design, and code reviews * Translate business requir
Posted 14 hours ago | Updated 3 hours ago

Prophet 21 (P21) Administrator - 100% Remote

Recruit Professional Services

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US

Full-time

Prophet 21 (P21) Administrator - 100% Remote Responsibilities: Manage and maintain the Epicor Prophet 21 ERP system, including upgrades, patches, and configurations. Create and manage user accounts, roles, and permissions. Provide end-user support and training for the P21 system. Troubleshoot and resolve technical and functional issues promptly. Configure workflows, dashboards, and reports to meet business requirements. Develop and maintain SQL queries, stored procedures, and integrations. Ensu
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Posted 60+ days ago | Updated 8 hours ago

Lead Software Developer (.NET & Insurance Solutions) Remote

Gainwell Technologies LLC

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Remote or Houston, Texas, USA

Full-time

Be part of a team that unleashes the power of leading-edge technologies to help improve the health and well-being of those most vulnerable in our country and communities. Working at Gainwell carries its rewards. You'll have an incredible opportunity to grow your career in a company that values work flexibility, learning, and career development. You'll add to your technical credentials and certifications while enjoying a generous, flexible vacation policy and educational assistance. We also have
Posted 52 days ago | Updated 6 hours ago

Lead Software Developer (.NET & Insurance Solutions) Remote

Gainwell Technologies LLC

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Remote or Dallas, Texas, USA

Full-time

Be part of a team that unleashes the power of leading-edge technologies to help improve the health and well-being of those most vulnerable in our country and communities. Working at Gainwell carries its rewards. You'll have an incredible opportunity to grow your career in a company that values work flexibility, learning, and career development. You'll add to your technical credentials and certifications while enjoying a generous, flexible vacation policy and educational assistance. We also have
Posted 52 days ago | Updated 6 hours ago

Lead Software Developer (.NET & Insurance Solutions) Remote

Gainwell Technologies LLC

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Remote or Austin, Texas, USA

Full-time

Be part of a team that unleashes the power of leading-edge technologies to help improve the health and well-being of those most vulnerable in our country and communities. Working at Gainwell carries its rewards. You'll have an incredible opportunity to grow your career in a company that values work flexibility, learning, and career development. You'll add to your technical credentials and certifications while enjoying a generous, flexible vacation policy and educational assistance. We also have
Posted 52 days ago | Updated 6 hours ago

Lead Software Engineer - Backend (Hybrid/Onsite)

Visa Inc.

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Remote or Bellevue, Washington, USA

Full-time

Company Description Visa is a world leader in payments and technology, with over 259 billion payments transactions flowing safely between consumers, merchants, financial institutions, and government entities in more than 200 countries and territories each year. Our mission is to connect the world through the most innovative, convenient, reliable, and secure payments network, enabling individuals, businesses, and economies to thrive while driven by a common purpose - to uplift everyone, everywhe
Posted 16 days ago | Updated 10 hours ago

Information Security Consultant - Threat Detection & Adversary Simulation

Mass Mutual Financial Group

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Remote or Boston, Massachusetts, USA

Full-time

The Opportunity Within our Enterprise Cybersecurity organization, you will work closely with the Security Intelligence team and be responsible for leverage real world adversarial techniques to perform pen tests and simulate attacks on existing and upcoming services spanning across applications, servers, and end-user assets. The Team Within the Security Operations Center, partner with Incident Response Teams for Red/Purple Team assessments and work with Security Intelligence to identify and test
Posted 60+ days ago | Updated 10 hours ago

Lead Software Engineer, Design Technology

Tesla Motors

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Remote or Austin, Texas, USA

Full-time

Design Technology is responsible for making the tools Design Engineers use to design, e.g., batteries, Optimus, Robotaxi, and all new factories, every bit as intelligent and dynamic as the products themselves. As a Technical Lead Software Engineer, you will lead the research, development, delivery, and site reliability of products that touch virtually every part of our design process. Joining our team means directly impacting Tesla's ability to ship millions of products a year from factories ar
Posted 23 days ago | Updated 10 hours ago

(USA) Software Engineer III

Walmart Inc.

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Remote or Denver, Colorado, USA

Full-time

Position Summary Are you a seasoned software engineer looking to make a significant impact? Join Walmart/VIZIO as a Software Engineer in our Content Services team. This is a unique opportunity to work on cutting-edge technology, shape our software solutions, and help drive the future of our digital content. What you'll do About the Team: The Content Services team at Walmart/VIZIO is dedicated to delivering top-tier digital content experiences. We operate with a focus on innovation and scalabi
Posted 30 days ago | Updated 10 hours ago

Software Engineer - Remote

Donnelley Financial Solutions

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Remote

Full-time

Join a dynamic team at the pulse of global markets, where we deliver innovative software and service solutions for essential financial reporting and capital markets transactions. At DFIN, we are a values-driven organization that empowers you to build a fulfilling career while bringing your authentic self to work every day. Our "Win as One" mentality ensures that our team's success is directly linked to Client, Shareholder and Employee Satisfaction. Recognized by Newsweek as one of AMERICA'S MOST
Posted 13 days ago | Updated 10 hours ago

Electrical & Controls Engineer

McKesson Corporation

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Remote or Longmont, Colorado, USA

Full-time

McKesson is an impact-driven, Fortune 10 company that touches virtually every aspect of healthcare. We are known for delivering insights, products, and services that make quality care more accessible and affordable. Here, we focus on the health, happiness, and well-being of you and those we serve - we care. What you do at McKesson matters. We foster a culture where you can grow, make an impact, and are empowered to bring new ideas. Together, we thrive as we shape the future of health for patien
Posted 19 days ago | Updated 10 hours ago

Sr. Software Engineer

First American Financial Corporation

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Remote or Santa Rosa, California, USA

Full-time

Who We Are Join a team that puts its People First! As a member of First American's family of companies, First American Home Warranty offers a wide range of home warranty products and services to home sellers, buyers and agents. Since 1889, First American (NYSE: FAF) has held an unwavering belief in its people. They are passionate about what they do, and we are equally passionate about fostering an environment where all feel welcome, supported, and empowered to be innovative and reach their full
Posted 1 day ago | Updated 10 hours ago

Software Developer

Robert Half

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Remote or Pittsburgh, Pennsylvania, USA

Contract

Description We are looking for a skilled Software Developer to join our team on a long-term contract basis in Pittsburgh, Pennsylvania. This role focuses on backend development, requiring expertise in C#, ASP.NET, JavaScript, and database management. The ideal candidate will be passionate about innovation and thrive in creating efficient, user-friendly applications while collaborating with cross-functional teams. Responsibilities: Design, develop, and implement new features to enhance existing
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Posted 1 day ago | Updated 7 hours ago

Application Development Advisors- Hybrid

Cigna

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Remote or Plano, Texas, USA

Full-time

The job profile for this position is Application Development Advisor, which is a Band 4 Senior Contributor Career Track Role with Cigna-Evernorth Services Inc. Responsibilities- Develop software applications to support payment integrity programs, produce accurate claim payments, and reduce medical cost expenditures.Contribute to software development, strategy, and product roadmap.Use system development life cycle methodologies.Assist with the re-writing of end-to-end (E2E) vendor programs and t
Posted 36 days ago | Updated 10 hours ago

Senior .NET Developer

Infojini

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Remote or District of Columbia, USA

Contract, Third Party

Essential Duties & Responsibilities (Other duties may be assigned): Design, build, and maintain .Net applications, responsible for both front-end and back-end development. Conduct code reviews, provide feedback, and support team improvements. Write and maintain high-quality code, ensuring adherence to best practices. Write clean code for both front and back-end, optimizing performance, ensuring code quality, and staying updated with emerging technologies. Create and maintain data models to struc
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Posted 1 day ago | Updated 16 hours ago

QA Automation Engineer

Infojini

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Remote or District of Columbia, USA

Third Party, Contract

Essential Duties & Responsibilities (Other duties may be assigned): Develop and maintain automated tests, frameworks, and scripts using selected automation tools and frameworks (e.g., Selenium, Cypress, Playwright). Implement and execute automated tests in continuous integration (CI) and continuous delivery (CD) pipelines. Identify opportunities for test automation within manual testing processes and create test automation strategies accordingly. Collaborate with Architects and Product Owners to
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Posted 1 day ago | Updated 16 hours ago

Dotnet Developer

Randstad - Torc

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Remote

Contract

We are looking for a highly skilled Full Stack .NET Developer for a full-time contract. This is a 100% remote role with flexibility to collaborate across Central Time (CT) hours. What You ll Do Design, develop, and optimize web applications using .NET (C#) for the backend and modern frontend technologies.Collaborate with product managers, designers, and other engineers to build scalable, efficient solutions.Implement best practices in software architecture, automated testing, and performance opt
Posted 60+ days ago | Updated 2 days ago

Lead Software Developer (.NET)

Zachary Piper Solutions, LLC

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Remote

Full-time

Piper Companies is seeking a Lead Software Developer (.NET) to join a leading shipping and logistics organization. The Lead Software Developer (.NET) will oversee and enhance intricate customer deployments of a specialized SaaS platform. Responsibilities of the Lead Software Developer (.NET) include: Take part in planning and gathering requirements for technical projects, including designing, coding, testing, and troubleshooting applications. Build applications and services using our main techn
Posted 57 days ago | Updated 31 days ago

Entry-Level Software Engineer

Boeing Company

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Remote or Maryland Heights, Missouri, USA

Full-time

Entry-Level Software Engineer Company: Tapestry - G0G Tapestry Solutions, A Boeing Company, comes with over 30 years of industry experience designing, implementing, training, and supporting logistics information systems. A career with the Tapestry Solutions team brings the best of both worlds: access to the incredible depth of resources and opportunities of Boeing while working in a company having a small business, family-oriented culture. We have over 500 employees worldwide supporting our c
Posted 22 hours ago | Updated 10 hours ago

Full Stack \

ConsultNet, LLC

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Remote or Birmingham, Alabama, USA

Full-time

Full Stack "Data " Engineer Remote (EST or CST) 8 month contract Pay Rate: $50.00 to $52.00 per hr. We're looking for a hands-on Full Stack "Data " Engineer with experience on Palantir to support a major migration from a legacy system to a modern enterprise data platform. This role is part of an ongoing transformation project that began in early 2025. You'll help accelerate development by contributing to backend services and high-performance data pipelines in a collaborative Agile environment.
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Posted 58 days ago | Updated 10 hours ago