Top Senior C# Jobs in Washington, DC

Design, build, and scale the Substantiation Platform for validating and reconciling financial data. Provide architectural leadership and mentor engineers.

Lead the design and development of Windows desktop applications, ensuring performance, accessibility, and collaboration with various teams. Oversee the entire feature lifecycle and address complex issues in a user-centric manner.

As a Senior Software Engineer, you'll design architecture, mentor engineers, and drive the adoption of AI practices to enhance development workflows and system reliability.

Develop and maintain web applications for federal clients using .NET technologies, ensure system integration, and provide innovative troubleshooting solutions.

As a Sr. Full Stack .NET Developer, you will develop web applications, establish client trust, troubleshoot issues, and ensure software performance.

The Senior Software Engineer will design, develop, and maintain enterprise integration solutions, focusing on Azure services and microservices architecture, ensuring smooth communication across systems.

The Senior Software Engineer will design, develop, and maintain integration solutions, focusing on Azure services and microservices architecture, while mentoring junior developers and ensuring best practices in software development.

The Lead Developer oversees the development of enterprise applications, mentoring teams, ensuring quality implementation, and driving continuous improvement in an agile environment.

The Senior Financial Systems Developer designs and implements solutions for business needs, focusing on Elite 3E frameworks and financial applications.

The role involves designing, developing, and testing applications using .NET technologies, building APIs, and implementing AI/ML solutions. Responsibilities include contributing to architectural decisions and mentoring team members.

The Senior ASP.NET Services Engineer designs and develops microservices and APIs for the Committee Portal, managing databases, automation, and DevOps processes while collaborating in an Agile environment.

As a Senior Software Engineer in Test Automation, you'll design automation frameworks, develop CI/CD pipelines, and ensure the quality of VR training products.

Design and maintain healthcare software integrations, ensuring data flow between Epic EHR and systems while mentoring developers and ensuring quality standards.

The Senior Power Apps Developer will implement Microsoft Power Platform solutions, interact with clients, and drive project phases while ensuring high-quality development standards.

Serve as a senior SME to architect, design, and modernize secure, scalable DOJ software systems. Lead cloud migrations, CI/CD/DevSecOps, compliance (RMF/STIG/FIPS/FedRAMP), ATO support, observability, and mentor engineering teams while ensuring operational continuity in secure environments.

Design, develop, test, and deploy secure, scalable applications and APIs for DOJ missions. Implement microservices, CI/CD, containerization, and cloud/IaC solutions; harden systems to RMF/STIG/FIPS/FedRAMP standards. Contribute to ATO packages, support production operations and incident response, and collaborate in Agile teams while producing tests and documentation.

Seeking a Senior IT Developer/Engineer with extensive experience in .NET technologies, Oracle databases and software development lifecycle, to lead design and coding efforts.

As a Modeling and Simulation Engineer, you will design advanced models, perform quantitative analysis, and support national defense initiatives.

The Senior Software Development Engineer will develop scalable solutions for MinuteClinic, collaborating with teams to improve patient experience and clinical workflows while leveraging AI technologies.

The role involves full-stack development on financial technology solutions, focusing on user-facing applications, internal tools, and data pipelines, requiring collaboration across teams.

The Senior Applications Developer will design and implement software solutions, particularly using Angular, while ensuring quality and timely delivery of projects. Requires extensive software development experience and collaboration across teams.

Lead the development of web applications, guiding feature development from design to production, while mentoring a small Agile team and driving modernization initiatives.

The Lead Power Platform Developer/Architect will design scalable Power Apps solutions, lead technical teams, conduct architecture reviews, and ensure alignment with business objectives.

The Senior Software Engineer will develop and maintain web applications, lead development teams, and ensure high-quality solutions through the full software development lifecycle.

The role involves developing cross-platform API abstractions for the Unity Editor using modern C++. Responsibilities include maintaining codebases and collaborating with worldwide teams.