Top C# Jobs in Washington, DC

Designs, develops, and executes IT solutions and applications to support HQ USAF wargames. Deploys and manages LAN server suites for hundreds of clients, maintains hardware/software/network architectures, provides system administration and security (ISSM/ISSO) support, and develops participant training and post-game analysis.

Lead design, development, and management of software and database applications supporting USAF wargaming. Provide systems engineering, supervise developers and IT staff, manage LAN and ISSM/ISSO functions, advise leadership, and improve wargame infrastructure and post-game analysis.

Design, build, test, deploy, and support software for USAF wargaming; develop UI/UX (including map interfaces), integrate M&S and databases, support systems engineering, and employ multi-agent/LLM-based tools like MAGE during planning and execution phases.

The Sailpoint Consultant will maintain and support SailPoint IIQ infrastructure, troubleshoot issues, develop scripts, and assist project teams with identity and access solutions.

Design and develop solutions using Power Apps and Power Automate. Lead design sessions, implement data models, and manage solution lifecycles. Mentor junior developers and ensure adherence to governance best practices.

The SharePoint Consultant will design, develop, customize, and integrate SharePoint web portals, supporting applications development and workflows for clients.

The .Net Developer will design, build, test, and maintain scalable web applications using .NET technologies, and coordinate development tasks across teams.

Design, build, and maintain cloud-native full-stack applications and backend services that support investment risk analysis. Own end-to-end delivery, contribute to architecture, apply automated testing and CI/CD, collaborate with stakeholders, reduce technical debt, and ensure reliable, observable data and analytics for portfolio risk and simulations.

Senior full‑stack .NET engineer responsible for design through production of secure, scalable web applications. Work includes C#/.NET backend, WPF/WCF components, REST APIs, frontend JS/HTML/CSS, cloud migration, code reviews, testing, and performance/security analysis. Expected to lead architecture, collaborate with teams, and apply SOLID, OOP, and SOA principles.

Develop and maintain Ruby and Rails applications, write Bash scripts, troubleshoot performance and multithreading issues, optimize SQL/MySQL queries, administer Unix/Linux/Solaris servers, and collaborate in Agile teams. Participate in API and SOA development and use source control (SVN/Git).

Develop and maintain a Blazor Server-based document publishing platform: render XML to HTML, implement C#-driven UI behavior, JS interop for rich in-browser editing, ensure security and accessibility, contribute to Azure DevOps CI/CD, participate in code reviews, documentation, UAT, and coordinate with stakeholders to deliver production-ready features.

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

Design, implement, deploy, and operate large-scale distributed backend systems and Azure infrastructure for AI-driven insights. Apply generative AI/ML, build IaC and CI/CD pipelines, support live-site operations, and execute onboarding and operational tasks for GCC‑High/DoD environments while ensuring security, observability, and cross-team collaboration.

Lead technical planning and execution of AWS-to-Azure cloud migration and enterprise application modernization. Design Azure architectures, develop migration roadmaps, guide engineering teams, ensure security and compliance, produce technical documentation, and support executive briefings and incident restoration.

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.

Lead the design and development of Windows desktop applications, focusing on architecture, accessibility, and best practices, ensuring quality and performance across releases.

Design and implement runtime protocols, formats, and systems to capture, serialize, stream, and replay interactive 3D content across engines and AI models. Own engine subsystems from low-level C++ runtime to high-level C# APIs, optimize for performance, determinism, and low-latency streaming, and build interfaces for AI systems to inspect and invoke engine capabilities.

Design, develop, configure and administer SharePoint 2010 farm solutions including sites, templates, workflows, web parts and custom code (C#/ASP.NET). Lead migrations from PlumTree, configure service applications (Search, Excel Services, PerformancePoint), use PowerShell for administration, and coordinate deployments across development, test and production environments.

As a Software Engineer, you will design and build backend services for Relativity's generative AI platform, focusing on scalability and reliability in distributed systems.

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.

Lead architecture and design for highly available, low-latency cloud services. Drive AI-first engineering practices, evaluate and integrate AI-assisted development tools, mentor engineers, perform code and architecture reviews, and collaborate with Product and Design to build scalable, observable, and automated systems.

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

Design, build, deploy, and operate backend services, APIs, integrations, and web applications. Own end-to-end features, improve CI/CD and observability, troubleshoot cross-service issues, participate on-call, and collaborate with product and leadership to deliver reliable production systems.

Develop and maintain cloud-based enterprise web applications using React, C#/.NET and/or Python. Build RESTful APIs, work with SQL Server/PostgreSQL, participate in CI/CD and Azure deployments, troubleshoot production issues, follow secure coding and accessibility standards, and collaborate on Agile teams.

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.