Top .NET Developer Jobs in Washington, DC

Develop, customize, test and deploy .NET applications. Enhance existing systems, write code and tests, manage defect tracking, create technical specs and test plans, integrate services and support CI/source control, and learn new technologies to support enterprise packaged solutions.

The Senior .NET Developer will modernize applications, enhance legacy systems, lead Agile activities, and mentor junior developers while utilizing backend technologies.

Develop, enhance, and maintain backend web applications and services using C#/.NET. Implement features with ASP.NET, Entity Framework, and SQL Server; write unit and integration tests; perform troubleshooting, code reviews, vulnerability remediation, and O&M tasks while collaborating with senior engineers and cross-functional teams.

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

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.

Expert-level full‑stack .NET engineer who designs, develops, tests, and supports secure, scalable enterprise applications. Leads large projects, authors technical specs, mentors engineers, enforces SDLC and security/audit requirements, participates in Agile/Scrum, and drives technical strategy and innovation. Availability for occasional travel and on-call support is required.

Design, build, and maintain production-grade .NET web applications and APIs on Azure. Own full-stack delivery from data models and SQL to front-end components, CI/CD, testing, and architecture. Collaborate with product and delivery teams, participate in code reviews, and ensure secure, observable, well-tested services.

The role involves full-stack software development, adhering to Agile practices, and collaborating across teams. Responsibilities include coding, testing, and maintaining software systems while mentoring team members.

Develop, test, deploy, and maintain .NET-centric web applications using C#, Angular 17+, and Azure. Build and consume REST APIs, work with SQL Server, source control, CI/CD pipelines, and collaborate on code reviews, debugging, performance optimization, and third-party integrations.

Develop and maintain scalable software solutions, mentor developers, and integrate AI tools. Collaborate on technical solutions aligned with business goals.

Design, develop, test, and manage full-stack .NET applications; integrate third-party components; improve and automate operations; support large-scale data processing, statistical modeling, and advanced analytics; participate in all SDLC phases; conduct architecture reviews and knowledge transfer.

Lead technical direction for a major product domain, reduce architectural debt, mentor engineers, standardize AI-agent workflows, and design scalable backend solutions integrating LLMs and cloud services. Drive cross-team RFCs, cookbook standards, and adopt agentic AI tooling while balancing security, quality, and delivery.

Design, develop, and maintain scalable ASP.NET/C# APIs and microservices and front-end interfaces (Vue.js, AngularJS) for retail omni-channel and POS platforms. Contribute to architecture, write production-quality code, troubleshoot issues, participate in code reviews, and collaborate with product, design, and QA to deliver features with minimal onboarding.

Design, develop, implement and support web applications using .NET Core. Collaborate with internal bank teams and external vendors, troubleshoot production issues, and apply strong interpersonal, leadership, and problem-solving skills.

Designs, codes, tests, and documents .NET applications; follows SDLC and Agile/Scrum practices; supports Tier 3 incidents; works on system integration and CI/CD (Jenkins, GitHub); collaborates with product owners and vendors; participates in production releases and mentors junior developers.

Seeking a Senior Full Stack .NET Developer to work on a social good project, with strong skills in C#, AngularJS, design, and UX. Requires 5+ years of experience.

The Staff Engineer will leverage 5+ years of experience in C#, JavaScript, and frameworks to lead and innovate solutions in a collaborative environment.

Own production reliability for customer-facing radar and weather data services across Azure, colocation, and edge Kubernetes. Refactor C#/.NET services for multi-replica safety, design multi-cluster HA, operate self-managed Kubernetes, improve observability and automation, lead incident response and postmortems, and drive operational excellence and capacity planning.

Design, build, test, and maintain full-stack web applications for a federal client using C#, .NET, ASP.NET, Entity Framework, SQL Server, and React. Develop secure, scalable backend APIs, responsive front-end interfaces, integrate third-party services, remediate vulnerabilities, participate in SDLC activities, and collaborate with clients and teammates on architecture, performance, and deployment.

Develop, test, debug, and enhance software solutions for a federal customer. Integrate design requirements, resolve compatibility issues, research emerging technologies, produce technical documentation, troubleshoot applications, and prepare analytical progress reports.

The .Net Developer designs and implements software applications, analyzes system changes, collaborates with departments, and develops complex programs in compliance with standards.

The Senior SharePoint .Net Developer will design, develop, and maintain SharePoint environments, troubleshoot production issues, and lead application development teams.

The .NET Web Application Developer will create and maintain web and mobile applications, collaborating with teams to meet client requirements while keeping up with industry trends.

The job involves developing applications using .NET technologies including C#, ASP.NET, and MVC, along with web client frameworks.

Senior .NET full-stack developer responsible for custom application development, API integrations, database optimization, deployments, troubleshooting, performance, security, and production support using .NET/C#, ASP.NET Core, SQL, modern frontend frameworks, cloud, and CI/CD.