Senior Full Stack .Net Developer (onsite)

System One; Washington (District of Columbia); On-site; USD 130,000 - 170,000; Full time

Job summary

System One in Washington, DC is seeking a Senior Full Stack .NET Applications Developer to design, build, and maintain web applications using .NET Core C#, ASP.NET Core Web API, Angular 16+, EF Core, and SQL Server. You’ll contribute from database design to front-end implementation in a fast-paced Agile environment.

You will collaborate with developers, QA engineers, and business analysts and participate in code reviews, testing, and deployments.

Qualifications

• 7+ years of .NET C# development including web apps.
• Proficiency with .NET 8, ASP.NET Core Web API, EF Core, and SQL Server.
• Experience with Angular 16+ and RESTful API design.
• Strong collaboration in Agile teams and CI/CD pipelines.
• Self-motivated with ability to manage multiple projects.

Responsibilities

• Design, develop, and maintain full-stack web applications.
• Collaborate with QA, business analysts, and other developers.
• Implement secure, scalable RESTful services and UI features.
• Participate in code reviews, testing, and deployments.
• Adhere to CI/CD processes using Git and GitLab.

Skills

.NET Core

ASP.NET Core Web API

Angular 16+

Entity Framework Core

SQL Server

RESTful APIs

CI/CD

Git/GitLab

Agile development

Problem-solving

Tools

Git

GitLab

Job description

Senior Full Stack .Net Applications Developer
Washington, DC – 100% Onsite
Per Federal contract U.S. citizenship is required
Must be able to obtain Public Trust clearance
W2 or C2C

Seeking an experienced Full Stack Sr Application Developer to join our development team. They will build and maintain powerful web applications using our modern tech stack: .NET Core C#, Web API, Angular 16+, Entity Framework, and SQL Server. In this role, they will contribute across the entire application lifecycle - from database design to front-end implementation. They will work collaboratively with other developers, QA engineers, and business analysts in our fast-paced Agile environment to deliver software solutions.

Technical Skills:

• Design and develop components across the full technology stack
• Create and maintain database schemas, stored procedures, and efficient SQL queries
• Implement secure, scalable RESTful APIs and service integrations
• Build responsive, intuitive user interfaces using Angular
• Write clean, well-tested, maintainable code
• Troubleshoot complex technical issues across the stack
• Participate in code reviews, testing, and deployment activities
• Collaborate with cross-functional teams to meet project requirements
• Follow CI/CD processes using Git, GitLab and related tools

Required Skills & Experience:

• 7+ years of experience with .NET C# development, including web applications
• Strong proficiency with our core stack:
• .NET 8 framework and ASP.NET Core Web API
• Entity Framework Core
• SQL Server
• Angular 16 and later
• Experience with Git-based version control systems
• Strong problem-solving and analytical skills
• Self-motivated with ability to manage multiple projects
• Quick learner adaptable to new technologies
• Experience working in Agile development teams

Preferred Qualifications:

• Microservices architecture experience
• Containerization knowledge (Docker, Kubernetes)
• Cloud platform implementation experience
• Unit testing frameworks expertise

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Ref: #851-Rockville-S1