Senior .NET & React Full-Stack Engineer | TS Clearance

Applied Information Sciences, Inc.; Washington (District of Columbia); On-site; USD 100,000 - 150,000; Full time

Job summary

Applied Information Sciences (AIS) is seeking a Senior .NET & React Full Stack Developer to join our team for a mission‑critical federal client in Washington, DC. You’ll develop secure web applications, work across back-end and front-end technologies, and contribute to cloud‑aware solutions.

As a senior engineer, you will lead design decisions, review code, mentor teammates, and collaborate with clients. This role requires Top Secret clearance, 3–5 years of experience, and strong

Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, IT, or related field.
• 3–5 years of professional software development with C# and the .NET framework.
• Experience with ASP.NET, Entity Framework, and SQL Server.
• Experience building front-end components with React, JavaScript/TypeScript, HTML, and CSS.

Responsibilities

• Design, develop, test, and maintain full-stack application features using C#, ASP.NET, Entity Framework, SQL Server, React, JavaScript/TypeScript, HTML, and CSS.
• Build responsive front-end interfaces using React and modern UI development practices.
• Develop scalable and secure backend components and APIs to support application functionality.
• Modify and enhance existing code to improve performance, usability, and maintainability.
• Integrate third-party tools, APIs, and services as needed.
• Participate in the full SDLC, including planning, requirements analysis, development, testing, and deployment.
• Write clean, secure code aligned with best practices and team guidelines.
• Conduct unit and integration testing to ensure functionality and reliability.
• Troubleshoot and resolve application, integration, and performance issues.

Skills

C#

ASP.NET

Entity Framework

SQL Server

React

JavaScript/TypeScript

HTML/CSS

REST APIs

GitLab

Docker

Education

Bachelor's degree in Computer Science, Software Engineering, Information Technology, or related field

Tools

GitLab

Docker

Job description

Applied Information Sciences (AIS) is seeking a Senior .NET & React Full Stack Developer to join our team for a mission‑critical federal client in Washington, DC. You’ll develop secure web applications, work across back-end and front-end technologies, and contribute to cloud‑aware solutions.

As a senior engineer, you will lead design decisions, review code, mentor teammates, and collaborate with clients. This role requires Top Secret clearance, 3–5 years of experience, and strong