Software Engineer-React Jobs

Principal Software Engineer (React)Software Engineer (React) Location: Aurora, CO Required Clearance: Top Secret/SCI with CI PolySince 1999, ITEC has been a powerhouse in supporting mission-critical programs for the DoD and Intelligence community, building a solid reputation along the way. At ITEC, we don't just care for our employees—we champion them with competitive salaries, an outstanding employee care program, and a benefits package that includes Medical, Dental, Vision, Paid Time Off, and a 401k match.U.S. Citizenship Mandatory: Due to our US federal government contract, candidates for this position are required to be a US Citizen and will be subject to a background investigation.Job Description:We are seeking a Principal Software Engineer with experience building modern web applications using React and the backend services that support them. This role focuses on modernizing our front?end architecture, implementing new React-based interfaces, and developing the underlying back-end infrastructure and web server functionality required for a responsive and scalable application.You will design and maintain server-side components that handle incoming requests, manage persistent client connections, and provide the data pipelines the front end depends on. This includes establishing the environment, tooling, and integration patterns necessary for a clean, maintainable React application.Job Responsibilities:Develop and maintain React-based front-end features and the back-end services that support them.Build and configure web server components that handle client requests and application data flows.Implement mechanisms for managing client connections and delivering responsive UI interactions.Set up modern front-end tooling, build pipelines, and testing frameworks.Ensure reliability, performance, security, and usability across the full stack.Apply sound engineering practices throughout design, development, testing, and deployment.Required Skills:Experience building production React applications.Experience developing or integrating backend services or web server components.Strong understanding of JavaScript/TypeScript and modern UI architecture.Familiarity with request/response patterns, client connection handling, and server-side integration.Knowledge of front-end build tools and automated testing frameworks.Ability to collaborate across teams and deliver maintainable, scalable solutions.