Location: Tring (Predominately onsite with flex where project allows)Duration: 4-6 month contractIR35: Outside IR35 Role detaills:Our client, a leading entity in the Defence and Security sector, is seeking a highly motivated Senior Software Engineer to join them on a contract basis - The role will encompass the design and development of a web-based control and monitoring dashboard application for an antenna terminal system. Key Responsibilities:Design and develop a web-based control and monitoring dashboard application for an antenna terminal system.Engage in the full design life cycle from specifications generation to thorough regression testing of pre-production units.Build and maintain React/Next.js frontend applications and NestJS backend services within a shared pnpm monorepo environment.Integrate user-facing components with backend services using various communication protocols (REST, WebSockets, SNMP, MQTT, etc.).Develop the GUI using a mix of off-the-shelf UI components and custom modules.Ensure the UI code is well-structured, scalable, and testable, conforming to UX/architecture guidelines.Ensure compliance with modern accessibility standards and usability best practices across browsers and devices.Contribute to software architecture, project planning, and specification documentation.Job Requirements:Proficiency in frontend technologies including HTML5, CSS3, JavaScript, TypeScript, React, and Next.js.Experience with backend services using NestJS and related TypeScri