A JScript developer specializes in the Microsoft implementation of ECMAScript, known as JScript. They design, develop, and implement software applications using JScript language. They write, test, debug, and maintain JScript code to ensure optimal performance and functionality. They also troubleshoot and resolve any issues in the software, improve and update existing software, and work in collaboration with other developers. Moreover, they ensure the software meets user needs, follows security protocols, and is compatible with different browsers and devices. They also stay updated with the latest JScript updates, improvements, and best practices.