A Deloitte Web Developer is responsible for designing, developing, and maintaining web applications for clients or internal business needs. They work with front-end and back-end technologies, ensuring websites and web applications are functional, secure, and user-friendly. Developers collaborate with designers, project managers, and other stakeholders to meet business requirements. They may also optimize web performance, troubleshoot issues, and stay updated on industry trends. The role requires proficiency in programming languages like JavaScript, HTML, CSS, and frameworks such as React or Angular.