A Code Igniter developer specializes in using the Code Igniter framework, a powerful PHP tool for building dynamic and intuitive websites. They design, develop, and maintain web applications, ensuring optimal performance, quality, and responsiveness. They write clean, maintainable, and efficient code while adhering to best coding practices. They are often involved in all stages of the project lifecycle, from conception to final product. They also troubleshoot and debug applications, provide user support, and collaborate with other team members to improve usability. Additionally, they may integrate data from various back-end services and databases and help in maintaining system documentation.