A FuelPHP developer designs, develops, and maintains web applications using the FuelPHP framework. They work with databases, write clean and reusable code, and ensure the application's scalability and performance. They also debug issues, implement security measures, and integrate third-party APIs. Moreover, they collaborate with other team members to design user-friendly interfaces, troubleshoot software issues, and optimize code. Their role also involves staying updated with the latest industry trends and advancements in FuelPHP and other relevant technologies. They may also be involved in the entire software development life cycle, from conception to deployment.