A Microsoft Dynamics NAV developer designs, develops, implements, and maintains Microsoft Dynamics NAV software and its various components. They understand business operations to customize and adapt the software to meet specific client needs. This includes creating new functionalities, troubleshooting issues, improving performance, and integrating the NAV system with other software. They also support end-users, provide technical guidance, and ensure system security and efficiency. Additionally, they work closely with project managers and stakeholders to deliver solutions that optimize business processes. They must keep abreast of the latest updates and features of Microsoft Dynamics NAV to provide the best service.