As a programmer have been developing applications for Navision (nowadays called Business Central) for over twenty years. Working for several Dutch Microsoft partners I created add-ons and customisations for their clients.
I am experienced in almost all Navision modules and have seen almost all the it's code. The work I did with Navision included upgrading add-ons, integration with other applications, web services, and much more.
I can help you woth practically every technical aspect of Navision and its successors, or extra capacity on your development projects.