In a word, "no".
You don't need stop bath. Even if any meaningful continued development occurred in the water rinse before the fixer, it would likely be accounted for when you establish your development times through testing.
Even better is to use an all-alkaline processing workflow, with alkaline developer followed by water rinse and then by an alkaline fixer, such as the Formulary's TF-4. IINM this is the recommendation of at least Ilford, if not Kodak also. More archival, since it rinses cleaner for a given wash time, and obviates the need for hypo clear.