Mix crushed crackers, mayonnaise, Dijon, seafood seasoning, Worcestershire sauce, egg, cayenne, and salt together in a large bowl. Add crabmeat and stir until combined but still chunky. Cover and refrigerate for 1 hour.
Sprinkle bread crumbs onto a plate. Shape chilled crab mixture into four small, thick patties. Coat patties completely with bread crumbs.
Melt butter in a skillet over medium heat. Add crab cakes and cook until golden brown, about 4 minutes per side.