It seems like it would be useful if you could specify the methodCall parameter as a string.
public static void AddOrUpdate([NotNull] string recurringJobId, [NotNull] string methodCall, [NotNull] string cronExpression);
This way, it would be possible to add recurring jobs without requiring a reference to the classes used.
We will have some worker services that may need to reference some major projects. But we want to customize the jobs from our website. But I don’t want to add references to all those big projects from our website.