Backing out of accepted post-doc position in favor of a permanent faculty position
Getting a permanent position is the goal of every post-doc. That a post-doc is applying for such positions and will leave as soon as an application is successful (which is a quite rare and lucky event) is expected. No need to delay applying for post-doc positions or telling anyone about your plans to apply for permanent positions. You also won't tell them about that lotto ticket you plan to buy, will you?