When was Mozart superior court post?

Wolfgang Amadeus Mozart held the position of court composer in Salzburg, which can be considered his "superior court post," from 1777 until his departure in 1781. However, his role was not a formal title but rather a reflection of his service to the Archbishop Colloredo. This position allowed him to compose various works, but he often felt constrained by the limitations it imposed on his creative freedom. Ultimately, Mozart left Salzburg in 1781 to pursue a more independent career in Vienna.