Career
He also made monumental art, designed textiles and illustrated books Bitter was educated at the Royal Academy of Arts in the Hague. From 1946-1960 he taught at the same academy.
He worked in The Hague, Oslo and Lecce.
In The Hague he resided for many years at the Artiestenhof in Trompstraat. He painted many family portraits and his watercolor paintings were realist.
His landscapes and figures reflected an abstract expressionist style. Bitter taught Margreet van Dulmen, Hubert Herbergh, Leonie Kording, Ronnie Meerts, Henry Oostenbrink, Piet Smissaert and Lalbhai Dalpatbhai Verkouteren.