His PhD thesis title was On the Subject of Topological Characterization of Euclidean Spheres and his advisor was Stefan Mazurkiewicz.

In the interwar period, Borsuk visited Lwów, which was a thriving center of mathematics of the Second Polish Republic, and began his collaboration with Stanisław Ulam, especially in the field of topology.

Borsuk joined the mathematicians in the Scottish Café and contributed to the open problems which they wrote down in the famous book.

[2] During World War II, he run a stationary store and provided a secret meeting place for the Home Army.

He designed and published a number of board games including Animal Husbandry, which enjoyed great popularity and was re-released in 1997 as Superfarmer.

[5] In 1945, he completed a project in collaboration with Bronisław Knaster and Kazimierz Kuratowski concerning the establishment of the Institute of Mathematics of the Polish Academy of Sciences.

[11] In 2008, a commemorative plaque in honour of Borsuk was unveiled at the entrance to the tenement house in Warsaw at Filtrowa 63 Street where the mathematician used to live.