Krzysztof Cwalina (born February 5, 1971 in Wroclaw, Dolnoslaskie) is a retired freestyle swimmer from Poland.
He competed for his native country at the 1992 Summer Olympics in Barcelona, Spain, finishing in eighteenth place in the men's fifty-meter freestyle event.
Cwalina graduated with a B.S.
and an M.S.
in computer science from the University of Iowa.
As of 2012 he is a program manager on the Common Language Runtime team at Microsoft Corporation.
He and Brad Abrams coauthored Framework Design Guidelines (Addison-Wesley, 2005; 2nd 2008, ISBN 978-0321545619), winner of a Jolt Award in 2006.