[4] As a director, he won the if.comedy Best Newcomer Award with Tom Basden for Won't Say Anything in 2007 and again in 2009 with Jonny Sweet for Mostly About Arthur.
His one-man play Stefan Golaszewski Speaks about a Girl He Once Loved was performed at the Edinburgh Festival in 2008.
[6] Golaszewski is a part of the comedy troupe Cowards, which also includes Tim Key, Tom Basden and Lloyd Woolf.
[7] Golaszewski's sitcom Him & Her, starring Russell Tovey and Sarah Solemani, aired on BBC Three for four series from 2010 to 2014 and won the 2014 British Academy Television Award for Best Situation Comedy.
[8] Golaszewski wrote Sex with a Stranger, staged in early 2012 and starring Tovey and Jaime Winstone.