On January 31, 2020 Lambropoulos was loaned to German 2. Bundesliga club VfL Bochum.
On August 14, 2020 he signed a two year contract at “Die Unabsteigbaren”, their nickname meaning “Those who can’t relegate”. The nickname derives from the 70’s and 80’s as they were promoted in 1971 to the Bundesliga and achieved to be just above the drop every year till 1993. Since then the club is like a yo-yo between the two Bundesliga’s.