Deniz Yılmaz was born on February 26, 1988 in Neu-Ulm, Germany, and started his career as an Azerbaijani national football player of Turkish origin. His football journey started in the infrastructure of clubs such as TV Wiblingen and SSV Ulm 1846; He attracted attention by scoring 15 goals in 13 matches in the U-19 Bundesliga with the Ulm U-19 team in the 2004-05 season.
After winning the European championship with the Turkish U-17 national team in 2005, he was transferred to the youth teams of the German giant Bayern Munich.
During his years in the Bayern Munich infrastructure, he scored 11 goals in 17 matches at the U-19 level, leading the team to the German finals; In the next season, he reached the final again by winning the southern group and took the team to the final with two goals in the semi-final. He played five times in the Regionalliga of Bayern Munich II in the 2005-2006 season, and then returned to the team by signing a professional contract in the 2007-2008 season.
He showed his most productive performance in the 2009-10 season with 13 goals in 29 matches, and in the 2010-11 season he scored 33 goals in 115 matches for Bayern Munich II. He also joined the first team in the same period, but although he was included in the squad for a match against VfL Wolfsburg, he did not have the chance to take the field.
He left Bayern in the 2008-09 season and was transferred to 1. FSV Mainz 05 without a transfer. Although he could not find a place in the first team in the first half, he performed effectively in the second team and was included in the Bundesliga squad in the middle of the 2011-12 season. He made his debut in the Bundesliga on January 22, 2012, playing in the starting 11 in the match against Bayer04Leverkusen.
Yılmaz, who was loaned to the 2nd Bundesliga team SC Paderborn 07 in the 2012-13 season, showed that he was in good form by scoring a goal in the first three weeks of the league and making an assist in the fourth week. At the end of the same season, on 29 June 2013, he signed a four-year contract with Elazığspor; He made his Super League debut against Kayserispor on 31 August 2013 and scored a goal. He became the top scorer of his team by scoring 12 goals in 28 matches throughout the season.