He plays as a striker and got his breakthrough in 2008, scoring four goals in Allsvenskan alongside Henrik Larsson in Helsingborgs IF.

[citation needed] During the season 2010 in Allsvenskan, Helsingborgs IF Finished in second place just two points short of Malmö FF.

Helsingborg however didn't allow this to let them down after a good season and finished it off on a high winning the Svenska Cupen in a final against Hammarby IF with Rasmus scoring the only goal in the game late on.

[citation needed] On 11 September 2011, Rasmus Jönsson made his Bundesliga debut from start against Schalke 04 and he assisted for Mario Mandžukić's second goal.

[1] On 9 August 2013, it was announced that Jönsson would join the Danish Superliga club AaB on a loan spell for the 2013/2014 season.