Jansson began his senior career at Kalmar FF and played 11 games in the Allsvenskan in 1985, as the "Red brothers" finished second, just two points behind champions Malmö.
Jansson moved back to the top flight with Öster and scored two goals in 20 league games in 1988 as the club was relegated to Division 1.
New manager Hans Backe then led Östers to the Division 1 Södra title in 1989, with Jansson scoring 14 goals in 26 appearances.
He moved to England with First Division side Port Vale on a three-month loan in November 1996, during the Swedish winter break.
[3] He won seven caps for the senior Sweden team between 1991 and 1994 and represented his country at UEFA Euro 1992 and the Joe Robbie Cup.