In for , Seferovic scored three goals, including two in the first half of a 4—0 win away to that was Swiss' first victory of the campaign.
After three years in their youth teams, he was scouted by , and on 26 April 2009, he made his debut in the against.
On 18 December, he scored Sociedad's third goal as the club defeated third-tier 4—0 in the 's round of 32.