Weilandt started playing football with local Rostock clubs SV Warnemünde and LSG Elmenhorst. In 2003, he joined the youth ranks of Hansa Rostock where he also became German under 19 champion in 2010.[4] In the following year he eventually made it to the club's first team squad, making his debut in a 3. Liga match versus SV Wehen Wiesbaden on 30 April 2011.[5]