Koffie, 24, joined Whitecaps in 2010 from Ghana Premier League side Inter Allies and rose through the ranks to become a key cog in the club's midfield.
He played for Vancouver's USSF D-2 Pro League team.
Koffie recorded nine goals and seven assists in 133 appearances for Vancouver Whitecaps FC and is one of two players to start in each of the team's four MLS Cup Playoffs matches, playing over 10,000 minutes.
The midfielder was called up to Ghana's U-20 team in 2010