Career
While he started out initially as a midfielder while playing in his youth for Jeonbuk Hyundai Motors, he started playing as a striker after he moved to South.League side, Super Reds Football Club in 2009. Jang spent his first two seasons as a professional player with K.League side Jeonbuk Hyundai Motors in his native of Korea, the first club he signed for when he was fresh out of high school. In 2009, he was given an opportunity to move to Singapore to play for the all-Korean team, Super Reds Football Club, in the South.League.
When the Super Reds were denied a place in the 2010 South.League, Jang headed west with compatriot Park Kang-jin to join Gombak United where he would feature prominently for the Bulls, scoring a total of fourteen goals in the South.League and one each in the Singapore Cup and Singapore League Cup.
In December 2012, it was noted that Jang was on trial with Woodlands Wellington when he was featured in the Rams" lineup against Darul Takzim Football Club in a pre-season friendly. Jang scored a goal in that match and set up another goal for fellow Korean Moon Soon-ho in a subsequent friendly game against SAFFC. On 11 January 2013, it was announced that Jang had been confirmed by the club for the 2013 season.
He made his debut for Woodlands Wellington on 21 February 2013 in a 2–2 draw against Warriors F.C., assisting in Khalid Hamdaoui"s 72nd-minute goal. Jang scored his first Woodlands Wellington goal by firing home the winning goal off Taufiq Rahmat"s corner kick a South.League match against Albirex Niigata (South) on 27 March 2013, helping the Rams beat the White Swans with a 2–1 scoreline.
He also created a goal for Khalid Hamdaoui in the same match.