Born in Rio de Janeiro, Brazil, Nem began his professional career at Fluminense. He was loaned out to Figueirense in 2011. His time at the club was very successful. He scored nine times from a second striker position and was awarded the best newcomer of the 2011 Brazilian league, beating Bruno Cortes and Leandro Damio. Upon the expiration of his loan he was returned to the first team at Fluminense.
In his first season at Fluminense, Nem played mostly as a left winger or second striker and managed six goals and eight assists in 34 appearances in an impressive first full season at the club. In the 2013 season, Nem scored two and assisted two more in the first part of the season.
Wellington Nem signed a five-year deal with Ukrainian giants Shaktar Dontesk for a fee believed to be around 8 million in mid-2013. His first season at Shakhtar was a huge disappointment. A lot was expected of the player but he spent most of the campaign on the sideline either injured of benched, playing just 140 minutes of football the whole 2013-14 season and scoring a solitary goal. The next season started similarly, with Nem left off the sides Champions League list and playing just once in the first 13 rounds of the Premier Liga.
Following 2017, Nem is going to play, on loan, for Brazilian side So Paulo FC, in the Brazilian League.
- As of 26 July 2017
|So Paulo (loan)||2017||9||1||4||0||1||0||8||0||22||1|