Heerenveen Valpoort joined the youth academy of
Heerenveen at the same time as future professional
Luciano Narsingh, and later stated that he saw the latter's breakthrough as a source of inspiration. In the youth teams he regularly showed his scoring ability, for example in the U19 league where he with 16 goals to his name finished third in the top goalscorers list. This achievement earned him a promotion to the first team where he initially signed a one-year contract with the option of an extra year in June 2011. On 4 December 2011, Valpoort made his debut in the
Eredivisie, coming on as a substitute for the injured Narsingh in a 5–1 win over
AZ. On 31 January 2012, he made his debut in the
KNVB Cup in a match against
Vitesse. In March 2012, Heerenveen announced that the option in his contract would be triggered, keeping him at the club until June 2013. Valpoort was officially added to the Heerenveen first team in January 2012, after joining on a training camp to Portugal. During the training camp, he made two appearances in
friendlies against
Hannover 96 and
Bayer Leverkusen. After the training camp, Valpoort made four more appearances in the Eredivisie that season and one more in the KNVB Cup, where he failed to score. In the summer break, he appeared in the
UEFA Europa League matches against Norwegian club
Molde, where he scored a consolation goal in the return leg to make it 2–1. Heerenveen was eliminated based on goal difference. After a first half of the season in the 2012–13 season, in which Valpoort made five appearances, he was sent on a six-month loan deal to
PEC Zwolle.
Loan to PEC Zwolle Moving to PEC Zwolle in January indicated a new beginning for Valpoort. However, he was immediately benched for the first two matches. After his debut for Zwolle against
Feyenoord, he was benched again. On 2 March, Valpoort made his debut in the starting lineup against
Willem II due to an injury to
Furdjel Narsingh. In that game, Valpoort made his first goal in the Eredivisie in the 57th minute on a pass from
Denni Avdić.
Ferencváros After his contract was not extended at Heerenveen, he trialled with Hungarian club
Ferencváros in June 2013. After a successful trial, he signed a contract on 27 June with the club, coached by fellow Dutchman
Ricardo Moniz. After the resignation of Moniz, he was demoted to the club's second team together with fellow countrymen
Jack Tuijp and
Mark Otten.
Later career Valpoort signed a two-year contract with
RKC Waalwijk in July 2014 after a successful trial. In February 2016, he signed a multi-year contract with
Beitar Jerusalem. Valpoort scored his first ever goal for
Beitar Jerusalem in an
Israeli Premier League match against
Maccabi Haifa. In January 2017, Valpoort signed a one-and-a-half-year deal with
Almere City. In June 2018, he moved to South Korean
K League 2 club
Busan IPark together with fellow Dutch player
Sherjill Mac-Donald. After the club failed to win promotion to the top-tier
K-League, Valpoort left and signed a two-and-a-half-year contract with
Roeselare in the
Belgian First Division B on 28 January 2019. On 1 September 2019, Valpoort signed a one-year contract with
Excelsior, reuniting him with his former coach, Ricardo Moniz. He made five league appearances at the club. After becoming a free agent, he moved to
FC Dordrecht. On 7 January 2021, Valpoort moved to
Ermis Aradippou in the
Cypriot First Division. On 14 August 2021, he signed with Albanian champions
Teuta Durrës. His spell at the club lasted only two weeks, as the technical staff were not satisfied with his performances. After his contract was terminated by mutual agreement, he joined league rivals
Egnatia. In 2022, Valpoort moved to Indonesian club
Persebaya Surabaya where he also disappointed with only one goal in 11 appearances. He left the club again in April 2022. In September 2022, Valpoort joined newly promoted
Bulgarian first division club
Hebar Pazardzhik. ==International career==