Born in
Leiden, Helder played for
Sparta Rotterdam and
Vitesse Arnhem of the Eredivisie before joining
Arsenal on 14 February 1995. He made his debut for
Arsenal in a 1–0 home win against
Nottingham Forest on 21 February 1995. Helder was the final signing made by Arsenal's then manager
George Graham, who left a week after Helder's arrival. Helder made 27 league appearances for Arsenal, plus 12 as a substitute, and scored a solo goal for the club in a 3–2 win over
Middlesbrough. Helder then moved to
NAC Breda in his native
Netherlands and, after a short spell there, he went to play in China for
Dalian Wanda FC. Soon afterwards he returned to
Breda for a second spell at the club before moving on to
MTK Hungária FC of
Hungary. He then returned home to trial with
FC Dordrecht, which proved to be unfruitful. Helder eventually signed for
RBC Roosendaal in 2000 and two years later moved to
TOP Oss. He retired one year later. ==International career==