Atiku was a member of a Ghana U17 squad that also featured Michael Essien, and after their performances at the 1999 FIFA U-17 World Championship, they went on trial with English club Manchester United in April 2000. Both players were offered contracts by the club, but they were unable to obtain work permits, and the move fell through. Atiku ended up joining Liberty Professionals in 2000, and in 2001 he made his first transfer away from Ghana as he was taken on loan by Israeli club Hapoel Petah Tikva. until the end of that season and played one game in the UEFA Intertoto Cup with Hakoah Amidar Ramat Gan. His loan ended and returned to Liberty, but his performances had already attracted Swedish club Västerås which signed him in 2003. His next move was to Friska Viljor in 2005, and later played with Assyriska for first time in his career to Allsvenskan League, where he had two full seasons with 48 caps and was considered a key-member of the squad. In April 2007, Atiku decided to separate parts and signed a six-month loan deal with rivals Assyriska at Superettan club IF Sylvia. It was reported that Botev Plovdiv were interested in signing him and that Cypriot club APEP had offered him a three-year deal contract that he refused in order to take a chance with Scottish Premier League side Inverness Caledonian Thistle. However, this move fell through and finally on 7 January 2009, Atiku joined Vasalund on a two-year contract. Searching for a way to leave Sweden after many years of services, it was then that Greek historical club Ethnikos Piraeus signed Atiku on a two-year deal in order to help them win promotion to Superleague Greece and went very close on this but financial problems bankrupted the club at the end of the season. Greek courts decided Ethnikos should pay €28,000 to Atiku due to his contract regulations but this decision failed to come through as the club went from professional to amateur and all its debts were erased. On 11 July 2011, Atiku joined English club Swindon Town on a two-year contract following full preseason and play in all friendly games before league started. Following his move, Atiku was given a number 16 shirt for the club and appeared only in reserve team. On 28 October and after his refuse to join Newport Country on loan Swindon cancelled his contract at The County Ground by mutual consent after failing to break into the first team with Atiku making a statement that he has no regrets after Swindon exit.
