Bettamer began his career in the youth team at London Tigers, where he made his senior debut. In 2010 he joined Watford on a one-year scholarship but was not offered a professional contract. He then returned to London Tigers before joining Hayes &amp; Yeading United, making his debut in November 2011..Bettamer was unable to hold down a first team spot with the Conference Premier side and joined Bedfont Town on loan before being released in March 2012. He then spent the remainder of the season with North Greenford United. He played with Hampton &amp; Richmond Borough in 2012–13, before trials at Dagenham &amp; Redbridge, and Maidenhead United. He then joined Al-Ahly (Benghazi) in Libya on a three-year contract, with whom he reached the quarter-finals of the CAF Champions League. Due to the ongoing civil war in Libya, leading to the suspension of the domestic league in the country, he was unable to play during the final two years of his contract. After it expired, he then joined Staines Town, with whom he scored 42 goals in 89 games. He signed a pre-contract agreement with Stevenage in the summer of 2018, but with no contract on the table he joined Braintree Town on a non-contract basis, before a move to Salford City fell through.