He was born in Madrid, Spain to Equatorial Guinean parents - his father being a diplomat.

[2] He has a cousin on his mother's side, Javier Balboa, who is a professional footballer, Equatorial Guinea's international player, also born in Madrid.

[3] Nguema has played with several different Spanish clubs in the past, most notably starting his career with Real Madrid, where he obtained the 2006–07 ULEB Cup and the 2006–07 ACB season.

[4] Later, he played for CB Estudiantes, Obradoiro CAB and Cáceres Ciudad del Baloncesto.

[5] He also played in Equatorial Guinea, the original country of his family, for Malabo Kings and The Panthers,[6] and in 2017 he played for Cañeros del Este of Dominican top division Liga Nacional de Baloncesto.