Born in Santa Lucía de Tirajana, Canary Islands, Mandi made his debut as a senior with UD Vecindario in 2007.

[6] After again winning promotion to the second tier, he moved to Sporting de Gijón on 22 June 2012 after agreeing to a four-year deal.

[13] He scored his first goal in the A-League on 24 November, with a long-range half-volley to open a 3–1 home loss against Adelaide United FC.

[14] Mandi joined Indian Super League franchise ATK on 16 December 2019, as a replacement for the injured Carl McHugh.

[15] After contributing eight starts as they were crowned champions,[16] he returned to his country's division three with Unionistas de Salamanca CF.