Date of birth
Koiki started his career in the youth system at Crystal Palace before being spotted by Burnley playing local football in Croydon.
The defender joined the Clarets in July, 2016 before signing a new 12-month deal in July, 2017 after moving up to the Development Squad.
A regular at left-back for the under-23s in 2017/18, Koiki was rewarded with a first professional contract at the end of the season, penning a 12-month deal with a further year's option which was triggered in June, 2019.
Koiki again started the 2018/19 season in the Under-23s and travelled with the first-team squad before joining League Two side Swindon Town in January 2019 on loan until the end of the season.