Iontton joined Stevenage at the age of ten and progressed through the club's youth academy.[4] He signed a pre-scholarship contract aged 14 after impressing academy coach Darren Sarll.[4] He captained the club's under-16 team and played several times for the under-18 team during the 2016–17 season,[4] subsequently signing a two-year academy scholarship with the Hertfordshire club on 22 June 2017.[4] Whilst a first-year scholar, he made his first-team debut for Stevenage in the club's 3–1 League Two victory against Exeter City at Broadhall Way on 28 April 2018, coming on as an 18th-minute substitute in the match.[5] He signed his first professional contract with Stevenage on 20 July 2018.[6] Iontton was named as League Two Apprentice of the Year for the 2018–19 season at the EFL Awards ceremony on 26 March 2019.[7] He scored his first professional goal in Stevenage's 3–0 home victory against Carlisle United on 13 April 2019.[8] Iontton made 21 appearances during the season, scoring once.[9]
Having made 11 appearances for Stevenage during the first half of the 2019–20 season,[10] Iontton joined National League South club Braintree Town on a one-month loan agreement on 24 February 2020.[11] He made four appearances during the loan spell.[2] He made four appearances for Stevenage during the 2020–21 season, before being released by the club in May 2021.[12]
King's Lynn Town
Having been a free agent during the opening months of the 2021–22 season, Iontton joined National League club King's Lynn Town on 18 November 2021, signing a contract until the end of the season.[13] Iontton made three appearances during his time at King's Lynn and was released at the end of the 2021–22 season following the club's relegation.[14][15]
Hendon
Despite initially signing for National League South club Hampton & Richmond Borough on 25 May 2022,[16] Iontton joined Southern League Premier Division South club Hendon on 3 August 2022 before the start of the 2022–23 season.[17] He debuted for the club in a 1–0 home defeat to Yate Town on 6 August 2022.[18] Iontton played 44 times during the season, scoring one goal in a 5–1 away victory against Potton United in the FA Cup.[18]