Career
Joronen made his senior début for Finland in 2013. Born and raised in the small town of Simpele located near the Russian border, Joronen joined Fulham Academy in 2009. In June 2010, Joronen signed his first professional contract with the club, which will keep him until 2013.
In May 2012, Joronen signed a two-year extension with Fulham, that will keep him until 2014.
Six month later, on 25 October 2012, Joronen joined Maidenhead United on loan and in February 2013, Joronen was loaned to Cambridge United. Only a day later Joronen returned to Fulham after he refused to be named as a substitute for Cambridge.
After a loan spell at Maidenhead United, Joronen then move back to Finland, where he joined Veikkausliiga side Football Club Lahti on loan until August. At the start of the 2014-2015 season, Joronen signed a two-year contract with the club that kept him until 2016.
He was then given his debut as the starting goalkeeper in Fulham"s opening game in the Championship against Ipswich Town on 9 August 2014.
After making three more appearance for the club, Joronen soon lost his first team place to Marcus Bettinelli and new goalkeeper signing, Gábor Király. Joronen joined Accrington Stanley on loan for one month on 17 October 2014, but he returned early after dislocating his kneecap during a League Two match against Morecambe. Then, it was announced that Joronen would be out for three to four months.
In August 2015, Joronen signed for Stevenage on loan until January 2016.
Joronen scored with a long-range clearance in a match against Wycombe Wanderers on 17 October 2015. Having represented Finland at U17, U19 and U21 level, Joronen was called up to the senior squad and made his debut for Finland in the 2013 King"s Cup against Thailand on 24 January 2013.