Taxiarchis Fountas

AEK Athens

Taxiarchis Fountas was scouted by Toni Savevski, the head of AEK Athens's youth academy at the time. On 17 March 2012. Fountas made his senior debut for AEK Athens against Asteras Tripoli being the youngest player to play for AEK Athens in a Superleague game aged 16 years 6 months and 13 days old. He played 31 minutes in this game. He made his first start for the club on 22 April on the final day of the 2011-2012 regular season against Doxa Drama, completing the whole 90 minutes.

Fountas scored his first goal for the club in a 1-0 win against Platanias on 28 October 2012, thus becoming the youngest player to score for AEK at the age of 17 years and 54 days. He scored another goal against Veria on 18 October 2012 and another one against Pas Giannina on 3 November 2012. He was also awarded the MVP award after this match. He scored his 4th goal again against Veria on 16 March 2013 with a fine left foot shoot. When the club was relegated, the player was released. He also scored a snipe against Everton in a friendly match in the summer of 2012.

Red Bull Salzburg

Reports stating that the Greek international Taxiarhis Fountas is under contract with Red Bull Salzburg. "We have indeed longer employed with him, but there is still no enforcement," said Salzburg motorsport boss Ralf Rangnick. The 17-year-old attacking midfielder played for AEK Athens. The Greek club is currently on the verge of financial collapse. No one knows at present how it goes at AEK Athens, and thus is complicates the transfer. Whether the Greek youth team player who already dwells in Salzburg, will ride on Friday training camp in Germany, should decide at short notice. Eventually on September 2013, Fountas had joined the club on a four-year contract. After the signing of his contract, the club decided to play on loan for six months for Liefering in Austrian Football First League.

Fountas comes on loan to Grödig until end of season from local rivals Red Bull Salzburg. The 18-year-old midfielder has at the current standings in the Austrian Football Bundesliga on a contract until the summer of 2017. Fountas succeeded to make his first appearance in Bundesliga a week later.

On the beginning of the 2014/15 season, he comes on loan to Panionios, returning to the Greek Super League. Fountas exceptional season with Panionios made Asteras Tripoli to start discussions with Red Bull Salzburg for obtain him on loan, with a buying option if the young player convince with his appearances. The Greek striker will play for Asteras Tripoli on loan from Red Bull Salzburg and is expected to have a duration of two years which clearly wanted and the player's side. On 2 January 2016, he scored his first goal with the club to a comfortable 4-0 home win against Panthrakikos. On 5 January 2015, few days after his first goal with his club in Super League, he scored an amazing goal in a 3-0 away win against Larissa for Greek Cup.

Panionios

On 21 July 2016, winger Taxiarchis Fountas, who was recently released from Asteras Tripolis, signed a one (plus one) year contract and officially returned to Panionios. On 1 July 2017, under mutual agreement Panionios solved the player's contract.

SG Sonnenhof Großaspach

On 20 September 2017, as a free agent, signed a long season contract with German club SG Sonnenhof Großaspach.

International career

Fountas made his international debut for Greece on 13 June 2015,against Faroe Islands where in one of the worst nights of Greek international football, Faroe Islands beat Greece for the second time for the preliminary round of UEFA Euro 2016. He came in the match on 81 minute replacing Panagiotis Kone.