Born in Valencia, Juanma only played lower league football in his country, starting out at FC Jove Español San Vicente in Tercera División. He then moved to Segunda División B, where he represented CD Dénia and Deportivo Alavés; he scored and was sent off – after having already been replaced – in his competitive for the latter on 17 October 2012, a 2–1 away win against Huracán Valencia CF for the season's Copa del Rey. In the summer of 2013, Juanma joined Greek club Asteras Tripoli FC. He played his first game as a professional on 15 September of that year, featuring six minutes in a 1–1 Superleague draw at OFI Crete FC. His first goal came on 12 January 2014, when he contributed to a 3–0 home win over Platanias FC. After featuring in 36 games all competitions comprised and leaving by mutual consent, Juanma spent the 2014–15 campaign with fellow league side Kalloni FC. He scored his first goal for his new team on 9 November 2014, in a 2–0 away win over Panionios FC. He netted twice on 9 February of the following year, helping to a 2–2 home draw against Skoda Xanthi F.C. and an eventual 11th-place finish; subsequently, he signed a new contract. Juanma signed for Heart of Midlothian on a three-year deal in June 2015, with Kalloni being entitled to 20% of any future transfer. On 2 August, in his Scottish Premiership debut, he capitalised on a Brad McKay mistake to score the opener at home against St Johnstone, in an eventual 4–3 win. Six days later, in a 2–1 success at Dundee, he netted twice in five minutes, starting with a penalty; on 19 December, against the same opponent, he received a straight red card in a goalless draw for headbutting David Wotherspoon, and manager Robbie Neilson attributed it to frustration at Scottish referees being more lenient on fouls against strikers than their Spanish counterparts. On 31 August 2016, Juanma was loaned to UCAM Murcia CF for one year, making his professional debut in the Spanish league system on 21 September when he came on as a 35th-minute substitute and scored once in a 4–0 home win over UD Almería for the Segunda División. In January 2017, however, he agreed to a permanent contract with Japanese club V-Varen Nagasaki.
