Juncadella began his motorsport career in karting in 2004, finishing 21st in the Copa Campeones Trophy Junior. He also finished 32nd in the Andrea Margutti Trophy ICA Junior class.
Master Junior Formula
Juncadella began his formula racing career in the 2007 Master Junior Formula season. He finished as runner-up in the championship, with seven wins and 359 points; losing out to Isaac Lopez by nine points.
Formula BMW
After six races at the end of the 2007 Formula BMW ADAC season, the following season, Juncadella competed in the new-for-2008 Formula BMW Europe series for EuroInternational. He finished fourth in the standings, taking thirteen points-scoring positions in sixteen races, including two wins at the Hungaroring.[1] For 2009, Juncadella remained in the series, staying with EuroInternational. He finished as runner-up behind Brazilian team-mate Felipe Nasr in the championship with one win at Monza Circuit.[2] Juncadella finished every race in the points, but was not enough to keep his backing from the Red Bull Junior Team.
He tested with Williams F1 during the Young Drivers test at Silverstone, setting the fifth best time on the first day.[3]
On 24 January 2014, Juncadella joined Force India as a reserve driver. He attended all races and took part in Friday practice sessions.[4]
In December 2024, Juncadella joined Aston Martin (the successor of Force India) as a simulation driver for the 2025 season.[5]
Sportscar career
DTM
For the 2013 season, Juncadella raced with Mercedes in the DTM. Following three seasons with Mücke Motorsport, the Spaniard left the series for a year to race for AKKA ASP in the Blancpain GT Series Endurance Cup and Sprint Cup championships. Juncadella returned to the DTM in 2018, where he scored three pole positions and two podiums, including a victory at Brands Hatch, on his way to 15th in the standings.[6] The following year, Juncadella joined the Aston Martin Vantage DTM project with R-Motorsport, and although he beat teammates Paul di Resta, Jake Dennis, and Ferdinand Habsburg in the overall classifications, the Spanish driver only finished 14th in points.[7]
In 2021, Juncadella returned after a year of absence to pilot GruppeM Racing's Mercedes during the series's first season under GT3 regulations.[8] He was able to finish in the points more often than not, which yielded ninth position in the standings with one podium at the Nürburgring.
The 2023 season saw Juncadella compete for WeatherTech Racing in the GTD Pro category of the IMSA SportsCar Championship, where he paired up with Jules Gounon.[14] Together with Maro Engel, the duo shone at the designated endurance races, winning their class at the 24 Hours of Daytona as well as at the season-ending Petit Le Mans race, wins which helped them towards a Michelin Endurance Cup title.[15][16] Two further wins in sprint events helped them towards second place in the overall classification, as Lexus's Jack Hawksworth and Ben Barnicoat dominated the year.