Spinelli began racing in karts, and saw success in the early 2010s, including winning the KF2 World Cup in 2011.

In 2015, Spinelli made the transition to car racing, competing in the Lamborghini Super Trofeo series. Spinelli won the Super Trofeo European championship in the Pro class in 2017 and in 2022, while also collecting Pro-Am class championships in 2015 and 2018 and winning several races in the North American championship.

In 2022, Spinelli began to compete in the United States, initially joining the GT World Challenge America series before finding a full-time ride in the IMSA SportsCar Championship for 2023 with Forte Racing. For 2024, Spinelli was announced as an official factory driver for Lamborghini for the manufacturer’s GT3 racing program.