Dmitrii Kalashnikov began postgraduate studies at the Royal College of Music, London, in 2018, in the class of Professor Vanessa Latarche as a Ruth West Scholar, supported by the Neville Wathen Scholarship, and more recently as a Blüthner Pianos scholar. His earlier studies began at the age of five at the Moscow secondary special music school named after Gnessin, in the classes of Ada Traub and Tatyana Vorobieva. In 2017, he graduated with honours from the Moscow State Conservatory P I Tchaikovsky, where he was taught by Professor Elena Kuznetsova.

His prizes have included the Queen Elizabeth the Queen Mother Rosebowl at the RCM, awarded to a student of distinction, the winner of the 2019 final of the Jacques Samuel Intercollegiate Piano Competition (London), and, in the same year, the first prize at Les Etoiles Du Piano International Piano Competition (France). In 2021, he won first prize in the Junior Intercollegiate Piano Competition (Beethoven Piano Society of Europe).

Dmitrii performs regularly with the Russian National Orchestra under the direction of Mikhail Pletnev. In December 2014, Mikhail Pletnev and Dmitrii Kalashnikov gave a two-piano recital in the Great Hall of the Moscow State Conservatory.

Dmitrii graduated from the Royal College of Music in 2021 with distinction, and the University of Music and Performing Arts (Vienna) in 2022, under the guidance of Professor Anna Malikova. In July, he participated in the Lille's piano festival in Louvre 2 (France), and a concert in the Wigmore Hall, London. Additionally, he had performances in the USA in 2022.

More recently, in May 2022, he played the accompanying concert in the presence of HRH Prince Charles, now HM King Charles III, following the annual awards ceremony at the Royal College of Music in London.