Kontopoulos became active in the music industry in 1999–2000. The song titled 'This is our night' got the most votes and thus represented Greece at the Eurovision Song Contest 2009, which took place in Moscow. After the results of the jury and the tele-voting were announced, the song was placed seventh on the final scoreboard. In 2010 he released a new song for Sakis Rouvas titled 'Spase ton hrono'. The song topped the Greek charts for months. In March 2010 Kontopoulos became a member of the jury of the
Greek Idol show. In September 2010 Kontopoulos released the new song of Sakis Rouvas called 'Parafora'. The song was in the number one spot of the National Airplay Chart for weeks. In December of the same year Kontopoulos released the ballad 'Einai stigmes', performed by Antonis Remos. In February 2011 Sakis Rouvas released his new song 'Oi dyo mas' by Kontopoulos. In March the song topped the National Airplay chart becoming the 6th song of the duo Kontopoulos/Rouvas that topped the charts. In September 2011, the three top Greek male artists released songs of Dimitris Kontopoulos: Antonis Remos released as a single the song "Tora Epizo", Sakis Rouvas the song "Kane na mi sagapiso" and Michalis Hatzigiannis performed the song "Axizo" of the movie "Loufa kai parallagi: Seirines stun Steria". In summer 2012 Kontopoulos composed the song "Poses hiliades kalokairia" sung by
Demy.In December 2012 Michalis Hatzigiannis and hip hop artist Midenistis performed the song of Kontopoulos "Se ena toixo" which remained for 15 weeks at the first place of the National Airplay chart. In January 2013 Dimitris Kontopoulos composed the song "H agapi erxete sto telos" for the advertisement of Lacta chocolate, the song was performed by Antonis Remos stayed for 4 months on the second place of the national airplay chart while the advertisement won 3 Cannes Lions awards as the best advertisement of the decade. In December 2013 Helena Paparizou released his song "Iroas" that entered the top 10 National Airplay chart for 4 weeks while a week later one of the most popular Greek artists Despina Vandi released his song "Hano esena". The song remained at the first place of the Greek airplay chart for 11 weeks. In February 2014 it was announced that Kontopoulos will be the mentor of Vandi at the Greek edition of the Voice TV show. In May 2013 Dimitris Kontopoulos participated at the Eurovision Song Contest with Azerbaijan. His song "Hold me" performed by Farid Mammadov came second with 234 points, the most points that Azerbaijan has ever received at the Eurovision Song Contest.While it received the maximum 12 points from 10 countries.Kontopoulos is one of the two composers of the song "
Shine" of
The Tolmachevy Sisters which took part in the
Eurovision Song Contest 2014 for
Russia. In May 2016 Dimitris Kontopoulos participated at the Eurovision Song Contest with Russia. His song "You're the only one" performed by
Sergey Lazarev came third with 491 points, despite winning the televote. In 2017, he was the composer for
Demy and
Greece in the Eurovision Song Contest 2017. He composed three songs: "Where the time comes around", "Angels", and "This is love" which were voted on at the national final in March 2017. The song titled "This is love" got the most votes and thus represented Greece at the Eurovision Song Contest 2017, which took place in Kyiv. After the results of the jury and the tele-voting were announced, the song was placed 19th on the final, the second-worst result that Kontopoulos has ever had at the Eurovision Song Contest as composer. He got his worst result
2018 with the song "
X my heart" by
Aisel Məmmədova which became 11th in the first semi final and did not qualify. In the
Eurovision Song Contest 2019 he was more successful with a 3rd place in the grand final for the song
Scream by
Sergey Lazarev. In
2020 he won the Moldovian pre-selection
O melodie pentru Europa for the Eurovision Song Contest 2020 with the song
Prison by
Natalia Gordienko. He also wrote the song "
SUPERG!RL" for the Greek singer
Stefania. Because of the COVID-19 pandemic the contest was cancelled and the songs did not compete on stage. For the
Eurovision Song Contest 2021 he wrote the songs "
Sugar" for Natalia Gordienko () and "
Last dance" for Stefania (). Both qualified for the Grand final and "Sugar" became 13th, "Last dance" 10th, the first Top-10 position for Greece since 2013. He was chosen to write the for the
Eurovision Song Contest 2024, == Copyright controversies ==