After having studied two years on a professional undergraduate degree, a versatile Finn musician Luukas Hiltunen graduated from the Lahti Conservatory of music on 30th May 2018. He graduated from Tampere University of Applied Sciences on 14th June 2023 with a Bachelor of Music Pedagogy degree.

In March 2021 he signed a contract with the Viennese music publisher Universal Edition AG. On 29th July 2023 he was selected by the Mikkeli Music Festival as the young artist (composer) of the year, resulting a cooperation for the opening concert at the 2024 Festival.

On 20th March 2019 was given the world premiere performance of his meditative composition Do not let your hearts be troubled for soprano and chamber orchestra at the Church of the Cross (Ristinkirkko), Lahti, Finland, conducted by the composer. Around the same time he was commissioned by the Lahti Conservatory to prepare arrangements for string orchestra and harp of Jules Massenet's Méditation from Thaïs and Pietro Mascagni's Intermezzo from Cavalleria rusticana; the world premiere performances took place on 12th February 2020 at the Felix Krohn Hall, Lahti Concert House, performed by the New Lahti Chamber Orchestra.

His arrangement for soprano, string orchestra and harpsichord (ad lib.) of W.A. Mozart's aria Una donna a quindici anni from Così fan tutte (K. 588) was premiered in the same venue on 9th April, 2019. Dated for Spring 2019 is also his 15-minute fantasie de concert Conversion for piano, a musical description on the conversion of Paul the Apostle on the road to the city of Damascus. The work received its world premiere performance on 28th November 2022 in the Small Auditorium of Tampere Hall, Finland, performed by the pianist Ville Hautakangas.

Symphony No. 1 in three movements for full orchestra was composed between 22th February 2019 – 26th June 2020 and String Quartet No. 1 in four movements, subtitled as A tale of two lovers, a reference to William Shakespeare’s Romeo and Juliet tragedy, between 27th September 2021 – 7th May 2022. Symphony No. 1 received its world premiere on 18th April 2022 in the Järvenpää Hall performed by Sinfonia Vivo under the baton of its Artistic Director conductor Erkki Lasonpalo. String Quartet No. 1 was premiered on 25th November 2022 in Tampere in Haihara Art Centre performed by the Pirkanmaa-based String Quartet ILME.

On 13th October 2022 was given the world premiere performances of his reduced versions of Pyotr Tchaikovsky's Dance of the Sugar Plum Fairy and Waltz of the Snowflakes from The Nutcracker in Korundi House of Culture, Rovaniemi, by Chamber Orchestra of Lapland in cooperation with Lapland Music and Dance Institute. Further performances of Waltz of the Snowflakes are taking place on 14th and 15th December 2023 by Saimaa Sinfonietta at the Christmas concerts in Lappeenranta and Mikkeli respectively under the baton of Erkki Lasonpalo.

On 11th September 2023 Chamber Orchestra of Lapland gave the world premiere performance of his reduced version of Gioachino Rossini’s Overture to The Barber of Seville at the Levi Summit, Kittilä, Finland, commissioned by the orchestra. A subsequent performance took place on on 15th September 2023 in Tromsø Cathedral, Tromsø, Norway.

In 2019 Edition Wilhelm Hansen Copenhagen published his arrangement for String Quartet of Jean Sibelius's Scene d'Amour, Op. 71, originally written for violin and piano (WH33255). The arrangement has been performed many times, for instance on 1st May 2021 by Chamber Orchestra of Lapland in Korundi House of Culture, Rovaniemi, on 26th July 2021 by Kamus Quartet at Meidän Festivaali/Our Festival at Ainola in Järvenpää, on 4th September 2022 by Utu Quartet at the birthplace of Jean Sibelius in Hämeenlinna and on 7th September 2022 by Utu Quartet at the Town Hall, Hämeenlinna.

In June 2023 Edition Wilhelm Hansen published his arrangement for chamber ensemble of Sibelius’s The Tempest Suite, Op. 109 (WH33640), commissioned by the Ruovesi Chamber Music Festival. The world premiere performance took place on 2nd July 2023 at the Sofia Magdalena Church, Ruovesi, performed by the Festival Ensemble.

Since Autumn of 2017 he has been the member at the Association of Finnish Sheet Music Engravers (Suomen nuottigraafikot ry.) and from August of 2020 at the Association of Finnish Musicians' Union (Suomen Muusikkojen Liitto).