David Flakus Bosilj (born 1 February 2002) is a Slovenian professional footballer who plays as a striker for Spanish club Murcia.
Flakus Bosilj began his football career with Pobreà ¾je in his hometown Maribor. In 2015, aged 13, he moved to the youth academy of MaleÃÂnik, where he progressed through youth age groups until the 2016âÂÂ17 season. During the winter break of the 2016âÂÂ17 season, Flakus Bosilj joined the youth department of Aluminij. His consistent performances in the youth teams led to his inclusion in the senior squad in late 2018 by head coach Oliver Bogatinov.
On 10 May 2019, Flakus Bosilj made his professional debut in a 3âÂÂ0 away loss against Rudar Velenje, where he replaced Luka à  tor in the 78th minute.
In the 2019âÂÂ20 season, he became a regular on the first-team bench, making brief appearances. He scored his first goals during an 8âÂÂ1 victory over Triglav Kranj on 4 December 2019. After the COVID-19 lockdown, he became a regular starter, concluding the season with 16 league appearances and contributing to his team's fifth-place finish.
On 20 August 2021, Flakus Bosilj signed with Serie A club Hellas Verona and joined their youth team.
On 31 August 2022, a loan agreement was officially announced with Slovenian club Bravo. He made his debut for the club on 5 September against Radomlje, entering the match as a substitute for Luka à  tor in the 66th minute of a 1âÂÂ1 league draw.
Flakus Bosilj was sent on a season-long loan with an option to buy to De Graafschap on 11 August 2023. He scored on his debut for the club on 21 August, helping the Superboeren to a 2âÂÂ1 victory against Jong Ajax.
On 21 August 2024, Flakus Bosilj signed a two-year contract with Spanish Segunda División side Castellón.
In January 2025, after being rarely used, he moved to Primera Federación club Murcia on loan for the remainder of the 2024âÂÂ25 season. On 31 August, he signed a permanent contract with the club.