Janssen progressed through the VVV-Venlo youth academy after arriving there from the SV Blerick in 2010.[1] He made his professional debut for the club on his 18th birthday on 25 September 2018 in a 3–0 away win in the KNVB Cup over Westlandia, replacing Tino-Sven Sušić in the 73rd minute.[2] He made his Eredivisie debut three months later in a 4–1 loss to Feyenoord on 6 December 2018, coming off the bench for Evert Linthorst.[3]
On 18 April 2019, Janssen signed a two-year contract with VVV, with an option for an additional year.[4] Three months later he received the Jan Klaassens Award [nl], the yearly award for VVV's best academy player.[5]
VVV exercised the option in Janssen's contract in March 2021, keeping him in Venlo until 2022.[6] On 7 December 2021, he signed a two-year contract extension until 2024, with a unilateral option to extend for a further year.[7] At that point Janssen, originally a midfielder, was converted to play left-back by head coach Jos Luhukay.[7]
On 17 February 2023, Janssen scored his first professional goal, securing VVV's 2–1 away win against Dordrecht in injury time.[8] This came after Dordrecht had earlier equalised during injury time.[9]
Career statistics
As of match played 7 April 2024
Appearances and goals by club, season and competition