At international level, he features for Sweden U18. His main role on the pitch is Defender.

His latest transfer saw him join Utsiktens BK from IF Elfsborg U19 via on 2026-03-06.

Across the Sweden Allsvenskan 2025, kasper berndtsson appeared in 1 matches and averaged 0 tackles, 0 interceptions, 0 clearances, and 0 blocked shots per game.