Jannis Bartens plays beach volleyball for GfL Hannover and competes in the federation “Nordwestdeutscher Volleyball-Verband”.
Currently listed in NWVV U13 männlich 2026 (rank 17, 252 points); NWVV U14 männlich 2026 (rank 38, 96 points); NWVV U12 männlich 2026 (rank 53, 11 points). 2 tournament results are documented from 2025. Most recently documented: place 4 at Sonstige (Aug 23, 2025). Most frequent partners in the results: Ethan Beckedorf, Frederik Tippenhauer.