He is on the books of FC Lokomotive Leipzig and wears shirt number 4. His main role on the pitch is Defender. His stronger foot is Right. His estimated market valuation currently stands at 100K €.

His latest transfer saw him join FC Lokomotive Leipzig from Viktoria Aschaffenburg via on 2025-07-01.

Across the German Regionalliga 2025-2026, J. Stein appeared in 18 matches and averaged 0 tackles, 0 interceptions, 0 clearances, and 0 blocked shots per game.