Representing Poland, ja is active in the Age of Empires II scene. ja brings the experience of 44 played matches to each game. Most of ja's games take place on the ranked random map 1v1 ladder.

ja has the highest win rate in the pocket position: 66.7% over 3 games. ja has reached a rating of 384 in RM 1v1. ja wins 23.1% of the time in RM 1v1 after 39 matches.