He currently plays for PK-35 Vantaa Women, wearing the number 34 shirt. At the international level, he represents Finland Women U17. He plays primarily as a Defender.

Throughout the UEFA European U17 Women's Championship 2025-2026, Helmi Kupila featured in 3 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.