Issiaga began using the Tonsser app to track his stats and share videos of his performances. This opened doors for the talented midfielder, allowing him to showcase his skills to a broader audience and gain visibility in competitive football.

Issiaga’s talent was recognized as he was chosen to represent Tonsser United. He was named captain of the team during the Vinci Cup, where they faced elite clubs like Juventus and PSG. His leadership and performances on the field against world-class youth sides made him a standout player in the tournament.

Issiaga’s journey took a significant step forward when he joined OGC Nice’s senior team. He made his first appearance in a friendly match, marking an important milestone as he began integrating into the professional setup of Ligue 1 football.

Issiaga achieved a dream by making his official Ligue 1 debut in the opening game of the 2024–25 season for OGC Nice, proving he could compete at the highest level of French football.

Eligible to represent Guinea, Issiaga made his debut for the Guinea U23 national team. He further cemented his international reputation by representing Guinea in the 2024 Summer Olympics, playing in two of the group stage matches.