The 19-year-old Maza, who has become a key figure for Hertha despite their struggles, made 30 appearances this season, registering five goals and five assists.
His performances have not gone unnoticed, and with Hertha Berlin facing another year outside the Bundesliga, Leverkusen seized the opportunity to activate his release clause.
The Algerian international completed his medical at the BayArena over the weekend before signing a five-year contract that will keep him at the club until the summer of 2030.
The move is seen as a significant step in Maza's development, especially under the guidance of head coach Xabi Alonso, who has transformed Leverkusen into one of the most dynamic sides in Europe.
Speaking after his unveiling, Maza expressed his excitement at joining a club with continental ambitions.
"I want to prove myself on the big stage at a top European club. I'm really looking forward to Bayer 04, to the special close-knit atmosphere, and to a team that has impressed me greatly in recent years. Here in Leverkusen, I can continue to develop and win titles - that's what drives me," the midfielder told the club's media.
Leverkusen have already qualified for next season's UEFA Champions League, giving Maza the perfect platform to showcase his abilities at the highest level of club football.
Victor Boniface's uncertain situation at Bayer Leverkusen has taken another intriguing turn after the Nigerian striker wiped his Instagram account and posted a cryptic message thanking God for standing by him.
Algeria have revealed Brahim Hemdani as the new head coach of the national team ahead of the upcoming 2027 Africa Cup of Nations qualifiers this month.
We take a look at all the action from the Bundesliga this Saturday following plenty of goals, surprise results and dramatic comebacks.
Algeria have secured the international allegiance of Yanis Senhadji, with the young forward turning his back on Spain despite previously rejecting an approach from the North African country.
