The Berlin-based company, whose customers are disproportionately women, said it was aiming for a balanced representation of women and men in its top six management levels by 2023 and was also paying attention to non-binary genders.

"During the past 11 years, we have been very focused on establishing and growing our business, and we didn’t put enough effort into countering structural imbalances that have evolved," co-Chief Executive Rubin Ritter said in a statement.

To help it reach the goal, Zalando said it would make changes to its decision-making bodies and committees, change hiring practices and work on succession planning.

Germany has long been a laggard in promoting women to senior positions in the business world: women account for only 9% of management board positions in the top 200 companies, according to the DIW Berlin economic institute.

Germany passed legislation in 2015 demanding that women hold 30% of the seats on supervisory boards of large companies. There is no quota for management boards, but some politicians have threatened to impose one here too if progress is not made soon.

"The fact that Zalando has recognised the importance of gender diversity in management and has set its own targets is very encouraging," said Katharina Wrohlich, head of the gender economics research group at DIW Berlin.

Jennifer Morgan became the first female head of a German blue-chip company last week as co-CEO of software company SAP. Ailing conglomerate Thyssenkrupp, which has just been relegated from the benchmark DAX index, appointed Martina Merz as interim CEO last month.

Zalando is currently run by a management board of five men, while it has three women out of nine people on its supervisory board - including chairwoman Cristina Stenbeck - and 29% of senior vice presidents are women.

(Reporting by Emma Thomasson; Editing by Mark Potter)