Einer grew up in Tallinn, hand-making her first collection at twelve and learning to sew, crochet and embroider with her grandmother, before a foundation at Central Saint Martins and a fashion degree at the University of Westminster. At sixteen she was already working as an embroidery assistant at Balmain alongside Olivier Rousteing, and has also worked for Alexander McQueen.
She won the inaugural Saks Emerging Designer Showcase in 2017 and was invited to present at London Fashion Week a year after founding her own brand — bypassing the usual three-year wait. Her Spring 2019 collection was featured in full in Vogue, her clothes have been worn by Rihanna, Dua Lipa and Lady Gaga, and in 2020 she made the Forbes 30 Under 30 list.