Sonia Lange Ramontja

Co-founder & CEO @Retapp

Cambridge, GB

Secured technical cofounder and Cambridge-affiliated advisory support. Positioned the company to assist the government and retail brands with e-waste legislation compliance ahead of the 2025–2026 rollout- Collected 764kg of electronics across four pop-up events within just 14 hours, validating strong market demand for an AI-driven e-waste collection with engaging consumer experience- Generated revenue within five months of launch, covering one-third of pilot costs and rising, while acquiring 50+ active beta testers with only £100 spent on marketing- Forged strategic community partnerships via targeted outreach, connecting with local repair networks, educational institutions, and retail partners- Designed a CAPEX-light business model using gig economy solutions and storefront operations to serve the entire city region.

University of Southampton

Bachelor's degree

Lycée International de Saint Germain en Laye

Baccalauréat Option International

University of Cambridge

Executive MBA