Stanislaw Pstrokonski

Stanislaw Pstrokonski is a Senior Data Scientist at Busuu since July 2021, where responsibilities include initial exploration, data modeling, ETLs, model training, model selection, and inference code, all integrated into Python repositories behind an API. Key achievements include the development of a Glicko learner model for grammar, a spaced repetition model for vocabulary, and 3-parameter IRT models paired with a Bayesian Computerised Adaptive Test to enhance the Placement Test, resulting in increased conversion rates. Pstrokonski also created in-house tools for content performance evaluation, an LTV model for business decision-making, and a recommendation system for user interactions. Prior experience as a Data Scientist includes roles at HOLLAND PARK EDUCATION CONSULTANTS LIMITED and Mrs Wordsmith. Pstrokonski holds a Master of Engineering in Chemical Engineering from the University of Cambridge.