PyData Berlin 2026 October Meetup

The Story

Welcome to the PyData Berlin October meetup! We would like to welcome you all starting from 18:00. There will be food and drinks. The talks begin around 18.30 and the doors will close at 18.30. **Make sure to arrive on time!** If you cannot attend, please cancel your spot so others are able to join as the space is limited. **Host**: **Vinted** is excited to welcome you to this month's version of PyData. We need you to enter your **full name and email** when registering for this event. You will receive a **personal PIN** that you need to enter on the reception tablet upon arrival. Photos may be taken during the event. \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* The Lineup for the evening: **Talk 1: How Vinted taught search to understand what you actually meant** **Abstract**: This talk will be about how we tackled a mismatch in search: what users want for a query and what the results page shows can drift apart. We implemented a small model that predicts what each query is really about (say 90% one type of item and 10% another). We then reorder results so the page reflects that mix, without touching the rest of the search system. In a Vinted A/B test, the items users were looking for gained visibility, engagement increased, and buyer satisfaction stayed healthy. **Speaker:** Beatrice Musizza is a Data Scientist on the Search Relevance team at Vinted in Berlin, where she is the technical owner of the reranker. Her work focuses on large-scale reranking architectures, user modeling, and balancing marketplace discovery with user intent. She recently co-authored and presented research on query-level multinomial blending at the ACM RecSys 2026 OARS Workshop. Outside of work, she holds a judo black belt and is always happy to learn new languages! **Talk 2: TBD** **Lightning talks** There will be slots for 2-3 Lightning Talks (3-5 Minutes for each) between the two main

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