About The Role Develop and optimize personalization and recommendation models to deliver relevant offers, merchants, and experiences to GoPay users. Apply a range of DS techniques —such as collaborative filtering, ranking models, embeddings, and graph-based methods to improve discovery and user engagement. Work closely with product and engineering teams to design, test, and deploy end-to-end ML pipelines in production. Prototype rapidly , run A/B tests, and analyze online/offline metrics (CTR, conversion rate, NDCG, , etc.) to evaluate model performance and business impact. Leverage large-scale behavioral and transactional data to uncover insights and guide feature design and personalization strategies. Contribute to continuous improvement by monitoring model performance, identifying data or algorithmic gaps, and iterating based on real-world feedback. Collaborate ...