Senior Data Scientist (Search & Recommendations)

Get to Know the Team You will join our Search and Recommendations team — join a group of machine learning engineers and data scientists who build the algorithms that help millions of users discover food, groceries, and services across Southeast Asia. We work with engineering, product, and business teams to turn data into features that directly impact how users navigate our platform. Get to Know the Role You will report into the Senior Data Science Manager, and work onsite at Grab One North Singapore office. You will design and build machine learning systems that power search ranking and personalized recommendations at scale. Your work will span deep learning model development, LLM integration, and production deployment. You will measure your impact through offline evaluation metrics and online A/B test results that directly affect user engagement and business metrics. The Critical Tasks You will Perform You will design and implement deep learning algorithms for search ranking, session-based recommendations, and multi-objective personalization systems that serve millions of users daily. You will fine-tune and deploy Large Language Models (LLMs) to improve search query understanding and recommendation relevance. You will lead offline evaluation design and online A/B testing to validate model performance, ensuring measurable improvements to user engagement before production release. You will partner with software engineers to scale your models from prototype to production, including model serving optimization and latency requirements. You will translate data insights into concrete product features by collaborating with product managers and business operations teams, defining requirements based on user behaviour analysis. You will monitor model performance in production and implement retraining pipelines to maintain prediction quality as data patterns evolve.