Senior Data Scientist - Search & Recommendations

About the role

Grab is hiring a Senior Data Scientist for its Search and Recommendations team, which builds the machine learning algorithms that help millions of users discover food, groceries and services across Southeast Asia. You will report to the Senior Data Science Manager and work onsite at the Grab One North Singapore office, designing and building machine learning systems for search ranking and personalized recommendations, covering deep learning, LLM integration and production deployment.

Key responsibilities

• Design and implement deep learning algorithms for search ranking, session-based recommendations and multi-objective personalization systems serving millions of users daily.
• Fine-tune and deploy Large Language Models (LLMs) to improve search query understanding and recommendation relevance.
• Lead offline evaluation design and online A/B testing to validate model performance before production release.
• Partner with software engineers to scale models from prototype to production, including model serving optimization and latency requirements.
• Translate data insights into product features with product managers and business operations teams, based on user behaviour analysis.
• Monitor model performance in production and run retraining pipelines to keep predictions accurate as data patterns change.

Required profile

• Master's degree in Computer Science, Operations Research, Statistics or an equivalent quantitative field, or equivalent practical experience building production ML systems at scale.
• At least 3 years of experience building and deploying deep learning models for search, recommendation or NLP applications in production.
• Demonstrated experience with A/B testing frameworks and statistical evaluation of model impact on user metrics.

Required skills

• Hands-on Python and Scala for data pipelines and model serving systems.
• Deep learning frameworks such as PyTorch, TensorFlow or JAX.
• LLM fine-tuning and deployment with tools such as Hugging Face Transformers.
• Production deployment with TensorFlow Serving, TorchServe or cloud-based ML platforms, optimized for latency.

What we offer

• Term life insurance and comprehensive medical insurance.
• GrabFlex benefits package tailored to individual needs.
• Parental and birthday leave, plus volunteering leave.
• A confidential assistance programme for employees and their families.