Senior Principal Data Scientist — Marketplace RL & LLM

Data Science; Singapore; Sur place; SGD 180 000 - 240 000; Plein temps

Résumé du poste

Grab in Singapore is seeking a Senior Principal Data Scientist to lead automated marketplace optimization, focusing on reinforcement learning, large language models, and scalable production systems.

You will design end-to-end RL systems for pricing, dispatch, and supply repositioning, and build latent world models for marketplace state representations, collaborating with engineers to deploy solutions serving millions of users and driver-partners across Southeast Asia.

Responsabilités

• Design and implement end-to-end RL systems that combine model-based RL, offline RL, simulation, and online learning into a unified training pipeline.
• Build latent world models and marketplace state representations that capture supply-demand interactions, location-based patterns, and behavioural signals from users and drivers.
• Develop systems that optimize across multiple marketplace levers simultaneously - pricing, dispatching, and supply repositioning to expand the set of achievable outcomes for the business.
• Create policy evaluation frameworks and establish monitoring systems that allow safe deployment of new decision-making policies in production.
• Fine-tune open-source large language models on domain-specific data to build capabilities for prediction, reasoning, and simulation within marketplace applications.
• Design and implement training strategies for language models, including supervised fine-tuning, preference-based alignment, and iterative improvement methods.
• Work with data engineers and backend engineers to integrate RL and LLM systems into real-time production environments serving millions of users.

Connaissances

Reinforcement Learning

Large Language Models

Machine Learning

Production Systems

Team Leadership

Description du poste

Grab in Singapore is seeking a Senior Principal Data Scientist to lead automated marketplace optimization, focusing on reinforcement learning, large language models, and scalable production systems.

You will design end-to-end RL systems for pricing, dispatch, and supply repositioning, and build latent world models for marketplace state representations, collaborating with engineers to deploy solutions serving millions of users and driver-partners across Southeast Asia.