Senior Principal Data Scientist — RL & AI Systems Lead

Grab; Singapore; On-site; SGD 240,000 - 420,000; Full time

Benefits offered by this job

Term Life Insurance

Medical Insurance

GrabFlex benefits

LASA volunteering leave

Assistance Programme

Flexible work hours

Job summary

Grab is seeking a Senior Principal Data Scientist to lead the next generation of autonomous marketplace decisioning systems in Singapore. You will bridge research and production, guiding a team of scientists and engineers, and shaping strategy across reinforcement learning, latent world models, and generative AI.

This full-time onsite role anchors at Grab's One-North office. You’ll own high-impact ML/RL initiatives at massive scale, partnering with backend and platform teams to deliver

Qualifications

• PhD or equivalent with extensive ML research and production leadership.
• Strong foundation in RL, MDPs, and sequential decision systems.
• Proven deployment of production ML/RL under real-time constraints and data shifts.

Responsibilities

• Architect end-to-end reinforcement learning pipelines for pricing, dispatch, and supply repositioning.
• Design latent world models and state representations for marketplace dynamics.
• Establish OPE frameworks and safety guardrails for live deployments.
• Build behavioural simulations using LLMs to forecast decision dynamics.
• Partner with backend/streaming/engineering to deploy low-latency agents in production.
• Leverage AI tools to accelerate prototyping, testing and documentation.

Skills

Reinforcement learning foundations

Python

PyTorch

Large language model (LLM) adaptation

Distributed training / compute

Real-time ML/RL production

Education

PhD in CS / OR / Applied Math

MS with 12+ years equivalent experience

Tools

Ray

DeepSpeed

FSDP

Megatron-LM

Job description

Grab is seeking a Senior Principal Data Scientist to lead the next generation of autonomous marketplace decisioning systems in Singapore. You will bridge research and production, guiding a team of scientists and engineers, and shaping strategy across reinforcement learning, latent world models, and generative AI.

This full-time onsite role anchors at Grab's One-North office. You’ll own high-impact ML/RL initiatives at massive scale, partnering with backend and platform teams to deliver