Senior Machine Learning Engineer - Trust Platform

About the role

Grab is looking for a Senior Machine Learning Engineer for its Trust Platform in Singapore. The role solves trust problems end to end: investigating complex risk patterns, building the data and production components needed, and measuring whether the solution works in the real world.

Key responsibilities

• Investigate fraud, abuse, account integrity and platform-safety problems using data and domain knowledge.
• Define success metrics that balance detection quality, user experience, latency and operational cost.
• Determine whether a problem is best solved with ML, heuristics, rules, graph techniques, optimisation or system changes.
• Build data pipelines and features from high-volume batch and streaming data.
• Develop proof-of-concept solutions and validate them against realistic baselines, then convert them into scalable, tested and observable production systems.
• Integrate solutions into real-time risk decisioning and offline detection workflows.
• Design experiments and monitoring to assess effectiveness, false positives, drift and new attack patterns, and perform root-cause analysis as adversarial behaviour evolves.
• Improve the technical foundations so future trust solutions are faster and safer.

Required profile

• At least 4 years of relevant experience in software development and problem solving.
• Experience using data to solve open-ended product or operational problems.
• Experience building production data pipelines, backend services or decision systems.
• Ability to explain technical reasoning, assumptions, trade-offs and experimental results.
• Comfortable working across modelling, data engineering and software engineering boundaries.

Required skills

• Proficiency in SQL and at least one production programming language.
• Working knowledge of machine learning and statistical evaluation.

What we offer

• Term life insurance and comprehensive medical insurance.
• Parental and birthday leave, plus volunteering leave.
• A confidential assistance programme for Grabbers and their families.
• FlexWork arrangements such as differentiated hours.