GO-JEK SINGAPORE PTE. LTD. Hiring! Full Time Principal Data Scientist - RPL in Central Region (Singapore), Earn up to SGD 15,000 - Ricebowl

What You Will Do

• Own the end-to-end modelling and estimation behind promotion optimisation — elasticity, heterogeneous treatment effects, budget-constrained allocation, and increamentality — from problem framing to production.
• Advance our causal inference stack: experiment and quasi-experiment design (geo/switchback tests, holdouts, diff-in-diff, synthetic control), debiasing observational data, and variance reduction — raising the bar on experimentation rigor across the team.
• Design and productionize heterogeneous treatment effect (uplift) models at scale (tens of millions of users), with honest offline evaluation (uplift/Qini curves, policy-value estimation).
• Formulate and solve budget-constrained allocation under fairness and dynamic business constraints — from LP/MILP to greedy or Lagrangian methods where they scale better.
• Mentor and technically guide a team of data scientists; set standards for model evaluation, documentation, and scientific review.
• Partner with business to turn model outputs into budget decisions, and communicate tradeoffs (subsidy efficiency vs. growth) clearly.

What You Will Need

• 8+ years in data science or ML, with 3+ years focused on causal inference or uplift modelling in production settings.
• Deep expertise in heterogeneous treatment effect estimation, with hands-on production experience in several of: meta-learners (S/T/X/R), causal forests, DR-learner, or deep uplift architectures.
• Hands-on experience optimising promotions, pricing, or marketing incentives with evolving constraints and measurable business outcomes.
• Strong grounding in experimentation and observational causal methods — propensity weighting, instrumental variables, synthetic control, difference-in-differences.
• Experience with constrained optimisation (MILP, Lagrangian methods, etc.) applied to resource allocation.
• Proficiency in Python and SQL; shipping models to production with engineering partners.
• Track record of technical leadership at principal/staff level: setting technical direction for a team, reviewing high-stakes analyses, and influencing roadmaps and partner teams without direct authority.
• Experience in marketplaces, ride-hailing, food delivery, e-commerce, or fintech.