Staff Machine Learning Engineer

Responsibilities

• Design, build, and productionize causal ML systems influencing marketplace decisions across DoorDash New Verticals.
• Build uplift and heterogeneous treatment effect models for lifecycle value, promotions, retention, and reactivation.
• Develop counterfactual evaluation frameworks for ranking, recommendations, search, promotions, substitutions, and marketplace interventions.
• Connect experimentation, observational data, and ML decisioning to support better marketplace tradeoffs.
• Design surrogate metrics and early indicators that preserve long-term marketplace health.
• Translate causal models into production systems for ranking, targeting, budget allocation, inventory-aware discovery, and consumer growth.
• Raise causal reasoning standards across ML teams and help evaluate and debug causal claims.

Requirements

• Deep practical experience with causal inference, econometrics, experimentation, or causal ML.
• Experience shipping production models or decision systems, ideally in high-scale marketplaces or related domains such as ads, recommendations, search, pricing, promotions, logistics, or fintech.
• Strong judgment regarding randomized experiments, observational estimation, and model-based decisioning tradeoffs.
• Experience applying methods such as doubly robust estimation, double machine learning, instrumental variables, difference-in-differences, CUPED, uplift modeling, contextual bandits, and off-policy evaluation.
• Strong ML engineering ability to build reliable pipelines, train models, evaluate them rigorously, and partner with platform teams for production deployment.
• Strong product judgment connecting causal methods to business decisions rather than only optimizing offline metrics.
• Ability to collaborate with ML engineers, economists, data scientists, product managers, and business leaders.

Benefits

• 401(k) plan with employer matching
• 16 weeks of paid parental leave
• Wellness benefits and expense reimbursement
• Commuter benefits match
• Flexible paid time off/vacation for salaried roles
• 80 hours of paid sick time per year for salaried roles
• Medical, dental, and vision benefits
• 11 paid holidays
• Disability and basic life insurance
• Family-forming assistance
• Mental health program
• National base salary range of $203,500–$299,300 USD
• Equity grant opportunities