Senior Data Scientist, Experimentation & Causal Inference

Cupertino, California, United States Machine Learning and AI

At Apple, some of the most important decisions are shaped by the quality of the evidence behind them. We are seeking a Senior Data Scientist, Experimentation & Causal Inference to help advance the scientific foundations of measurement, experimentation and organisational learning across Apple Services. This role sits at the intersection of statistics, causal inference, experimental design and decision‑making. You will help define how success is measured, how experiments are designed and how causal evidence is generated and accumulated across the organisation.

Beyond individual experiments, you will help build the next generation of experimentation intelligence by transforming isolated experiment outcomes into reusable scientific knowledge. As Apple expands investments in AI‑powered experiences and intelligent systems, this role will also help evolve the experimentation methodologies used to evaluate increasingly complex product behaviours and long‑term user outcomes. The ideal candidate combines deep statistical expertise with strong scientific curiosity and a passion for developing rigorous methodologies that improve how organisations learn and make decisions at scale.

As a Senior Data Scientist, Experimentation & Causal Inference, you will own key components of the experimentation science ecosystem. You will work across product, growth, engineering, data engineering and strategic science teams to define measurement frameworks, experiment methodologies, statistical standards and causal inference approaches that improve organisational decision quality. This role extends well beyond traditional A/B testing. You will help establish experimentation standards, develop advanced causal methodologies, build experimentation intelligence systems and drive cross‑experiment learning initiatives.

You will play a critical role in ensuring that experimentation generates reliable evidence, scalable insights and reusable scientific knowledge. This includes helping establish experimentation approaches for emerging product paradigms where user interactions, adaptive systems and long‑term outcomes introduce new measurement and causal inference challenges. The ideal candidate possesses strong expertise in experimental design, causal inference, statistical modelling and scientific reasoning.

Experience with modern causal machine‑learning techniques, heterogeneous treatment‑effect estimation, meta‑analysis and experimentation intelligence systems is highly desirable.

• Experiment Design & Measurement Strategy
• Scientific Experiment Design
• Experiment Readiness & Statistical Governance
• Causal Inference & Methodology Development
• Advanced Causal Modelling
• Cross‑Functional Collaboration
• Communication & Influence

• Master’s degree or higher in Statistics, Data Science, Biostatistics, Computer Science, Economics, Applied Mathematics, Operations Research or a related quantitative discipline.
• 5+ years of experience designing, analysing and interpreting large‑scale experiments or causal analyses.
• Deep expertise in experimental design, statistical inference, causal inference, power analysis and measurement strategy.
• Experience developing measurement plans, KPI frameworks, guardrails, success criteria and experiment readiness processes.
• Strong programming skills in Python and/or R.
• Ability to evaluate experiment validity issues such as sample ratio mismatch, contamination, interference, instrumentation errors, metric sensitivity and under‑powered designs.
• Strong communication skills with the ability to explain complex statistical concepts and causal claims.

• PhD in Statistics, Biostatistics, Economics, Computer Science, Data Science, Applied Mathematics, Operations Research or a related quantitative discipline.
• Experience with modern causal machine‑learning methods such as uplift modelling, causal forests, heterogeneous treatment‑effect estimation, Bayesian experimentation, double machine learning or related methodologies.
• Experience conducting meta‑analysis, cross‑experiment synthesis, transferability analysis or…