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# (MSc/PhD) AI Research Intern - LLMs, Causal Inference & Decision Making

- **Company:** Prosus
- **Location:** Amsterdam, Netherlands
- **Experience:** Internship
- **Contract:** Internship / Graduate position
- **Skills:** Artificial Intelligence, Artificial Neural Networks, Directed Acyclic Graph (Directed Graphs), Experimental Data, Python (Programming Language), Machine Learning, Pytorch, Large Language Models, Machine Learning Operations
- **Published:** September 4, 2026
- **Apply:** https://nl.indeed.com/viewjob?jk=1a0cd6cd0571873b

## About the Role

* You're strong in mathematics, probability, and statistics and enjoy reasoning about problems formally.
 * You have strong quantitative modeling fundamentals, whether your background is in machine learning, economics, finance, operations research, statistics, or another technical field.
 * You understand causal and experimental reasoning and are comfortable thinking about RCTs, counterfactuals, treatment effects, and confounding.
 * You're interested in optimization and decision making, such as allocating limited resources, optimizing under constraints, or choosing actions under uncertainty.
 * You know how to write good Python code from projects, research, coursework, or similar experience.
 * You're comfortable with modern AI, including neural networks, representation learning, transformers, and LLMs, or have the technical background and interest to learn them quickly. Experience with PyTorch/JAX is a strong plus.
 * You can make sense of research by reading papers, understanding the key ideas, questioning assumptions, and turning them into working code.
 * You work well with others, are genuinely curious, and enjoy learning new ideas and technologies.
 * You're friends with AI assistants and use them regularly for coding, research, and writing.
 * You can commit to 6-12 months working with us in Amsterdam (minimum 3 days in the office weekly). We'll work with your academic schedule.

Experience with causal inference, econometrics, empirical economics, operations research, quantitative finance, uplift modeling, treatment-effect estimation, or mathematical optimization is a plus. This could include methods such as S/T/X-learners, causal forests, causal DAGs, potential outcomes, linear or integer optimization, Lagrangian/dual methods, stochastic optimization, or related techniques.

Prior experience with promotions, pricing, ads, recommendations, logistics, marketplaces, or other allocation and decision systems is a strong bonus, but not required.

## Description

* Build and experiment with LLMs, representation models, and modern ML systems for causal and decision-making problems
 * Work with large-scale experimental data to understand how users respond to different interventions
 * Build models for treatment effects, uplift, and counterfactual prediction
 * Design experiments, analyze randomized controlled trials, and evaluate results
 * Develop constrained optimization models for promotion and incentive allocation
 * Read research papers, prototype ideas, and turn the ones that work into real systems


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