Founding RL Research Engineer — Hybrid (EU) + Equity

Built Different is seeking top AI engineers to design RL environments that leverage real human behavioral data. The role offers a hybrid London/Paris/Amsterdam setup with some remote options and a base salary of £130,000 plus founding equity.

You will work at the frontier of AI labs, building end-to-end evaluation-to-training loops, and deliver significant gains in model learning signals with real-world impact.

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