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Principal ML Engineer - Remote/Hybrid, Lead Production AI

Description

Harnham is seeking a Principal Machine Learning Engineer in Barcelona, offering a €135,000 base salary with a €15,000 bonus and an OTE of €150,000.

The role supports fully remote or hybrid work (2 days in office).

You will define technical direction for large-scale ML systems while remaining hands-on across the full model lifecycle.

You will lead end-to-end ML initiatives in recommendation, targeting, bidding optimization, and lifecycle modelling, partnering with senior engineers and J-18808-Lj…

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