Senior Research Scientist | Multimodal SystemsActive

Hybrid · LondonOperations

The opportunity

Meet DeepL DeepL is a global AI product and research company focused on building secure, intelligent solutions to complex business problems. Over 200,000 business customers and millions of individuals across 228 global markets today trust DeepL's Language AI platform for…

What they're looking for

  • Deep, hands-on expertise in model post-training, knowledge distillation: (teacher-student training), and/or reinforcement learning (RLHF/RLAIF, PPO/GSPO, and reward modeling).
  • Strong data-centric instincts for building synthetic-data and preference-data: pipelines, Model-as-judge generation, data curation and filtering, data augmentations, and/or reasoning about data mixtures and ablations.
  • A hands-on builder who enjoys training models, running experiments, debugging: pipelines, and integrating ML systems into production while staying grounded in product impact and real-world quality.
  • Strong coding and experimentation skills (Python, PyTorch/JAX/Tensorflow),: and the ability to communicate clearly and align research with product and engineering priorities.