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Principal Applied Research Engineer

Synthesia is the world’s leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and the US. As AI continues to shape the way

Company

Synthesia

Location

Europe

Status

Open

Posted

2026-05-22T14:15:33.435+00:00

Synthesia is hiring a Principal Research Engineer (L7) to own the technical direction for offline video generation across pre-training and post-training. It is a senior individual contributor role: setting a long-term roadmap with research leadership, unblocking pipeline problems, speeding research into product, and coaching junior researchers. The posting asks for hands-on experience training large video generation models from scratch across multiple nodes and millions of hours of data, plus post-training methods such as RLHF, GRPO and DPO. The distinctive point is end-to-end ownership of both training stages.