Senior Principal Engineer – AI Content Systems (all genders)

Babbel·Berlin·Remote·Posted 21 October 2026

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About the role

ABOUT BABBEL LABS Babbel Labs is building the future of language learning. We are an AI-first, independent company within the Babbel group, based in Berlin. Our teams bring AI, research and product together to ship experiences that set a new standard for how people learn. THE ROLE Babbel Labs is looking for a Principal Engineer to own our AI content systems end to end. Starting from nothing, together with our learning content experts, these systems create all of our content: the curriculum itself, and the thousands of exercises built on it, with text, images and audio generated by models and judged by experts. Your main goal: set a high bar, and design a robust, verifiable system that turns our experts' skills into real outcomes for learners. This is an Individual Contributor role with influence across Engineering, Content and Product. You design and build the systems yourself, set the technical direction for the engineers working on them, and work closely with the language and curriculum experts who own the quality bar. We move fast and get things done. When something important comes up, we adapt the roadmap, and you help the team re-plan and keep shipping. HOW…

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