Joining Busuu means being part of one of the top EdTech companies in the world, a multiple award-winner recognised for its innovation and impact in language learning.
We are the world's largest online community for language learning, with 120+ million registered users. We make learning a language easy by combining AI-powered courses with feedback from our global community of native speakers and lesson content designed for real life.
Busuu is part of the general Chegg family. What does a Senior Machine Learning / AI Engineer do at Busuu?
Own the design, development and deployment of production-grade agentic systems that power adaptive learning experiences - from multi-step reasoning pipelines to autonomous feedback loops that respond to learner behaviour in real time.
Architect and integrate LLM-powered features using retrieval-augmented generation (RAG), prompt engineering strategies, and evaluation pipelines. Lead application of these to high-impact use cases such as mistake analysis, content generation, and personalised learning paths.
Define agent orchestration patterns, tool use,



memory, and state management strategies for production environments, and establish best practices across the team.
Collaborate with Data Scientists and Senior ML Engineers to move models from experimentation to production, including feature engineering, training pipelines, online inference, and monitoring. Take ownership of reliability and quality end to end.
MLFlow, Airflow, SageMaker, Kubernetes), and help make AI development faster and safer across the team.
Work closely with Data Engineers, Product Managers, Designers, and other engineers to embed intelligence into our products, improve experimentation velocity, and drive measurable learning outcomes.
Shape our evolving AI strategy and contribute to the wider engineering community.
What we're looking for in a Senior Machine Learning / AI Engineer
Strong foundations in machine learning, applied AI, and software engineering. You write

📌 Data Science Data Science Senior Data Engineer (España)
🏢 Busuu
📍 España