Machine Learning Engineer (Applied/Research)

Machine Learning Engineer / Applied and Research / London A highly ambitious stealth AI startup is looking for an exceptional Engineer to join its lean founding team and build the intelligence layer behind a new generation of AI systems. This is a rare opportunity to get in genuinely early , working directly with a deeply technical founding team across machine learning, NLP, knowledge representation, graph systems and information retrieval, taking ideas from research → prototype → production . What you'll do * Build ML-driven systems for understanding complex information * Design knowledge representations, ontologies and graph-based systems * Develop advanced retrieval and search across dense, sparse and structured data * Build NLP and information extraction pipelines * Explore how knowledge can be connected, validated and reasoned over * Turn research into production-ready technology * Shape architecture and technical direction from day one What they're looking for * Experience across ML, NLP, Information Retrieval or Knowledge Representation * Experience with knowledge graphs, graph databases or Neo4j highly desirable * Strong ML fundamentals and software engineering ability * Experience taking research or experimentation into working systems * Excellent academics or clear evidence of exceptional technical ability * Curiosity around LLMs, reasoning systems and semantic search Why join? * Join a highly technical founding team at the start of the journey * Work on foundational AI problems, not another AI wrapper * Own key decisions across ML, research and architecture * Combine deep research with hands-on engineering * Make an outsized impact on a potentially category-defining product * Flexible/hybrid London Machine Learning Engineer / Applied and Research / London