Machine Learning Engineer (Applied/Research)

Machine Learning Engineer / Applied and Research / LondonA 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 doBuild ML-driven systems for understanding complex informationDesign knowledge representations, ontologies and graph-based systemsDevelop advanced retrieval and search across dense, sparse and structured dataBuild NLP and information extraction pipelinesExplore how knowledge can be connected, validated and reasoned overTurn research into production-ready technologyShape architecture and technical direction from day oneWhat they're looking forExperience across ML, NLP, Information Retrieval or Knowledge RepresentationExperience with knowledge graphs, graph databases or Neo4j highly desirableStrong ML fundamentals and software engineering abilityExperience taking research or experimentation into working systemsExcellent academics or clear evidence of exceptional technical abilityCuriosity around LLMs, reasoning systems and semantic searchWhy join?Join a highly technical founding team at the start of the journeyWork on foundational AI problems, not another AI wrapperOwn key decisions across ML, research and architectureCombine deep research with hands-on engineeringMake an outsized impact on a potentially category-defining productFlexible/hybrid LondonMachine Learning Engineer / Applied and Research / London