Application Engineer, Cambridge or London (hybrid, 3 days onsite)Avanti Recruitment is partnering with a well-established award-winning AI software company that builds advanced technology used by leading organisations to manage and analyse large volumes of complex documents.Founded over a decade ago, the business combines deep technical expertise with real-world impact, operating at scale with enterprise customers while retaining the pace and agility of a product-led technology company.This is an opportunity to join a growing application engineering team working on production-grade systems at the intersection of software engineering, data, and applied AI.THE ROLEAs an Application Engineer, you will work within a cross-functional product team, building and scaling features that are used directly by customers.Develop full stack features across a large, complex platformWork with high-volume, data-heavy systems where performance and scalability matterCollaborate closely with product managers, QA, and AI-focused RandD teamsTake ownership of features from design through to production and iterationContribute ideas and improvements rather than working from rigid specificationsTECH ENVIRONMENTJavaScript and TypeScriptNode.jsModern frontend frameworks (with an ongoing migration to React)PostgreSQL, Elasticsearch, RedisAWS, Docker, KubernetesJava / Python experience is an advantageWHAT THEY ARE LOOKING FORStrong academic background in Computer Science, Mathematics, Physics, or a related