About this role
Senior AI Software Engineer
London (Hybrid, 3 days per week)
Up to £140,000 + Equity
We're partnered with a fast-growing AI start-up building cutting-edge behavioural intelligence technology for the financial services sector. Backed by an exceptional leadership team and industry experts, they're developing a platform that helps organisations better understand client behaviour through advanced AI and large language models.
As their first senior individual contributor engineering hire, you'll play a critical role in shaping both the product and engineering culture from the ground up.
The Opportunity
This is a true 0-to-1 product engineering role. You'll work closely with senior leadership to build and scale a greenfield product, taking ownership across the full stack while driving the architecture and evolution of production-grade AI systems.
You'll have significant influence over technical direction, engineering standards, product decisions and future hiring as the team grows.
What You'll Be Doing
Building and shipping customer-facing product features end-to-endDeveloping and scaling production LLM applicationsOwning RAG pipelines and AI application architectureImplementing guardrails, evaluations, caching and model routing strategiesWorking across TypeScript, React, Node.js, PostgreSQL and AWS (Open to different technology backgrounds!)Building API-first services for enterprise customersEstablishing engineering best practices around testing, deployment and code qualityCollaborating directly with product and leadership stakeholders to influence roadmap and delivery priorities
What We're Looking For
Experience building and scaling production LLM-powered applicationsStrong full-stack engineering backgroundExperience delivering secure, reliable and scalable systemsComfortable working across multiple technologies and learning new stacks quicklyExperience with React and modern web applicationsProduct-minded approach with the ability to operate autonomouslyPassion for building in an early-stage, high-growth environmentExperience within regulated industries or financial services is beneficial but not essential
Why Join?
Up to £140,000 base salaryMeaningful equity packageOpportunity to become the first senior engineering hireDirect impact on architecture, product and company directionWork alongside talent from leading technology and AI organisationsGreenfield product with genuine product ownershipHybrid working in Central London25 days holiday plus additional benefit