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-end
Developing and scaling production LLM applications
Owning RAG pipelines and AI application architecture
Implementing guardrails, evaluations, caching and model routing strategies
Working across TypeScript, React, Node.js, PostgreSQL and AWS (Open to different technology backgrounds!)
Building API-first services for enterprise customers
Establishing engineering best practices around testing, deployment and code quality
Collaborating directly with product and leadership stakeholders to influence roadmap and delivery priorities
What We're Looking For
Experience building and scaling production LLM-powered applications
Strong full-stack engineering background
Experience delivering secure, reliable and scalable systems
Comfortable working across multiple technologies and learning new stacks quickly
Experience with React and modern web applications
Product-minded approach with the ability to operate autonomously
Passion for building in an early-stage, high-growth environment
Experience within regulated industries or financial services is...
Senior AI Software Engineer employer: Harnham - Data & Analytics Recruitment Careers
As a leading consumer retail organisation based in London, we pride ourselves on fostering a dynamic and inclusive work culture that champions innovation and collaboration. Our commitment to employee growth is evident through tailored development programmes and the opportunity to lead transformative digital initiatives, all while enjoying a competitive salary and bonus structure. Join us to be part of a forward-thinking team that values your contributions and empowers you to drive meaningful change in a rapidly evolving market.
Contact Details:
Harnham - Data & Analytics Recruitment Careers Recruitment Team
