Full Stack Engineer (AI Focussed)

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Full-stack Engineer (AI Focused) – London A fast-growing AI-native enterprise software startup is hiring two experienced Full-stack Engineers in London. The company builds a sophisticated AI workspace tailored to financial modelling, private equity, consultancies and asset managers, with live production deployments at leading institutions.
What you’ll be doing Designing and maintaining modern frontend web apps using React / Next.js Developing robust backend services and APIs, preferably in Python (Django, FastAPI, etc.) Owning large parts of the AI agent infrastructure: building and deploying multi-agent systems, Retrieval-Augmented Generation (RAG) pipelines, model fine-tuning and evaluation frameworks Ensuring that AI-powered features run in production at scale — with high reliability, performance and security Contributing to cloud infrastructure, containerisation, CI/CD pipelines, monitoring, and optimisation Collaborating closely with founders, designers, growth and engineering teams to deliver mission-critical, high-impact features Mentoring junior engineers and promoting engineering best practices
What they’re looking for 5+ years of professional software engineering experience Solid, hands-on experience with React / Next.js in production environments Strong backend development skills (Python preferred) and familiarity with databases (relational or NoSQL) Experience with Git, DevOps tooling, containerisation, CI/CD, caching or messaging systems (Redis, task queues, background workers) Previous experience building and deploying AI/LLM-powered systems , especially involving RAG pipelines, model fine-tuning and evaluation A structured, proactive approach to problem solving, and comfort working in a fast-paced, high-ambition startup environment
Why it’s a great opportunity Join a tech venture backed by top-tier investors (including Y Combinator), and work directly with founders who have a track record of successful exits Competitive salary, equity and performance-based incentives Be a key player in scaling the product internationally, with opportunities for real ownership and impact Work in a challenging but rewarding environment, alongside smart, tenacious people who thrive in ambiguity
If you’re passionate about building real-world AI systems end-to-end — from models to product — and want to be at the forefront of applying AI in enterprise workflows, this could be your next big move.
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Location:
City Of London, Greater London, London; England, United Kingdom
Job Type:
FullTime

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