Senior Product Engineer
Senior Product Engineer | AI Platform | London Hybrid | £100,000–£120,000 + Share Options
I’m working with a profitable, fast-growing technology company building an AI-powered research platform that is transforming how organisations move from questions to decisions.
They already work with major global brands, charities and institutions, and are now expanding the senior engineering team behind their next-generation AI platform.
This is a brilliant opportunity for a strong Senior Product Engineer who wants genuine ownership, close customer exposure, and the chance to build production AI features from the ground up.
You’ll be joining a product engineering culture that is much closer to forward-deployed engineering than a traditional engineering setup. Engineers work directly with customers, shape the problem as well as the solution, and own outcomes end-to-end.
What you’ll be doing:
• Owning product features from customer conversation through to deployment
• Building across frontend, backend and AI workflows
• Designing and operating production LLM features
• Writing evals, iterating on prompts and debugging agent behaviour
• Building and improving RAG workflows, retrieval and agent loops
• Breaking down ambiguous product problems into practical, shippable solutions
• Monitoring, operating and improving the systems you ship
• Contributing to code quality, testing, documentation and engineering standards
• Working directly with customers to understand problems and shape product direction
Tech stack:
Python, FastAPI, LangGraph, Redis, PostgreSQL, Neo4j, React, TypeScript, Kubernetes, GCP and Datadog.
What they’re looking for:
• Around 5+ years of engineering experience, although quality of delivery matters more than years
• Strong full-stack capability across frontend, backend and AI-enabled product features
• Solid Python experience
• Experience building complex backend systems, including databases, async workflows and queue-based architectures
• Production experience with LLMs, agentic systems, evals, RAG and tool use
• A strong product mindset and comfort working directly with customers
• Experience operating software in production, including observability and on-call ownership
• Background in a fast-paced startup or 0-to-1 environment
• Strong systems thinking and the ability to take ownership of unclear, evolving problems
Bonus points:
• Experience with agentic systems, fine-tuning or RAG at scale
• Strong DevOps or infrastructure ownership
• Experience running deployment pipelines or on-call rotations
• Exposure to market research, survey methodology or data-heavy products
• Mentoring experience and a genuine interest in raising engineering standards
Package:
• £100,000–£120,000 base salary
• Share options
• Private healthcare
• Pension
• 25 days annual leave
• Cycle to Work scheme
• Laptop and equipment budget
• Bright Spitalfields office
• Hybrid working in London
This is a great opportunity for a senior engineer who wants real product ownership, serious exposure to production AI systems and the chance to help shape an ambitious platform at a key stage of growth.
Apply if you’d like to hear more.