Product Engineer
Product Engineer | FastAPI, React, Supabase | Generative AI Start Up
- Salary: Up to £100k + meaningful equity
- Location: Central London Offices, On-site
- ( Please note: sponsorship is not available at this time. )
The Role
You’ll join a small, high-calibre engineering team building AI-native products from the ground up. In this role, you will work across the full stack to architect, build, and ship production systems powering multimodal AI agents . You’ll design intuitive interaction models for human–AI collaboration , develop scalable backend services, and rapidly prototype new features at pace.
You’ll also work directly with the founding team to shape technical direction, defining the platform architecture and helping build a genuinely new category of agent-led product development. This is a true 0→1 engineering environment where you’ll have deep ownership and impact.
Non-Negotiables
- Full-stack engineering experience with production delivery
- Ability to ship end-to-end features in containerised environments
- Comfortable navigating ambiguity , shifting priorities, and rapid experimentation
- Strong problem-solving mindset with ownership and resilience
Nice to Haves
- Founder or founding engineer background
- Experience building interfaces for agentic workflows
- Exposure to LLMs , multimodal models, or agent UX (AX)
- Experience shaping technical strategy in early-stage teams
What You’ll Work With
- FastAPI backend development
- React engineering and modern frontend tooling
- Supabase or similar cloud-native backend tools
- LLM agent workflows: tool calling , memory, retries, context updates
- Human–AI interaction models and agent UX (AX) design
- System design , architecture evolution, and scaling pathways
- MCP integrations and multimodal agent capabilities
Why join
You’ll join a deeply AI-native engineering culture where you’ll help define how humans and agents build products together. You will:
- Influence core platform architecture during its foundational stage
- Build and iterate on multimodal agent systems
- Prototype and refine new models of human–agent collaboration
- Work closely with founders on strategy and product direction
- Be part of a high-intensity, supportive team obsessed with building exceptional products
Product Engineer | FastAPI, React, Supabase | Generative AI Start Up