Full Stack Engineer

Property still runs on scribbles, spreadsheets and “sorry, we missed your call.” My client is fixing that - building AI workers that handle tenant engagement, landlord outreach, compliance and maintenance autonomously, replacing decades-old agency workflows.

$5.5m+ raised from top-tier VCs, already live with agencies across the UK and gaining traction in the US.

Now they need founding-level Full-Stack Engineers to own the whole stack, not a slice of it.

You’ll build the Python/FastAPI backend that orchestrates the AI agents - telephony and real-time voice, LLM orchestration, RAG pipelines, and the event-driven architecture tying it all together. Just as much of this is traditional backend engineering too: API integrations with CRMs and property platforms, data modelling, webhooks, the plumbing that makes the AI actually work in production. You’ll also touch the Next.js/TypeScript frontend the operators and customers use directly.

Concept to production in days, not sprints. You’re making the architecture calls, not waiting for someone else to.

• Have 3+ years of Python with genuinely strong FastAPI experience - async APIs, event-driven services, and solid fundamentals underneath (database design, queuing, CI/CD), not just surface familiarity
• Have 2+ years building and shipping AI agents or LLM-powered systems in production - real end-to-end orchestration (LangGraph or similar), not just having called an LLM API
• Have strong, evidenced RAG experience - structuring unstructured data, hands-on with vector databases (Pinecone, pgvector or similar)
• Can go equally deep on TypeScript/React/Next.js in production, not side projects
• Know your way around Postgres, Redis, and GCP or AWS in a live environment, with real observability and debugging chops (Datadog, Sentry, LangSmith or similar)
• Have genuinely taken something from 0 to 1 - built and owned an entire system from scratch, ideally at an early-stage startup or solo on your own product
• Are a fast, sharp thinker who can talk product as naturally as code - this is a founding seat, and we’re looking for outsized impact, not just competent delivery
• Want a founding seat and the equity that comes with it, not a job spec someone else already wrote

Nice to have: voice AI / real-time communication experience (LiveKit, Twilio, WebRTC, STT/TTS)