Full Stack Engineer (Backend Leaning)

Python - Conversational AI

London

We have partnered with an early-stage startup is reimagining how we learn languages. By creating immersive, voice-led digital worlds powered by real-time conversational AI and agentic LLMs.

Users step into dynamic narratives tailored to their personality, interests, and fluency level, actively learning by hearing and using the language in context.

The Role

You’ll work across the stack, shipping features that bring these experiences to life!

🛠️ Full stack product work — real-time voice, AI, and UI, Backend Systems

💻 Tech:Python (FastAPI), TypeScript, WebRTC, Modal, LLMs, AI

👥 Small, fast-moving team with full ownership from day one

🌍 Based London (meeting once a month in Paris or London)

You’ll thrive if you:

⚙️Have 5+ years of experience with both Python and TypeScript

💡You are a Python expert, with deep experience in backend systems, building for AI applications

🤖Enjoy building with LLMs, agentic workflows, and/or conversational voice AI

🏅Are pragmatic, collaborative, and excited to solve hard problems quickly

💥You have experience working on 0-1 / startup projects

This is a rare chance to shape something genuinely new at the intersection of AI, UX, and human connection.

Drop me a message if you’d like to hear more!