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Founding Engineer

Tech Talent Network — United Kingdom · Posted ~3 days ago

Senior Full-time Onsite Visa History ✓ £100K-£150K

Skills

Backend Engineering AI Agents RAG Systems LLM Python RAG

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Summary

We're seeking a Founding Engineer to join an AI-first startup tackling a massive legacy industry. You'll build and ship core product features end-to-end, design scalable backend systems and APIs, develop AI agents and LLM workflows, and own technical decisions that shape the engineering culture. We're looking for someone with strong backend engineering experience (ideally Python), experience building AI products, RAG systems, or LLM-powered applications, high agency with a founder mentality, and excellent communication skills. This is a rare opportunity to join at day zero and help build something genuinely category-defining alongside experienced second-time founders backed by a standout pre-seed investment round.

Highlights

Competitive salary with meaningful equity, true founding engineer ownership, opportunity to build product and AI systems from scratch, work alongside experienced second-time founders, backed by a major pre-seed investment, join at day zero to build something category-defining.

Description

🚀 Founding Engineer | Agentic AI Startup We're partnering with an exceptional startup founded by two very well-educated, second-time founders who are tackling a huge legacy industry with an AI-first approach Having secured one of Entrepreneur First's largest ever pre-seed investments, they're now hiring their first Founding Engineers to help build a category-defining company from day one! 📍 London (5 days in-office) 💰 £100k-£150k + meaningful equity 🏗️ True founding engineer ownership ⚡ Build the product, infrastructure, and AI systems from scratch What you'll do ⚙️ Build and ship core product features end-to-end ⚙️ Design scalable backend systems, APIs, and integrations ⚙️ Develop AI agents, LLM workflows, and retrieval systems ⚙️ Own technical decisions and shape engineering culture ⚙️ Work directly with customers and founders to solve complex real-world problems What we're looking for 👩 💻 Strong backend engineering experience, ideally with Python 🤖 Experience building AI products, agents, RAG systems, or LLM-powered applications 🚀 High agency with a founder mentality ⚡ Proven track record of shipping quickly and taking ownership 🧠 Strong product instincts and excellent communication skills Why join? 💰 £100k-£150k + meaningful equity 🏗️ True founding engineer ownership ⚡ Build the product, infrastructure, and AI systems from scratch 🏆 Work alongside exceptional second-time founders 💰 Backed by one of Europe's standout pre-seed rounds If you want the chance to join at day zero and help build something genuinely category-defining, let's talk.