Founding Engineer - London

This is a true 0-to-1 role for a founding engineer to build AI agents that connect people - real products with real users in London, · ResponsibilitiesBuilding the core product end-to-end across frontend, backend, and AI systems · Shipping fast, owning production, and iterating d ...

A founding engineer position in an early-stage defence technology start-up building mission-critical systems in London. · Design, build, and deploy core technology from day one. · ...

We are looking for a Founding Engineer to join the company at an early stage and help shape the technical and product foundations of Cortex Research. · Cortex Research is a UK-based frontier AI research company building next-generation, UK-native AI systems for both B2B and B2C a ...

We are super excited to have partnered with a pre-seed funded startup who are building Agentic AI systems to transform the productivity of workers and businesses worldwide. · Backend (Python) · Frontend (Typescript, React) · ...

Join a founding team with a proven record of building successful start-ups at an early-stage cybersecurity start-up redefining how organisations protect data and infrastructure. · ...

Founding Engineer · I am supporting a well funded early stage AI startup building real time coaching technology embedded directly into live sales calls. Their platform delivers instant, contextual guidance during conversations, surfacing the right prompts and discovery questions ...

This isn't another early-stage role with duct-taped systems and vague vision. · This team just raised $20M and is assembling a founding engineering group with one rule: · only exceptional people. · ...

This isn't another 'early-stage' role with duct-taped systems and vague vision. This team just raised $20M and is assembling a founding engineering group with one rule: only exceptional people. · ...

Job summary · Join as employee #4 with genuine founding engineer ownership working on cutting-edge AI: agent reasoning, real-time voice processing, memory systems. · Qualifications5+ years of software engineering experience · Strong backend fundamentals – Python preferred but not ...

A newly formed company that graduated Y-Combinator is looking to hire a Founding Engineer for their London team. Having secured £10m in funding from top investors, they're excited to press on and this hire is critical to how they do that. · ...

Founding Engineer (AI & Agentic Systems) · £150,000–£170, –1.2% equity · London (primarily in-person, flexible remote days) · A venture-backed AI start-up is hiring a Founding Engineer to build and ship AI-powered product features end to end. · They're developing an AI-driven lif ...

We are early-stage product-led company building next generation beer taps. This is founding-level role with real ownership working on hardware firmware manufacturing and field installs. · Design build and iterate on electromechanical systems valves motors sensors · ...

We are building the next generation of global trading infrastructure. Designed for sub-millisecond execution and institutional depth, our platform powers spot, perpetuals, and prediction markets on a unified liquidity engine. · Secure a significant stake in a well-funded, early-s ...

Founding Engineer · Central London · Up to £235k + Founding Equity · We're looking for engineers who don't wait for tickets to tell them what to do The kind who enjoy jumping into messy problems, talking to real users, sniffing out bottlenecks early, and sketching solutions that ...

We're partnered with a pre-seed AI startup building agentic AI systems that radically improve how knowledge workers think, decide, and get work done. · ...

We're hiring for a seed-stage SaaS startup backed by Balderton that's using AI to fundamentally redefine its product. · ...

We are looking for a Founding Engineer to build the core platform end-to-end alongside the founders. This is a high-ownership role that combines decision-making, hands-on building, and long-term accountability for production systems. · ...

What We Do · Axe builds AI agents for logistics and supply chain operations. · Logistics is a trillion-euro industry still powered by billions of phone calls, emails, and spreadsheets. Axe replaces this manual work with intelligent AI agents - so human teams can focus on high-imp ...

We re working with an early-stage InsurTech startup redefining how insurance products are built priced and operated. This is a true founding engineer role not maintenance not tickets not inherit a legacy codebase and survive You ll be building core systems from day one and shapin ...

+Job summary · We are seeking a Founding Engineer (CTO-track) to take end-to-end ownership of building and launching our platform.This is a hands-on, full-stack role initially: you will own the architecture, build core product capabilities, and deploy and operate the platform in ...

We are working with an exciting AI start up tackling one of the most crucial challenges for SaaS businesses. · Why join: · High impact & ownership over core product. · Work closely with a high calibre founding team. · ...