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 ...

+Job summary · We're hiring a Founding / Senior Software Engineer to join a well-funded, early-stage AI product team based in London.This is a hands-on, high-ownership role for someone who enjoys building real products from the ground up and wants meaningful influence over techni ...

We are looking for a Founding Engineer to work with our early stage startup building browser-based agent technology to securely and reliably automate complex web tasks for modern organisations.This is a genuine founding engineer opportunity where you will have meaningful ownershi ...

+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.They are looking for a Founding Engineer with a strong product mindset, an appetite to learn, and an ambiti ...

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 ...

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 ...

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 · 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 ...

Stamina is bridging the gap between static training plans and coaches. · ...

This is a unique opportunity to help build a transformative new platform at the intersection of software systems, automation, and intelligent infrastructure. · ...

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 ...

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. · ...

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) · ...

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. · ...

This is a hands-on role where you will work directly alongside the founding team to help shape the core technology and company culture. · 3+ years of Software Development experience in Python, Java, C#, C++ · Experience working on an end-to-end development cycle · ...

+Job summary · We are building the Agentic Operating System for Consultants. · QualificationsYou are a Product Engineer: You don't need a 20-page PRD. You can take a vague user pain point from a design partner and ship a functional prototype by Friday. · ...

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