Founding Engineer - London, England

Would you like the opportunity to work for a fast-moving AI start-up who are building and scaling software products with creators. · Owning fullstack development across multiple products — designing APIs and data models, building and shipping services, and maintaining quality in ...

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. · ...

I'm working with a stealth-stage AI company that's tackling one of the biggest challenges in the field right now: making AI systems reliable trustworthy and ready for heavily regulated industries like Finance. · ...

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 ...

We're partnering with a Series A AI startup building LLM-powered agents to automate real-world workflows. · Build and ship AI agents using modern LLMs · ...

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 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. · ...

A newly formed company that graduated Y-Combinator is looking to hire a Founding Engineer for their London team. · ...

An early-stage well-funded AI company in the energy space is looking for a Founding Engineer to help take a production platform through its next stage of growth. · ...

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. · ...

+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 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're working with an early-stage AI company building a category defining product and looking for a Founding Engineer to help shape both the technology and the culture from the ground up. · ...

+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 ...

Founding Engineer | Early-Stage Defence Start-Up | London · Founding engineer required for an early-stage defence technology start-up building mission-critical systems with real-world impact. · You'll join at the ground floor, working directly with the founders to design, build, ...

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 ...

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 · Founding Engineer role at an early-stage cyber security startup building foundational technology. · +ResponsibilitiesBuild core systems from the ground up in a language-agnostic environment. · Work across backend, infrastructure, and product logic (depending on you ...

A well-funded, early-stage AI infrastructure startup is on a mission to remove one of the last major bottlenecks in the physical world. · Ship production-grade code from day one · Own full-stack feature development across infra, tooling, and application layers · Solve hard techni ...