Founding Engineer - London

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. · ...

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 ...

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 · ...

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 ...

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. · ...

An early-stage, · stealth-mode startup is looking for a · Founding Engineer · to join the team in central London. · £180,000 base salary · ...

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 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. · ...

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 ...

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

Founding Engineer – Series A Start-Up | Build From Day One · We're partnering with an early-stage, VC-backed start-up that has just closed its Series A and is gearing up to 3x the team this year. Backed by top-tier investors and led by founders with a proven track record of build ...

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. · ...

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, ...

+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 ...

Founding Engineer · London · Up to £150k + Up to 1% equity · A technical founder who holds the title for Britain's largest bootstrapped exit is going again This will be his 4th startup with 3x successful acquisitions under his belt, and he needs a founding team who can make it ...

+Job summary · This is not a typical engineering role. · You will build adaptive AI security systems, · design and ship security infrastructure that learns and evolves alongside the AI agents it protects,+QualificationsHands-on experience building production backends · Strong gra ...

+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 ...