Founding Engineer - London Area

We are looking for a Founding Engineer to work with an exciting Y Combinator-funded startup building browser-based agent technology to securely and reliably automate complex web tasks for modern organisations. · ...

Join a founding team with a proven record of building successful start-ups, this is a chance to be part of something from the ground up. · 5+ years of professional Software Engineering experience · Proficiency in programming languages such as Python, C#, TypeScript, Go or Java · ...

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

We're hiring for a seed-stage SaaS startup backed by Balderton that's using AI to fundamentally redefine its product. · , at a genuine inflection point, and looking for a hands-on engineer to help shape the product, architecture, and technical foundations from the ground up. · Fu ...

An exciting opportunity for a Founding Engineer has arisen with a rapidly growing technology company focused on transforming how advanced industries deploy and scale AI systems. · ...

+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 looking for a Founding Engineer to help build the core system from the ground up. · ...

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

+ Up to £150,000 base + 1% equity · + High impact & ownership over core product. · + Work closely with a high calibre founding team. · A Lead / Staff level Software engineer with strong backend engineering skills, ideally in Python. · ...

Founding engineer required for an early-stage defence technology start-up building mission-critical systems with real-world impact. · ...

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

We're building the AI-native Blackstone - a private equity firm that uses AI to analyze 100% of investment opportunities, · → AI-powered deal origination (SEC EDGAR, Companies House, CourtListener) · Automated underwriting with institutional-grade distress ratios · ...

A pair of second-time founders who have already built and exited successful ventures are assembling a new elite engineering team for their next AI startup. · ...

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. · This is a hands-on role for someone who has shipped real products at pace , thrives in amb ...

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. · ...

We're hiring a Founding/Senior Software Engineer to join a well-funded AI product team based in London. · ...

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 pre-seed founder-led startup seeks a Founding Engineer to build an AI layer for fintech. This opportunity targets a $100B market shift. · ...

A highly-backed, · fast-growing AI startup is expanding its founding engineering team. · ...

We are currently preparing for a Seed funding round and 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. · As a Founding Engineer, you will work closely with the founding team and ta ...

We are looking for a founding engineer to build AI agents that save people time. · Building the core product end-to-end across backend frontend and AI systems · Shipping fast owning production and iterating directly with users · Working closely with founders on product direction ...