Summary
✨ AI‑Generated
An early-stage founding engineering opportunity for a highly autonomous principal-level developer who combines full-stack ability with deep security awareness and AI-native development practices. You will help shape technical direction, architecture, and engineering culture while solving difficult problems where software development and application security intersect.
Highlights
Founding-level technical role with broad ownership and significant engineering judgment. The position combines full-stack development, AI-native engineering, application security, and the opportunity to shape architecture and engineering practices from an early stage.
Description
Founding Engineer (Full Stack, AI Native) LeoTrace · London HQ · Remote or Hybrid · Open to Europe and India
🦁 We're making security something engineers actually enjoy.
Security happens downstream.
A scanner finds the flaw days later, and someone has to read the finding, understand code they have moved on from, write the fix and get it reviewed.
Agents made that queue grow faster than any team can clear it.
LeoPrevent runs inside the coding agent, and the agent fixes the problem in the turn that wrote it.
The flaw never becomes a detection, a ticket, or a backlog for somebody to work down.
Any agent, any model.
No pipeline changes, no gate.
Developers get corrected code back and carry on.
Pre-seed, backed and building.
Thirty years between us of research and ethical hacking inside Tier 1 banks, and every vulnerability class we handle is one we have exploited ourselves.
The role
We are hiring your judgement, not your typing speed.
Coding is a given at this level.
You will pair with our founding engineer on everything the customer touches: the dashboard, the plugin, the onboarding, the APIs and the platform underneath them.
Own product features end to end, from the interface down to the services behind it.Build the surfaces that make the work visible: what agents got wrong, what got fixed, which repos carry risk.Build the rollout path, and make it hold up under a bank's security review.Work directly with the engineering teams running it, and the security leaders buying it.Make architecture calls on a team of eight, with no committee and no roadmap theatre.
What we need
4+ years shipping production software.Full stack.
Comfortable owning a feature from the interface to the services behind it.Go, MongoDB, AWS or Azure, GitHub Actions.
We do not screen on language, we screen on whether you can pick one up.Enough application security to build for it.
You do not need to have written a scanner.Real AI engineering experience: evals, context design, agent tooling.
You have built with models, not just used them.Proactive.
You pick the problem and go.
The one deal breaker
Being AI ignorant.
If you think agents are a toy, or you have never bothered to find out where they break, this is the wrong role.
Equally, this is not a role for pushing prompts at a problem and shipping whatever comes back.
We are hiring creative thinking and problem solving.
The code is the easy part.
The deal
Eight people against a category, so it is all hands on deck and it is not a nine to five.
We are not pretending otherwise.
The upside is the point: EMI options, real ownership, and a say in what gets built.
It is also why we win by working smarter rather than longer.
London HQ, remote or hybrid, and we will hire across Europe and India for the right person.
We hire for talent, drive and judgement.
Everything else is noise.
