Founding Product Engineer in London

Your Impact

Most of what a customer experiences of HelmGuard, you'll have built. You turn ideas into shipped product faster than anyone expects, across the whole stack, and you decide what's worth building as much as you build it. We're betting that AI collapses the cost of writing software and you're the proof that the bottleneck was never the code, it was the judgment about what to make.

The Role

You are not expecting to be handed a finished spec and you own outcomes, not tickets. You understand our platform and what our customers want, and you decide what is actually worth building, design it, and ship it end-to-end: the interface someone loves to use, the API behind it, and the agent-powered feature underneath it. Some weeks, that's a polished onboarding flow; some weeks, it's the data model for a new analytical engine; some weeks, it's wiring an agent into a customer's workflow.

You're at your best when the work refuses to sit in one lane. The bar isn't that the code is clean, but rather that you built the right thing, customers feel it, and it shipped while the problem was still worth solving. You make all three true, with Claude Code as a force multiplier that lets you move at a pace that once required a team.

What You Will Do

• Ship customer-facing product end to end — frontend, backend, and the agent-powered features in between
• Own features from "is this even worth building?" through design, build, and the messy reality of customers using them
• Work close to customers and FDEs, and turn what you hear straight into shipped product
• Bring product and design taste — you care how it feels, not just whether it compiles
• Move fast with Claude Code and the rest of the AI tooling we run, without shipping anything you'd be embarrassed to take into a security review
• Leave the codebase better than you found it as you move through it

What You Bring

• 6+ years shipping production software across the stack in a small, fast-moving team — TypeScript ideally, or an adjacent stack with the appetite to switch
• A track record you can point to: things you decided on, built, and watched customers actually use
• Genuine product instinct — you can tell the difference between impressive and useful, and you optimise for useful
• Front-to-back range: a React UI a customer enjoys, and the API and data model that make it real
• AI-native working style: Claude Code is already in your daily loop, and you have opinions about where it earns its keep and where it doesn't
• High agency — you see the gap, you close it, you don't wait to be told

Nice to have

• Real design chops — you can make something look and feel right, not just function
• Experience folding LLM features into a product (agents, AI‑fill, that class of work)
• B2B SaaS, GRC, security, or another domain where the user is a professional with zero patience for friction
• Early‑stage or founding‑team experience

Working at HelmGuard

Location: King's Cross, London (Gridiron building). We're built around in‑person collaboration and expect most days to be in‑office, with flexibility for the days that need it.

Compensation: Top decile for the London market, with meaningful EMI‑eligible options.

Perks: Daily team lunch and specialty coffee, a roof terrace overlooking King's Cross, on‑site showers for those who enjoy active commuting, and serious per‑engineer AI tooling and API budgets.

Tech Stack: TypeScript, Node.js, React, Tailwind, OpenAPI, Express, Azure (Container Apps, Service Bus, Front Door, Entra ID), Postgres, Terraform, GitHub Actions, Docker. Anthropic‑first AI with in‑house evals and scaffolding. Claude Code throughout.