alteam
Founding Product Growth Engineer
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An exciting opportunity to join a pre-seed AI native startup founded by an exited founder.
We're hiring their Founding Product Growth Engineer. London, hybrid two days a week. £75,000 to £85,000 plus equity and benefits.
You own the loop between what gets shipped and whether it worked. You instrument the funnel, build and run the experiments, and come back with a clean verdict rather than a dashboard for someone else to interpret.
THE COMPANY
They're building the senior AI employee for small business owners. It connects to the tools they already use, watches what they commit to, and drafts the work they owe: client updates, proposals, reports, built from their real numbers and business context, ready to approve. No prompting, no setup. You'd be their first dedicated growth hire!
THE ROLE
Roughly 70% building, 30% analysis. You're full-stack, comfortable in the data, and you decide what to build next without a PM handing you a spec. This is a builder's seat, not a manager's. You'll sit closest to both the customer and the codebase, and you'll bridge go-to-market and engineering in a way nobody on the team does today.
WHAT YOU'LL OWN
- The activation funnel, end to end. Instrumentation, finding where users lose momentum at signup, onboarding and activation, and shipping the fix yourself.
- The experiment framework. Hypothesis, design, A/B tests behind feature flags, rollout, and the statistical read: sizing, significance, guardrails.
- Tracking the team can trust. A clean Amplitude event taxonomy tied to every ticket, and SQL you write yourself. A gap in the data is yours to fix, not someone else's to flag.
- Retention and growth loops. Nudges, lifecycle messaging and re-entry flows, plus the invite and sharing loops that turn one user into their whole team.
- Fast surface features. CTAs, banners, empty states, connector onboarding fixes. Shipped in days and measured immediately, not queued behind a roadmap.
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No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.
WHAT WE'RE LOOKING FOR
- You think like a founder. You care about the business number, not the feature, and you find the highest impact bet yourself. Bonus if you've built and shipped something of your own.
- You've shipped growth features at a B2B or prosumer company, activation flows, experiment frameworks, re-engagement mechanics, and you can point to what moved.
- You have real funnel optimisation and A/B testing experience. You've designed the test, read the result honestly, and killed your own idea when it didn't hold up.
- You are a senior IC who operates without direction. You write clean reviewable code, and you know when a fix belongs in an experiment and when it needs to go through the tech lead properly.
STACK
Required, and the category matters more than the specific tool:
Get help with your application
Your very own career expert that helps elevate your application to the next level.
- Agentic coding tools daily such as Claude Code or Cursor
- Feature flags and experimentation such as GrowthBook, PostHog or Statsig
- Product analytics such as Amplitude or Mixpanel where you design the tracking plan rather than just query it
- Lifecycle messaging such as Customer.io, Braze or Knock
- Invite and sharing loops
- TypeScript and React in production
- SQL, and APIs in GraphQL or REST
Nice to have:
- Design engineering and taste for the surfaces you ship
- Chat native products in Slack or Teams
- OAuth integrations and connectors
- LLM and agent products including prompt engineering and evals
- Observability
THE DETAILS
- Full time, permanent, flexible hours
- Two days a week in the London office
- You'll need the right to work in the UK. We can't sponsor visas for this role
- Four stages: intro call, technical and product conversation, practical working session, founder conversation
HOW TO APPLY
Apply here or email info@alteam.io with your CV and LinkedIn, plus anything that shows how you think and build: GitHub, a portfolio, products you've shipped, or a growth experiment you ran.
Alteam is the talent partner for this search. We read every application ourselves and tell you exactly who the company is on the intro call.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
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