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teamtailor

Lead Engineer

Buttermilk
London, GBR
Lead
Hybrid
Discovered 6 days ago
bigqueryfastapigcpgithub-actionspythonsql

Full Job Posting

What We Offer

  • Pension, matching contributions
  • Private Medical Insurance
  • Juno Wellbeing Credits
  • Hybrid Working (London)
  • £150 Home Office Setup Budget
  • Night Key Membership
  • Birthday Leave
  • Learning & Development Budget

Qualifications

  • We are hiring at lead level, to build and to stay. There is no senior engineer above you.
  • You have built and scaled a production product to 10,000+ users, and made its architecture calls
  • You ship in vertical slices, fast but without building things that fall over a month later
  • You use AI coding tools every day, can refactor a largely agent-written codebase, and read what the agents produce
  • You have shipped LLM features to production, not just prototypes: structured output, validation, batch versus live calls, cost per item and evaluation
  • You have built for external users: authentication, data isolation between clients, payments and GDPR
  • You build rapport quickly with non-engineers and explain trade-offs plainly
  • You like being in the office with the people who use what you build
  • Strong plus: multimodal AI (video, image, audio); Python and FastAPI; Google Cloud, Terraform and CI/CD; ingestion from third-party APIs; email deliverability; SOC 2; creator-economy or agency experience.
  • Transferable experience counts. If your architecture and scaling experience carries over, the exact stack matters less.
  • You probably won't enjoy this if
  • You want detailed specs before you start
  • You would rather design systems than build and run them
  • You want a specialist for every layer
  • You trust AI-written code without reading it
  • Stack
  • Python services (FastAPI, SQLModel) and a Next.js/TypeScript app on Google Cloud: Cloud Run, Cloud SQL Postgres, BigQuery and Pub/Sub, all in Terraform and deployed from GitHub Actions. It's early enough that you will shape it.

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