John Detlefs

Production systems and debugging war stories

Senior Software Engineer · Reliability & Growth

I build the systems behind the buy button.

Seven years of shipping customer-facing software where downtime costs real money. At GoDaddy I helped evolve the dashboard and account surfaces behind $200M+ in annual revenue, cutting p95 latency and improving experiment quality across millions of sessions. At PwC (via Kunai) I build cloud infrastructure for nine-figure consulting engagements.

Currently at Kunai (PwC Network) as a Senior Cloud Developer. Previously Senior SDE at GoDaddy. Before that: full-stack across IoT (Meshify), crypto, and data tooling.

  • TypeScript / React / Next.js
  • AWS / Cloud Infrastructure
  • Node.js / Rust
  • Observability / SRE
  • Performance / Experimentation