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Building a server monitoring SaaS on Cloudflare Workers — architecture, decisions, mistakes

TL;DR Pulse is a server monitoring SaaS I built as a solo founder for Latin American small businesses. It runs entirely on Cloudflare Workers + Turso (libsql) + R2, with a Go agent that installs on…

  • Pulse is a server monitoring SaaS for Latin American small businesses
  • Built entirely on Cloudflare Workers, Turso, R2, Workers AI, Resend, Telegram Bot API, and Stripe
  • Aims to provide sub-second alert latency at the edge with a fixed monthly price

How 500 Concurrent HN Connections Took Down Peakd.io - and How I Rebuilt the Infrastructure

A few weeks ago I posted Peakd on Hacker News, and ~500 concurrent connections took the site down in under a minute. The failure: a single Express instance, no HTTP cache, no connection pooling…

  • 500 concurrent connections caused outage on Peakd.io
  • Single Express instance lacked caching, pooling, and rate limiting
  • Rebuilt infrastructure with Varnish, PgBouncer, and Redis caching

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