Engineering at Halcyon

Technical deep-dives, architecture decisions, and lessons from building a global edge platform.

Infrastructure

How We Reduced Cold Starts by 94%

Our edge runtime was hitting 1.2s cold starts under load. Here's how we restructured our isolation model and pre-warming strategy to get that down to 68ms at p99.

Engineering

Why We Switched from Postgres to TiKV

After two years on Postgres, we hit scaling walls we couldn't architect around. This post covers our evaluation process, the migration, and what we learned.

Culture

Our On-Call Philosophy

On-call doesn't have to be miserable. We share our rotation principles, compensation model, and why blameless postmortems changed everything.

Product

Introducing Halcyon Edge Runtime

A lightweight, V8-based execution environment that deploys your code to 280+ locations in under 50ms. Now generally available on all plans.