Kai Siren platform engineer
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Writing

Notes from building the systems behind the work.

Platform engineering, cloud boundaries, developer tools, and the occasional method for thinking with machines.

Stochastic Design Iteration

A pattern for co-authoring a markdown design doc with an LLM: the human is the static guiding force, the LLM is the stochastic writer, and the artifact gets sharpened across many small passes into something more pure and specific than the human would have written alone.

April 2026

Deploying Azure OpenAI via Terraform

An end to end description of how to get Azure OpenAI deployed via Terraform

October 2023

On Permissions Models for Cloud Platform Providers

If I were doing permissions for a cloud platform provider, I'd do them like this!

January 2020

Kai SirenPlatform Engineer