Field notes
Long-form write-ups of problems I owned end to end: the constraints, the trade-offs I weighed, and what I shipped.
An outbound call campaign asks one question after every call: do we try this number again? The webhook tells you what happened, not whether it's worth retrying. This is how the platform makes that call.
Building an OIDC-compliant SSO server that plays both sides of the protocol, and why sitting between two trust boundaries is harder than picking one.
How I designed stream-per-domain isolation to prevent tenant cross-contamination in a production AI messaging platform.
Zero-downtime migrations mean thinking forward and backward at once. The expand-and-contract pattern got us through a 3-million-row change at Grab.