Engineering Deep Dives
Detailed write-ups of real engineering challenges: the problem, the constraints, the trade-offs, 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, but not whether it's worth retrying. That decision lives in the gap between the code and the truth.
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 require you to think forward and backward at the same time. Here's the expand-and-contract pattern that got us through it at Grab.