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What we learned building the things we ship. Written by the people who shipped them.

GoDistributed Systems

Why Mesh assigns sequence numbers on the server

Client-side ordering looks fine until two people type at once. Here's the failure we designed Mesh's sequencer to make impossible.

4 min read
AIArchitecture

Models narrate. Code computes.

The rule that keeps AI features from lying to users about their own money — and how we enforce it in Spanzo.

4 min read
InfrastructureDevOps

Spend your novelty budget on the product

Why our infrastructure is deliberately unfashionable, and what we buy with the attention we save.

3 min read

Engineering notes, occasionally.

What we learned building the things we ship. No cadence, no marketing — we write when there's something worth saying.