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Fri, April 24, 2026

29 min read

Event sourcing on Cloudflare Workers and Durable Objects

#cloudflare #architecture #Rust

I rebuilt the backend of FernLabour on Cloudflare Workers and Durable Objects in Rust. The result is an event-sourced system where each labour runs inside its own Durable Object with its own SQLite event store, projections, and WebSocket subscribers.

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Sun, July 13, 2025

15 min read

The Quest for Exactly-Once Event Delivery: Part 2

#Python #architecture #events

The adventure continues. In our last post we started the quest for the holy grail of distributed systems - Exactly-Once delivery. We tackled the first half of the problem by building a reliable producer with a transactional outbox...

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Sat, June 7, 2025

10 min read

The Quest for Exactly-Once Event Delivery: Part 1

#Python #architecture #events

We’re about to go on a bit of an adventure, I’m not sure how difficult it’s going to be (or if it’s possible), but I’m going to learn some things, and maybe you can learn some things too...

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