Modeling a Pub/Sub API System with F# and CQRS (on a Micro Scale)

on YouTube ↗01h 07m

" summary

Presents an F# + CQRS design that implements a single readable domain model handling both request/response and pub/sub over HTTP, WebSockets and AMQP. Describes a concrete system using Kafka and RabbitMQ for streaming/delivery guarantees, an in-memory DB with checkpoints, and property-based testing plus nbomber for reconnection and cluster tests, applied to live sports streams servicing ~4000 operator terminals to reduce integration friction and improve reliability.

AI-written summary · about

" chapters (6)

1. 0:00Pub/Sub system modeling
2. 10:15CQRS simplifies design
3. 20:34Domain modeling in F#
4. 31:34Testing CQRS systems
5. 43:49Q&A: Performance trade-offs
6. 1:00:42Summary

" related talks

• 43mCommander: Better Distributed Applications through CQRS and Event SourcingBobby Calderwood · Strange Loop 2016
• 01h 25mBuilding microservices with event sourcing and CQRSMichael Ploed · SpringOne2GX 2015
• 44mFrom REST to CQRS with Clojure, Kafka, & DatomicBobby Calderwood · Clojure/conj 2015
• 43mKey-Value, Event-Sourcing, Cqrs, Pub/Sub as a Service, Java, JavascriptHugh McKee · DevDays Europe 2022
• 56mDeveloping Event-driven Microservices w/Event Sourcing and CQRSChris Richardson · Philly ETE 2015
• 46mMicroservices Data Patterns: CQRS & Event SourcingEdson Yanaga · Voxxed Days Bucharest 2018
• 26mImplementing Event-Driven Microservices Architecture (...)Nikhil Barthwal · Lambda Days 2017
• 58mAsync messaging deep dive with Dapr, take your pub/sub skills to the next level 📨🚀Marc Duiker · NDC Copenhagen 2025