// topic

#ChatSystem

2 guides~22 min totalupdated Oct 24, 2026

Design a Chat System: Store First, Then Push (2026)

Design a chat system in a system design interview: connections and gateways, idempotent sends, message order, offline catch-up with cursors, groups and receipts.

Intermediate · 14 min

Software Architecture

Read the guide →

All guides

2 on this page

Intermediate8 minDesign a Chat System: Media, Failure Modes and Follow-Ups (2026) Chat system design follow-ups: presigned-URL media uploads, a failure table per component, encryption, abuse, monitoring, deploys, cost and a 45-minute plan.

Following #ChatSystem?

Get new #ChatSystem guides the day they publish. One email, no spam.