X Timeline Architecture

I was reading Designing Data-Intensive Applications and kept thinking: I should build this, not just read about it.

This is a working demo of how a social media timeline (like X/Twitter) can work at scale. It implements both fan-out-on-write and fan-out-on-read so you can see the trade-offs firsthand. How high-follower accounts behave differently, how read-heavy and write-heavy workloads push you toward different designs.

Built in Go with clarity over production-readiness. The point was to internalize the concepts by getting my hands dirty, not to ship a Twitter clone.