Finally completed it!
Presenting you CanvasFlow
- 8 core drawing tools
- Create, move, and resize shapes
- Infinite canvas, pan, and zoom
- Real-time collaboration
- And much more stuff
Live Link: canvas-flow-web.vercel.app
Aman retweeted
500K people online in a server. Someone sends “hello”.
500K deliveries? No. About 500. Publish once per gateway, fan out locally in memory.
Also covered:
Snowflake IDs for ordering
Time-bucketed Cassandra partitions
Bitmask permissions
Do read-
Aman retweeted
71 articles. 750+ stars on GitHub.
What started as a way to keep my articles from getting buried in my timeline has turned into a repo people actually use to learn system design, backend engineering, distributed systems, and microservices.
Just added the latest HLD breakdown: Design Discord. Real-time messaging, servers and channels, presence, and scaling to millions of concurrent users.
What’s inside the repo:
30 HLD breakdowns (YouTube, Netflix, Spotify, Instagram, Amazon, Discord, and more)
LLD classics like parking lots and vending machines
Backend fundamentals: APIs, databases, caching, concurrency
A complete Distributed Systems series
A complete Microservices series
AI content, just getting started
Everything is indexed by category in plain markdown, readable straight on GitHub. No setup, no login.
Thank you to everyone who read, starred, shared, and sent feedback. You’re the reason I keep writing.
More HLD, DevOps, and AI articles are on the way.
github.com/harshit3011/Techn…












