One Concept at a Time! From coding basics to Advanced System Design. Learn System Design every week. Read what engineers from uber, Google, Microsoft and Amazon are reading.
latest posts
database sharding
+4
Sep 6, 2026
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5 min read
Cross shard joins, unique constraints, and the shard key you cannot undo cheaply.
Job Openings
Sep 3, 2026
1 min read
6 India and 6 Remote roles: Stripe, Airbnb, Databricks and more
write ahead log
Aug 31, 2026
Your commit is durable before your table is, and that is on purpose
Aug 30, 2026
4 min read
Aug 29, 2026
6 India + 6 Remote : Coinbase, DevRev, Sarvam AI & more
interview preparation
Aug 27, 2026
6 min read
Every pay component at L3, L4 and L5, plus the six point rating scale that decides which level you land on.
coding interviews
Aug 26, 2026
There is one point in this breakdown almost nobody talks about. It's at the end.
Aug 24, 2026
Anthropic's meeting bot assigns your action items to Claude agents automatically.
websockets
Aug 22, 2026
How Netflix, Slack, and Discord chose their real time protocols
RAG
Aug 21, 2026
One approach costs $10. The other costs $50,000. Here's when each one wins.
AI Engineering
Jul 5, 2026
Traffic distribution vs traffic management, and when you need both.
Jul 4, 2026
Most teams use only one. The best teams combine three.
Jul 1, 2026
Inside the 3 agent pipeline that handles code migrations at scale
Jun 29, 2026
They cut database nodes by 60% and made reads 8x faster.
Jun 27, 2026
Performance benchmarks, cost traps, and a decision tree for picking the right one