Most developers bolt on multi-tenancy after the fact — and pay for it in production. Here's the decision framework I use upfront: shared schema vs. schema-per-tenant, row-level security in Postgres, and why your auth layer is the load-bearing wall.
The schema decision you make on day one will constrain your architecture for years.
Read articleSSE handles 80% of real-time use cases with a fraction of the infrastructure complexity — yet teams default to WebSockets out of habit. I break down exactly when bidirectional sockets are worth the cost, and when a simple event stream leaves your backend cleaner and more observable.
If your server only pushes data and the client only reads it, you don't need a WebSocket.
Read articleA missing compound index on a 2M-row collection caused a 4-second API response on a route that should have taken 40ms. Walk through the full post-mortem: how we diagnosed it with the MongoDB profiler, what the query plan revealed, and the indexing strategy we now enforce on every project.
COLLSCAN on a 2M-document collection is a 4-second response waiting to happen.
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