Building a product that scales from a handful of users to millions isn’t about pulling some magic architecture out of thin air. It’s about knowing what really matters at each stage and not wasting time on stuff you don’t need yet.
This article breaks down the journey from 0 to1M users step by step, what to focus on, what tech choices make sense, and when to level up your stack.
0 to 100 Users: Just Ship It
At this stage, your goal isn’t scale, it’s speed of development. You want to validate the idea, get feedback, and iterate fast. Over-optimizing early wastes time and slows you down.
Tech Requirements
Infrastructure
Single server (monolith): One machine running everything : app, database, and static assets.
Keep it simple to deploy and easy to debug.
Database
One relational database like PostgreSQL or MySQL.
No need for sharding, replicas, or complex schemas yet.
