Scalability
Traffic doubles and the app falls over. The fix is a rewrite nobody budgeted for.
Your busiest day is a good day, not an incident.
How to tell if this is your problem- How we deliver it
- The right backend for the job
- Elixir when a system has to hold thousands of simultaneous users or real-time connections. Node or Go when it does not. We pick per project, not by habit.
- A CDN in front, always
- Pages, images and static assets are served from a network close to your users — a separate layer that absorbs most traffic before it ever reaches your application.
- Postgres, modelled properly
- Indexes and access patterns designed for the query volume you are growing into. This is where most scaling problems actually live, whatever language sits above it.