How was the system scaling carried out in your last project?

In my last project, system scaling was achieved horizontally — by adding new servers to distribute the load. Load balancers were used to evenly distribute requests among application instances.

The following approaches were also applied:

• Caching frequently requested data to reduce database load.
• Using asynchronous task processing to improve responsiveness.
• Dividing the database into sharded parts to increase throughput.

This approach allowed for stable system operation as the number of users grew.