Can you give examples of the most large-scale and long-term projects you have worked on or are familiar with?

Examples of large-scale and long-term projects may include:

• Large web applications with millions of users, such as online stores or social networks.
• Corporate CRM systems that are developed and maintained over years.
• Financial systems with high load and reliability requirements.

If speaking about personal experience, one can mention projects with a long development history, involving multiple teams and utilizing modern CI/CD and testing practices.