What databases have you used in your work?

Most frequently used:

• PostgreSQL: Relational, powerful, with ACID support, PostGIS extensions, and JSONB capabilities.
• MySQL: Relational, popular, reliable, well-suited for web applications.
• SQLite: File-based, simple, convenient for small projects and testing.

Also had experience with:

• MongoDB: Document-oriented database, flexible schema, scalable.

Interaction with them was mainly through ORM, such as SQLAlchemy and Django ORM.