List the databases and message brokers you have worked with, and rate yourself.

Worked with various databases and message brokers:

• Databases:

  • PostgreSQL — experience with relational data, complex queries, and optimization.
  • MongoDB — for document storage and flexible schema.
  • Redis — for caching and fast key-value operations.

• Message brokers:

  • Apache Kafka — for stream processing and microservices integration.
  • RabbitMQ — for task queues and asynchronous communication.

I consider myself a senior in working with these technologies, capable of designing architecture, optimizing performance, and ensuring system reliability.