What decisions have you had to make regarding replacing or adopting new technology stacks? Provide an example.

In one of our projects, we faced scalability and performance issues with the old stack, which used Spring MVC and monolithic architecture. We decided to switch to a microservices architecture using Spring Boot and Spring Cloud.

Main steps:

• Analyzing existing code and identifying services by business functions.
• Implementing containerization with Docker for easier deployment.
• Using Kafka for asynchronous message exchange between services.

This allowed us to improve fault tolerance, simplify maintenance, and accelerate the development of new features. The implementation was gradual to minimize risks.