Data Engineer

What problems can tracing identify?

Were there any issues with OpenAPI when transitioning from Spring Boot 2 to 3?

What are the main components of a trace message (span)?

What is VACUUM in PostgreSQL? What types are there? Can it be used in production?

What are dead rows in a database?

What are the advantages of the Strategy pattern when refactoring this code?

What tracing tools have you used? In Spring Boot 2 and Spring Boot 3?

Do indices always speed up performance or can they cause degradation?

Does the tracing show only REST requests or something else?

What is semantic versioning? When to bump major, minor, patch?

Tell us about your migration experience from Spring Boot 2 to Spring Boot 3.

What indexes do you know in PostgreSQL?

Kafka task: producer sends price changes (200 rubles, then 300 rubles), consumer is replicated in 3 pods. Will there be problems in default configuration?

What is tracing? Do you have experience working with it?

Have you worked with JWT tokens? What blocks do they consist of?

How to provide a mobile client access to the same orders but with a reduced set of fields? What is BFF?

Design task for microservices architecture: how to provide data for an orders table (products, prices, orders) to the frontend with three separate microservices?

Do you have experience optimizing SQL queries? Please provide an example.