ERP Consultant

What is bloating in PostgreSQL and why does the physical size of the table grow even after data deletion?

Is it possible to write tags like json or gorm in Entity? How does this relate to DDD principles?

Tell about the scheduler in Go — what is it for, what does it consist of?

Can submit be used to run only Runnable or also Callable?

How many microservices were involved in data processing?

What is the difference between an RSA certificate and a GOST certificate?

What are ACID transactions in databases?

How to technically send a message to a Kafka topic? Which class is used for this?

Did you build microservices from scratch or modify existing ones?

What behavioral patterns do you know?

Signing requests: what does it protect against, how to implement it? Who uses a private/public key for signing and verification?

What is the complexity of inserting an element into a HashSet?

What is the purpose of the acks parameter in Kafka settings?

How was the CI/CD process organized? Who was responsible — developers or separate DevOps?

What is the Mediator pattern, have you worked with it?

Tell me about the Circuit Breaker pattern. What is it used for, and what modes are available?

What do you know about the Strategy pattern?

By default, where does CompletableFuture execute?

How long have you been working with microservices?

What is the difference between TLS and mTLS connections?