Why shouldn't we test the implementation? How to decouple our tests from the code? What is the reason to add a new test? Why is mocking a code smell? In this article I will try to find answers to those questions.

Blue-Green Deployment is a very good technique that has been successfully used for managing releases of cloud applications. Now it's time to rethink it a bit for serverless systems.

Is it even possible to roll microservices back?

Talking about serverless microservices, functions are the basic building blocks of the service functionality. How to design them from the code and deployment perspektive?

Testing serverless systems is hard. In this article, we will discuss some practices which work well for my project.

Implementing a SaaS as a multitenant system brings a lot of benefits. As usual, there are some tradeoffs, too. For example security becomes more complex. Let's take a look at possible approaches when implementing security in a multitenant architectrure.

What's the difference between queues and topics in AWS? It's not as obvious as it seems to be...

How to design a standalone program that produces a big amount of binary data, and what are the pitfalls of the approach?

When one-thread-access for synchronized methods is too restrictive, semaphores come to mind.

It's recommended to avoid any asynchrony within the scope of the test. Unfortunately, this is not possible everywhere.