All in one comprehensive guide through core machine learning model metrics. A few lessons learned from working with machine learning models. — Correctly evaluating model performance is a crucial task while working with machine learning. There are quite a few metrics that we may use to do so. For someone who just started the journey in this field that can be problematic — at least it was for me. I will start…

Deep dive guide throughout processes of obtaining Access Token in OpenID Connect. — In today’s text I will describe and explain OpenID Connect Flows. The processes of authentication described in OpenID Connect specification. As OpenID Connect is built upon OAuth part of the concepts below will have the same meaning as in case of OAuth. …

Deep dive guide throughout processes of obtaining Access Token in OAuth. — In today’s text I will describe and explain OAuth Grant Types — the processes of authorization. I will start with a quick recap of most basic OAuth roles. Table of Content · Recap of OAuth Roles · What is Grant Type? · OAuth Grant Types · Grant Types Lexicon ∘ Authorization Code ∘ Implicit ∘ Resource…

Comprehensive guide through the most commonly used web security standards — Nowadays there is no need for stressing the importance of web applications security. Almost on a weekly basis, we hear about new security breaches, data leaks, and other security failures. Of course, web applications vulnerabilities are responsible only for some of them. …

A bunch of general ideas for questions software engineers may ask their future employers to determine if the company is the one. — During the whole recruitment process, we are asked a lot of questions to prove our skills as software engineers. This is understandable, as each company wants only the best employees from perspective of their more or less sane — criteria. It is equally understandable that we, as engineers, also want…

A monad is a concept originating from a part of mathematics called category theory, not a class or trait. In this article, I will try to explain its structure and inner workings. With the use of Optional from Java, I will try to describe all of this in a more…

Have you ever thought about how JVM internally — why HotSpot is even called HotSpot or what is the Tiered Compilation and how it relates to Java? Answering such questions will be the main focus of today’s article. …

Quite long ago around the year 2014 Java 8 was released bringing the new standard to the Java ecosystem. One of the features included in this release was an Optional. Simple yet very useful class for handling nullable objects and values. Quick time skip to year 2023 and Optional, consists…

Sharding is a technique of splitting some arbitrary set of entities into smaller parts known as shards. It is used to achieve better consistency and reduce contention in our systems. In this article, I will tell you a few more things about sharding which despite its significance, also has some…