Marco Lenzo

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ChatGPT vs DeepSeek vs Gemini

AI Coding Assistants

ChatGPT vs DeepSeek vs Gemini

AI chatbots have come a long way, and for $20 a month, you now have serious choices. ChatGPT Plus? Gemini Advanced? And what about free alternatives like DeepSeek? After experimenting, I landed on Gemini—and here’s why. Why Not DeepSeek? When DeepSeek R1 launched, I decided to take the

GitHub Copilot Workspace Reviewed

AI Coding Assistants

GitHub Copilot Workspace Reviewed

Discover GitHub Copilot Workspaces, a new AI-powered dev environment. See how it simplifies tasks like documentation, refactoring and project setup. Is it worth a Copilot Pro subscription? Is this the future of coding? Find out here!

No, AI cannot replace developers... yet

No, AI cannot replace developers... yet

In recent months, we’ve been bombarded with claims that Artificial Intelligence (AI) is revolutionizing software development. Headlines and social media posts suggest that AI allows developers to achieve in hours or days what once took weeks or months. Some Fortune 500 companies even claim they will soon replace a

Docker Basics Tutorial

Docker Basics Tutorial

These exercises are designed to complement the Docker Basics lab you should have completed earlier, offering additional hands-on practice to reinforce your understanding of key Docker concepts. By working through these tasks, you’ll gain deeper insights into: * Running and managing containers with real-world examples like MySQL and Nginx. * Configuring

VMs vs Containers: Solving Deployment Challenges

Kubernetes Essentials Course

VMs vs Containers: Solving Deployment Challenges

Welcome to the first lesson of the Kubernetes Essentials Course! 🚀 In this article, we’re diving into the challenges that physical servers and virtual machines (VMs) were designed to solve and why containers emerged as the next evolution in application deployment. By the end, you’ll have a clear understanding

How a Kubernetes Service with No Selector Simplified My Workflow

DevOps and Platform Engineering

How a Kubernetes Service with No Selector Simplified My Workflow

Did you know Kubernetes can manage TLS certificates for applications running outside the cluster? If this is news to you, you're in for an insightful tutorial! This guide explains how I use Kubernetes to route traffic and manage certificates for external applications, solving key challenges along the way.

Inversion of Control (IoC) Explained | Spring and Clean Architecture

Software Architecture

Inversion of Control (IoC) Explained | Spring and Clean Architecture

Inversion of control is one of the most important concepts in object-oriented programming that forms the base of popular architectures like the onion, hexagonal and clean architectures. In this article, I’ll answer the following questions: * What's Inversion of Control? * How is it implemented in the Spring framework?

How to secure a Kubernetes Nginx Ingress with Basic Auth

DevOps and Platform Engineering

How to secure a Kubernetes Nginx Ingress with Basic Auth

There are scenarios where we want to expose services outside our Kubernetes cluster that do not have proper authentication and authorization baked in. In these particular cases, it is possible to enable Basic Auth at the Ingress with few simple steps. Note that this tutorial is specific to the Nginx

Kubernetes Architecture Explained

DevOps and Platform Engineering

Kubernetes Architecture Explained

How does Kubernetes work? And what makes it so successful? Despite its popularity, few software engineers have a good understanding of the inner mechanisms of Kubernetes such as declarative APIs and control loops. In this post, I’ll break down the Kubernetes architecture and highlight key aspects that have made

How to integrate cert-manager with Let's Encrypt and Cloudflare

How to integrate cert-manager with Let's Encrypt and Cloudflare

If you're looking to automatically issue and renew certificates using cert-manager and Let's Encrypt for a domain record managed and proxied by Cloudflare using Full (strict) TLS, you're in the right place. The process is straightforward, and you'll have everything set up

EP6: Entities vs Value Objects: Which one is better?

Software Architecture

EP6: Entities vs Value Objects: Which one is better?

Deciding whether something should be an entity or a value object can be tricky even for developers experienced in domain-driven design. In this issue, I'll clarify the differences so we understand these concepts once and for all! Let's get started! Entities and Value Objects as Classes

Spring Boot and GraalVM Native Images: A Match Made in Heaven?

Software Architecture

Spring Boot and GraalVM Native Images: A Match Made in Heaven?

In this article, I’ll share my experience with Spring Boot and GraalVM Native Images. We'll compare 'Just In Time' and 'Ahead Of Time' compilation, explore Spring Boot's support for both, and determine if Spring Boot and GraalVM are a match made

Is the NEW JetBrains AI better than GitHub Copilot? | My AI Setup July 2024

AI Coding Assistants

Is the NEW JetBrains AI better than GitHub Copilot? | My AI Setup July 2024

On the first of July, JetBrains announced improved code completion in their AI Assistant, so I subscribed to test it out and save you some time and money. Is it going to be better than Copilot? Let’s discover it in the next few minutes! Setting up To try out

Eventual Consistency for Beginners

Software Architecture

Eventual Consistency for Beginners

In this article, we will answer the following questions: What is eventual consistency? Is it better than strong consistency? And do we have any other option? Let’s discover it in the next few minutes! Strong Consistency Defined Strong consistency guarantees that read operations receive always the most recent data.

Building Git with DDD and Clean Architecture

Software Architecture

Building Git with DDD and Clean Architecture

In this article, I want to show you how I apply domain driven design (DDD), as well as clean, onion and hexagonal architectures concepts when I design and code a simple application. Rather than giving you a set of rules or definitions, I will explain what my thinking process is.

The highest API Security Risk: Broken Authorization

Software Architecture

The highest API Security Risk: Broken Authorization

Authorization is difficult to implement and test because it’s multi-dimensional and requires a deeper understanding of our APIs. In this article, I’ll explain how authorization is broken and what we can do to protect our systems.

Codeium: The best GitHub Copilot Free Alternative

AI Coding Assistants

Codeium: The best GitHub Copilot Free Alternative

This week I discovered Codeium: a very good alternative to GitHub Copilot. It’s free for individual developers. It’s very responsive and enterprises can also host it on their own infrastructure. Let me tell you more. 18th Dec 2024 Update: GitHub just announced a free tier for Copilot! 😁 More

Broken Authentication Explained | OWASP API2:2023

Broken Authentication Explained | OWASP API2:2023

Despite many developers and teams feel confident about the security of their APIs, Broken Authentication is still one of the top API security risks according to the Open Worldwide Application Security Project (OWASP). In this article, we will understand why this issue is still so common and how we can