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How to Customize Obsidian and Make It Your Own

Learn how to personalize Obsidian with themes, custom CSS, and layout tweaks to create a comfortable and efficient note-taking environment that fits your workflow.

Miguel Aréjula Aísa

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Why I Use Obsidian, My Personal Notes Workflow

Why I trust Obsidian for every note. See my personal workflow and how the simplicity of Markdown and plain text files offers unmatched speed, longevity and flexibility compared to Notion.

Miguel Aréjula Aísa

Setup

Build a VS Code Extension with React & TailwindCSS: Step-by-Step

Learn how to create a modern VS Code extension with a React + TailwindCSS webview. This guide walks you through initializing the extension, configuring Vite and Tailwind, integrating React for UI, and running your extension in VS Code, providing a fast, interactive, and fully typed TypeScript setup.

Miguel Aréjula Aísa

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From Idea to Marketplace: Building My First VS Code Extension (CSV Table Viewer)

How I built and published my first Visual Studio Code extension; CSV Table Viewer, a simple tool to preview CSV files as clean tables directly inside VS Code. In this post, I’ll share the idea, development process and how you can publish your own extension too.

Miguel Aréjula Aísa

LearnPortfolio

Your First Steps in Data Science with Python

Learn the basics of data science with Python, from loading and exploring datasets to visualizing data and performing simple analyses in Jupyter notebooks.

Miguel Aréjula Aísa

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Your First Jupyter Notebook in VS Code on macOS

Learn how to install Jupyter Notebooks on macOS, set them up in VS Code and start writing interactive Python code for data analysis and visualization.

Miguel Aréjula Aísa

Setup

Discover Neovim: The Modern & Customizable Evolution of Vim

Learn what Neovim is, why developers are switching to it and how its modern features and customizability can boost your coding workflow.

Miguel Aréjula Aísa

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Meet Vim: The Powerful Editor Every Developer Should Know

Learn what Vim is, why developers love it and how to master its essential commands to boost your coding productivity.

Miguel Aréjula Aísa

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How to Set Up Your Terminal for Productivity and Style

Learn how to create a powerful and beautiful terminal environment from scratch; from choosing a shell and prompt to configuring colors, fonts and tools.

Miguel Aréjula Aísa

Setup

Modular Monoliths vs Microservices: Choosing the Right Architecture in 2025

A practical guide comparing modular monoliths and microservices, helping developers choose the right architecture for their team, product, and scaling needs.

Miguel Aréjula Aísa

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What I Wish I Knew Before Starting Informatics Engineering

Practical advice for Informatics Engineering students: from using Git and GitHub early, to self-learning, building a portfolio, and preparing for the professional world.

Miguel Aréjula Aísa

Setup

Clinical Pathway Optimizer: Improving Hospital Protocols with Formal Methods

A web-based system to digitize, monitor, and validate clinical pathways in real hospitals, developed as part of my Computer Engineering Bachelor's Thesis.

Miguel Aréjula Aísa

Portfolio

PlayBeat: Music Collaboration Platform

PlayBeat is a full-stack web application designed to facilitate music collaboration among artists. Built with Astro, Express, PostgreSQL and Azure. It offers features like real-time playlist management, upload and sharing of music files and a user-friendly interface for artists to connect and collaborate.

Miguel Aréjula Aísa

Portfolio

AgroNET: Smart Agriculture Platform

AgroNET is a full-stack web application designed to modernize agricultural practices through smart features and real-time data integration. Built with Astro, React, Node.js and AWS, it offers crop management, weather tracking, and community forums for farmers and agronomists.

Miguel Aréjula Aísa

Portfolio

Adding Google & GitHub Login to Your Astro Project

Want to let users sign in with their Google or GitHub account? This step-by-step guide shows you how to implement OAuth authentication in an Astro project using modern best practices.

Miguel Aréjula Aísa

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Getting Started with Tailwind CSS: Utility-First Styling for Modern Web Apps

Discover how Tailwind CSS makes it easier and faster to build modern, responsive websites. In this beginner-friendly guide, you'll learn what Tailwind is, how it works, and how to integrate it into your project with real examples and best practices.

Miguel Aréjula Aísa

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Integration Testing, Why and How to Do It

Learn what integration testing is, why it’s essential for building reliable applications, and how to perform it manually with Postman. Then take it a step further by automating your tests using Postman collections and Jest in a Node.js environment.

Miguel Aréjula Aísa

Learn

Git for Beginners: The Essential Guide

Learn Git from scratch with this basic guide. Understand the fundamental concepts and how to integrate it with GitHub and VSCode.

Miguel Aréjula Aísa

Learn

Protecting Astro Forms with reCAPTCHA v3

Learn how to integrate Google reCAPTCHA v3 into your Astro site to prevent spam without annoying your users. A practical guide to secure static form submissions.

Miguel Aréjula Aísa

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Introduction to Authentication in Node.js with JWT

Learn how to implement JWT authentication in a Node.js application with Express.js. This beginner-friendly guide walks you through creating login routes, generating JWTs, and securing your APIs.

Miguel Aréjula Aísa

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Testing for Beginners: Getting Started with Jest in Node.js

Learn how to write your first unit tests using Jest in a Node.js project. This beginner-friendly guide covers setup, writing basic tests, testing async code, and more.

Miguel Aréjula Aísa

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Mastering API Documentation: Why It Matters and How to Use Swagger with Express

API documentation is the backbone of seamless software integration and developer collaboration. In this guide, wou will explore why API documentation is crucial and how Swagger can simplify and standardize the process in Express applications.

Miguel Aréjula Aísa

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Create your first Astro project

Learn how to set up your first Astro project. A step-by-step guide to create a new Astro project.

Miguel Aréjula Aísa

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Create your first API REST with Express.js

Learn how to set up your first API REST using Express.js. This beginner-friendly guide walks you through the fundamentals, from routing requests to structuring your code with controllers, models, and views.

Miguel Aréjula Aísa

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Start your first Full stack project

In this post, I share my recommendation to build your first full-stack project; combining both front-end and back-end technologies to create a fully functional application.

Miguel Aréjula Aísa

Learn

My Terminal Configurations

My collection of Terminal configurations to boost productivity and enhance its appearance.

Miguel Aréjula Aísa

Setup

My Favorite VS Code Shortcuts for macOS

My collection of Visual Studio Code shortcuts to boost productivity.

Miguel Aréjula Aísa

Setup