About on João Freitas

The following is a guide on how to debug and monitor an Android application performance impact if the device thermal state increases.

The following article explains the business perspective of building an open-source product, and how it doesn’t mean that the product will be successful by open and free.

The following article explains the new Virtual Threads feature available in Java 21 and how it can also be used in Kotlin.

The following is quick explanation on the differences between shallow and deep copy, and both can be used in Kotlin.

The following is a write-up on how a plane WiFi behaves to control if the user can access the Internet or not.

The following is an introduction/explanation to the “algorithm” that Elon Musk uses to ship products.

The following is an introduction to quadlets, a container manager built in podman, that can be used to replace docker-compose.

The following is a set of guidelines a team can use to discuss the user experience of their product.

The following articles tackles the issue of editing text on mobile devices (both Android and iOS), explaining the pain points around it and how they can be solved.

The following is an interesting take on coding for money, and why the market right now might feel closed because of the pandemic.

The following article explains the why’s and how’s developers feel impostor syndrome, as well as ways to remediate this feeling in an organization.

During 2023 I shared an article I’ve read in my blog.

The following is a story of the scary non automated bureaucratic processes that each country has, specifically in the Departement of Motor Vehicles (DMV) of California.

The following article discusses the metric of “GitHub green squares” in getting a new job at a Tech company for Junior/Interns.

The following is a write-up by Google on one of the major bugs found in Go codebases: reusing variables scoped in for-loops.

The following article provides insights on how Apple’s new language model for suggesting new words as an “auto-complete” feature in a phrase works.

The following article explains how Git stores different versions of files and their internals, using small python scripts.

The following is a story of how Isaac Newton went on to become a warden/guard and defending the royal mint over the years, becoming a detective, saving the economy and throwing countless of counterfeiters to jail and death.

The following is a write-up on how ipai.is built a geolocation database from scratch.

The following is a cheat-sheet for creating diagrams with mermaid.js.

The following article is an introduction to the upcoming blockchain protocol that aims to solve the Intellectual Property (IP) problem on the internet.

The following article tries to convince businesses looking for Software development agencies, to not look at the cost of software as a short term investment, but a long one instead.

The following is a blog post about how it was to participate/run a LAN party in the 2000s.

The following is the story of how HEY suffered a massive influx of hate and disapprove, after they announced the drop of TypeScript for Turbo (a library/framework to build web application with less JavaScript).

The following is a write-up on the success story of Basecamp leaving the cloud.

The following articles explains how the Internet is built on PHP.

The following article provides the basics of thinking in a functional way, by designing an implementing a templating library from scratch, in Kotlin.

The following article explains why null operators in Kotlin are an anti-pattern.

The following is a response to “The Wrong Abstraction” article.

The following article takes on the problem of distributing load/load balancing, critizing the bad usage of randomness for the job.

The following article teaches how you can create a beautiful graph slider with only SVG.

The following is a writeup on how Marginalia, an independent open-source search engine, was able to drill down a RAM and Disk scaling problem, which caused the project an outage of several days.

The following is a step-by-step guide on publishing a Java/Kotlin library to Maven Central repository, going all from registering yourself/organization as an identity in Sonatype, to automating the publising process with GitHub Actions.

The following article teaches how to publish a Kotlin library to JitPack or GitHub Packages, using Gradle build tool.

The following articles explains how the BGP protocol (used to bridge ISP networks) is completely flawed, and how different protocol implementation can disrupt an entire network.

The following article takes on the cons of today’s Infrastructure as Code (IaC), providing some ideas on how it could get better by learning from other declarative languages.

The following is a comphrensive guide on the little things that make interactions really pleasing for humans, using real examples employed in Apple products.

The following article teaches about WASM, WASI, Web Components and how easy it is to plug a Web Component that runs pre-compiled WASM code in the browser.

The following is a critique on today’s meaning of open-source, how it’s branded, and how it affects the true value it provides, by masking the truth of open-source.

The following is a critique on today’s meaning of open-source, how it’s branded, and how it affects the true value it provides, by masking the truth of open-source.

Today’s read is about devices dimensions, sizes, viewports, pixels, you name it.

The following articles discusses the pattern that humans stick to keywords and phrases that they read the first time they discover something new.

The following article describes paralell how it can be used to parallelize tasks in shell scripts.

The following articles provides some insights on how LLaMA.cpp was achieved and describes the features it provides, since it doesn’t require a GPU to run it.

The following article discusses the failing points and gives advices when rolling your own cryptography usage.

The following articles describes the value of RSS and why it shouldn’t be thought as an old technology, and thus being deprecated.

The following article is a writeup how a team ended up with responses of 20 seconds and being able to shorten it to 60 milliseconds.

The following is a list of use cases where author applies LLMs.

The following is a guide on how tools and websites that provide users a way to download YouTube videos manage to bypass Google’s throttling mechanisms, deployed to prevent downloading by 3rd party tools.

The following is a description of the new cellular connectivity features that are rolling in Android 14.