Open Source

16-bit SNES-style pixel art of an engineer standing at a fork in the road, one path leading to an automated factory conveyor belt and the other to a plaza full of people talking, with a sunrise in the background

How to Stand Out as a Software Engineer in the AI Era

Writing code fast stopped being a differentiator. Here’s what actually sets engineers apart in 2026: from century-old advice by Carnegie and Covey to technical judgment and public visibility.

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Docs and Translation: The Easiest Way to Start Contributing to Open Source

Want to contribute to Open Source but freeze before you even open the editor? Documentation and translation are the easiest door in, and you can ship your first PR today.

Matheus Oliveira talking at an event about his open source journey

I Did It! Top 10 Contributor on Quarkus LangChain4j

An ordinary Monday morning, no stage and no audience, I found out I’d reached 10th place among the contributors to quarkus-langchain4j in the world. The story of how I got there in 5 months, and what changed along the way.

A slip-box of notes wired into an AI agent

Using Zettelkasten with Agents

How structured note-taking with Zettelkasten became the memory layer for my AI agents, and how it saves me tokens, time and money.

Matheus Oliveira on the main stage at TDC Floripa 2026

Face to Face with Claude: I Got Pulled Onto the TDC Main Stage With No Warning

I almost didn’t go. The panel topic changed, my speaking partner couldn’t make it, and I hadn’t budgeted for the trip. Hours after arriving, the founder of the largest tech conference in Latin America called me onto the main stage in front of 200+ people. This is the interview where I explain how.

Minimalist diagram showing a central 'Agent' node connected to four modules: Soul, Memory, Skills and Tools, on a dark purple background

Qlawkus: Build Personal AI Agents in Java with Quarkus

Introducing Qlawkus, a set of Quarkus extensions for building personal AI agents in Java: memory that’s automatically injected, procedural skills, voice-enabled messaging, and composition via agent.yml.

A 16-bit SNES pixel art illustration of a community hub where characters catch bugs in jars, write on scrolls, discuss around a fountain, and donate gold coins.

How to Contribute to Open Source Without Writing Code

Think contributing to Open Source is just about opening PRs? Discover how to help the community through issues, discussions, articles, and donations, even without focusing on code.

Java AI Libraries Compared: LangChain4j, Spring AI, and Quarkus LangChain4j

I built the same AI app with LangChain4j, Spring AI, and Quarkus LangChain4j. One of them took 92 lines. The others took 192 and 180.

Why You Should Be Part of the Quarkus Community

Contributing to open source doesn’t have to be scary. A true story of how interacting with the Quarkus community led to a contribution to a newly launched project in less than 48 hours.

Committer Mission: A Journey into Open Source

How a mentorship session with Luiz Real made me plan to become a Quarkus committer in 12 months.