Matheus Oliveira

SNES-style pixel art scene featuring Linus Torvalds facing a giant monster shaped like a GPU representing big tech companies, with the caption 'LINUS: Open Source Atack!'

Why Every Developer Should Use Linux

Top reasons why developers choose Linux: native tools, performance, security, and parity with production environments.

SNES 16-bit pixel art of a shield protecting a database from corrupted data blocks

Stop Writing Manual Validations: The Definitive Guide to Bean Validation and DTOs in Quarkus

Ditch the infinite ‘if-else’ blocks! Learn how to ensure data integrity across all layers using Bean Validation 3.1. A complete guide on DTOs, custom rules, method validation, and standalone usage.

Super Java Bros: How the Garbage Collector Clears the Stage in Java 25 (The Ultimate Guide)

It’s MAR 10 Day! In Java 25 (LTS), the Garbage Collector has become an elite speedrunner. Understand the engineering behind Generational ZGC, Compact Object Headers, and how to tune your JVM for maximum performance.

A 16-bit pixel art scene inspired by Street Fighter II on SNES. A fighting stage set in a futuristic server room. A young 'Junior Dev' character in a fighting stance facing a huge robot boss labeled 'SENIOR REQUIREMENTS'.

Guide to the First IT Opportunity and How to Develop Your Career

Looking for the ‘keyboard shortcut’ to enter or level up in IT? Check out real tips on networking, open source, and personal marketing to accelerate your career.

SNES 16-bit pixel art battle screen between a tech-fantasy hero and a 'Legacy Complexity' monster

RESTful APIs with Quarkus: Use Jakarta REST and Quarkus REST for Spring Developers

A complete guide for Spring developers on RESTful APIs in Quarkus. Learn about the Jakarta REST specification, the Quarkus REST implementation, and how to build high-performance endpoints.

OCI Object Storage and PARs Illustration

OCI Object Storage: Configure file upload with Quarkus on Always Free

Learn how to configure your Quarkus application to use OCI Object Storage. Leverage Always Free’s 20GB storage and 10TB bandwidth to scale your media with PARs.

Zero Trust in Practice: Protecting Secrets with OCI Vault and Quarkus

Upgrade your security to Zero Trust. Learn how to use OCI Vault and Hardware Security Modules (HSM) to protect your Quarkus application’s database secrets.

SQL or NoSQL? Why Not Both? Using Oracle's Converged Database with Quarkus

Discover the power of Oracle’s converged database: how to persist and query native JSON documents using Quarkus and Hibernate Panache without needing a separate NoSQL database.

Ink-wash manga style illustration featuring a stone monolith shaped like a cylindrical database, with a glowing golden digital aura representing mTLS connection.

Quarkus + Oracle Autonomous DB: Building a Secure mTLS Connection

Learn how to connect Quarkus to Oracle Autonomous Database using mTLS Wallet authentication in OCI’s Always Free tier.

Oracle Cloud Free Tier: How to Get 24GB RAM and Database Free Forever

A step-by-step guide to creating your Oracle Cloud Free Tier account and securing 24GB of RAM and free databases forever.