title: “Mini Challenge 1 — Topics 1-4” part: 1 topic_number: 0 slug: “mini-challenge-01” difficulty: “Beginner” prerequisites: “create-table, insert, update, delete” — Mini Challenge 1 — CREATE TA...

title: “Database Setup: company_db” part: 0 topic_number: 0 slug: “setup-company-db” difficulty: “Beginner” prerequisites: “none” — Database Setup: company_db What You’re Building Throughout thi...

Linux Quick Reference - Essential Commands Print this or keep handy while learning Navigation pwd # Show current directory cd ~ # Go to home dire...

Setting up a JAX-RS REST API using Jersey, documenting it with Swagger, and the configuration that trips people up.

SQL patterns that come up repeatedly when working with financial data in Oracle — date handling, reconciliation queries, and aggregations that don't lie to you.

Setting up JMeter to load test a Java REST API — the tests I actually run and what I look for in the results.

How to use Maven profiles to build the same application for WildFly 17 in non-production and JBoss 4.1 in production.

What actually goes in Maven settings.xml, and how to use profiles to manage different environments without hardcoding anything.

Lessons from building and maintaining multicurrency payment systems in financial services.

Configuring Apache httpd as a reverse proxy with Kerberos (SPNEGO) SSO and IP whitelisting in front of a Java application.