Projects
Backend case studies: the problem, the architecture decisions and what each build taught me.
Index 04 case studies 06 practice builds 2024 — 2026
Microservices system for managing a health clinic — patients, appointments, admissions and billing with JWT auth, automatic migrations and an AI medical assistant.
Simulator of Cboe's BOE binary protocol with a matching engine, trading bots, REST API, WebSocket feed, and dashboard — all packaged in a single deployable JAR.
Android app to wake and shut down devices on the network — Magic Packet (WOL), remote shutdown via SSH, ICMP ping monitoring, push notifications and a home screen widget.
REST API for users with two-phase registration, stateless JWT authentication, PENDING → ACTIVE state transition via one-time token and integration tests.
Practice projects, Alura Latam challenges and study material.
14-chapter hands-on guide to prepare for the Oracle Certified Professional Java 21 exam.
Personal LeetCode solutions in Java, organized by problem with execution examples.
Java CLI that searches books via the Gutendex API and persists authors in PostgreSQL.
Console currency converter that fetches live exchange rates from ExchangeRate-API.
Playable Arkanoid clone built with HTML5 Canvas and vanilla JavaScript — no frameworks.
Web app that encrypts and decrypts messages using vowel substitution. Alura challenge.