deV633
This site: a static Astro publication where the Git repository is the CMS and every note is a Markdown file.
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Roberto Viray II • Software Developer
I build software and document what I learn.
deV633 is where I share development learnings, experiments, projects, architecture decisions, and lessons from building real software.
A decade of coding and learning, kept in the open rather than in my head.
@Component
public class TelemetryBridge {
private final MeterRegistry meter;
@EventListener
public void onEvent(IngestEvent ev) {
meter.counter("sys.events")
.increment();
}
}sys.kernel :: readyUTF-8 • JVM 21
Currently Exploring
- System Design
- Cloud Architecture
- Cybersecurity
- IoT
- Spring Boot 3
- Distributed Systems
Latest Learnings
View all learningsGetting Started with Spring Boot
The minimum you need to understand about auto-configuration, starters, and the application context before writing a real service.
Spring BootJava
How Dependency Injection Works in Spring
Beans, the application context, and why constructor injection is the only form worth defaulting to.
Spring BootJavaArchitecture
Why I Prefer PostgreSQL for Most Applications
One engine that handles relational data, JSON documents, full text search, and queues well enough to postpone every other datastore.
PostgreSQLDatabaseArchitecture
Things I've Built
Explore all projectsExperiment#002
TelemetryPulse
Starter entry. A lightweight metrics agent that scrapes container runtimes and exposes an aggregated view.
Spring BootPostgreSQLDockerVue 3
Experiment#003
ByteVault Auth
Starter entry. A self-hosted authentication layer built around Keycloak, with WebAuthn passkeys and role-based access.
JavaKeycloakPostgreSQLSupabase
Technology I Work With
Backend Systems01
JavaSpring BootC#.NET CoreKotlin
Frontend Engineering02
Vue 3TypeScriptAstroVite
Data Architecture03
PostgreSQLSQL ServerSupabaseRedis
Mobile Platforms04
FlutterDartTauri
Infrastructure & DevOps05
DockerKeycloakNginxCloudflareLinuxGitHub Actions
Open source enthusiast.
You can read the raw source and experiments directly on GitHub.