Node.js isn't just "JavaScript on the server." It's a paradigm shift in how we handle I/O. Thirty years in tech taught me to recognize when something genuinely moves the ground beneath your feet.
Jul 08 2026 · 5′ · Experiments · javascript · node.js
Actuator isn't the problem. Enabling it without a clear exposure policy is. A practical guide to using it as an operational tool without turning it into unnecessary public attack surface.
Jun 17 2026 · 8′ · Tutorials · devops · backend
Kubernetes technical interviews have a problem nobody names: they ask about objects you'll never touch in production, while ignoring the mistakes that actually break real systems. Here's the map I was missing.
Jun 16 2026 · 9′ · Tutorials · docker · devops
Prisma 6 improves ergonomics and performance, but there are three behavior changes that won't scream at you in the compiler — and will absolutely show up at runtime if you don't audit your relational queries first. Practical guide with checklist.
Jun 03 2026 · 8′ · Tutorials · TypeScript · backend
strict: true is not enough — and it's not the whole story. A flag-by-flag breakdown of what each strict mode option actually does, what bugs it prevents, and the order to enable them in an existing codebase.
May 31 2026 · 8′ · Tutorials · TypeScript · backend
Auth tutorials show you the happy path. The real problems in digital identity show up in revocation, state-change propagation, and the trust model. A decision guide from the inside.
May 30 2026 · 9′ · Tutorials · backend · seguridad
Same backend, same database, same k6. In the first runs it looked like Embedded GlassFish was on top. When I fixed JDK, warmup, window, heap, and DB attribution, the story changed: Spring Boot ended up with the best local profile for this workload. Payara Micro was the cleanest Jakarta EE by check failures. GlassFish surprised by being viable.
May 28 2026 · 10′ · Experiments · Performance · backend
Prisma query logs help you catch patterns, but if the problem lives inside PostgreSQL, the ORM won't show it to you. Here I break down when Prisma logging is enough and when you need to instrument the database directly.
May 25 2026 · 7′ · Tutorials · TypeScript · backend
OpenTelemetry doesn't improve performance. It improves diagnostic quality when a slow request mixes DB, downstream, N+1, and partial errors. This reproducible lab shows which signals stay hidden when you only have logs, and what appears when you look at the trace.
May 16 2026 · 5′ · Experiments · Experimentos · backend
Architecture, real systems, product decisions and technical lessons. Everything reviewed with my own judgment before it ships.
213 articles published