ai23 mar 2026Building AI Agents That Actually Work: Architecture, Patterns, and Hard Lessons from ProductionThe engineering reality behind AI agents in 2026. Tool orchestration, memory systems, planning loops, guardrails, cost control, and the architecture patterns that separate demo agents from production agents.llmarchitecturetypescriptbackendblog.readMore Building AI Agents That Actually Work: Architecture, Patterns, and Hard Lessons from Production
debugging23 mar 2026The Art of Debugging: How Senior Engineers Find Bugs 10x FasterSystematic debugging from first principles. Scientific method, memory leaks, race conditions, production debugging, war stories, and the mental models that separate juniors who flail from seniors who fix.typescriptnode.jsperformancebackendblog.readMore The Art of Debugging: How Senior Engineers Find Bugs 10x Faster
infrastructure23 mar 2026Scaling to One Million Users: The Infrastructure Playbook Nobody SharesThe definitive guide to scaling a web application from 0 to 1M+ users. Connection pooling, caching layers, load balancing, background jobs, edge computing, monitoring, and the real war stories that nobody puts in their blog posts.scalingbackendpostgresqldevopsblog.readMore Scaling to One Million Users: The Infrastructure Playbook Nobody Shares
api22 mar 2026API Versioning Strategies: The Hard Lessons from Running APIs in Production for 8 YearsURL versioning, header versioning, date-based versioning, deprecation policies, schema evolution, and the migration playbook. What actually works when you have real consumers depending on your API.restversioningbackendarchitectureblog.readMore API Versioning Strategies: The Hard Lessons from Running APIs in Production for 8 Years
linux22 mar 2026Linux Internals Every Developer Should Know: Processes, Memory, Networking, and the KernelA deep dive into the Linux internals that matter for application developers: process lifecycle, memory management, networking stack, cgroups, eBPF, and the debugging tools that will save you at 3 AM.devopssystems-programmingnetworkingbackendblog.readMore Linux Internals Every Developer Should Know: Processes, Memory, Networking, and the Kernel
oauth22 mar 2026OAuth 2.1 and OpenID Connect: The Parts That Actually Confuse EveryoneA no-nonsense deep dive into OAuth 2.1 and OpenID Connect. Authorization Code + PKCE with real HTTP requests, token storage wars, refresh token rotation, OIDC discovery, multi-tenant identity, and the vulnerabilities that bite even experienced teams.authenticationsecurityopenid-connectbackendblog.readMore OAuth 2.1 and OpenID Connect: The Parts That Actually Confuse Everyone
system-design22 mar 2026System Design Interview: The Patterns Nobody Teaches YouThe thinking frameworks, back-of-the-envelope math, and architecture patterns that actually matter in system design interviews — from someone who has been on both sides of the table.architecturedistributed-systemsinterviewsbackendblog.readMore System Design Interview: The Patterns Nobody Teaches You
database22 mar 2026Database Migrations That Won't Destroy Your Weekend: Zero-Downtime Schema ChangesThe hard-won lessons from years of migrating production databases without downtime. Lock contention, expand-contract patterns, online schema tools, ORM pitfalls, and the incident stories nobody talks about.postgresqlmigrationsdevopsbackendblog.readMore Database Migrations That Won't Destroy Your Weekend: Zero-Downtime Schema Changes
autenticación4 mar 2026Autenticación Moderna en 2026: JWT, Sesiones, OAuth y PasskeysEl panorama completo de autenticación: cuándo usar sesiones vs JWT, flujos OAuth 2.0/OIDC, rotación de refresh tokens, passkeys (WebAuthn) y los patrones de autenticación en Next.js que realmente uso.seguridadnext.jsdesarrollo-webbackendblog.readMore Autenticación Moderna en 2026: JWT, Sesiones, OAuth y Passkeys
node.js11 feb 2026Observabilidad en Node.js: Logs, Métricas y Trazas sin ComplejidadLogging estructurado con Pino, métricas con Prometheus, trazas distribuidas con OpenTelemetry. El stack de observabilidad que uso para apps Node.js en producción, de cero a visibilidad total.observabilitydevopsmonitoringbackendblog.readMore Observabilidad en Node.js: Logs, Métricas y Trazas sin Complejidad
sql5 feb 2026SQL Window Functions: The Feature That Changed How I Write Every QueryWindow functions are the single most underused SQL feature. Running totals, rankings, moving averages, gap analysis, and session detection — all without subqueries. Real examples from production databases.postgresqldatabaseperformancebackendblog.readMore SQL Window Functions: The Feature That Changed How I Write Every Query
graphql15 ene 2026GraphQL vs REST: After Using Both in Production, Here's What I Actually ThinkNot another 'GraphQL is better' or 'REST is simpler' post. Real production experience with both, including the parts that GraphQL evangelists won't tell you and the REST limitations that actually matter.restapi-designarchitecturebackendblog.readMore GraphQL vs REST: After Using Both in Production, Here's What I Actually Think
security4 dic 2025Mejores Prácticas de Seguridad en APIs: La Lista de Verificación que Ejecuto en Cada ProyectoAutenticación, autorización, validación de entradas, limitación de velocidad, CORS, gestión de secretos y el OWASP API Top 10. Lo que reviso antes de cada despliegue a producción.apibackendnode.jsweb-developmentblog.readMore Mejores Prácticas de Seguridad en APIs: La Lista de Verificación que Ejecuto en Cada Proyecto
postgresql13 oct 2025Optimización de consultas en PostgreSQL: De lento a sub-milisegundoLas técnicas de optimización de PostgreSQL que uso en bases de datos en producción. EXPLAIN ANALYZE, estrategias de índices, reescritura de consultas y los cambios exactos que redujeron los tiempos de consulta de segundos a microsegundos.databaseperformancebackendblog.readMore Optimización de consultas en PostgreSQL: De lento a sub-milisegundo
redis29 sept 2025Estrategias de caché con Redis que realmente funcionan en producciónCache-aside, write-through, prevención de cache stampede, estrategias de TTL y patrones de invalidación. Los patrones de Redis que he usado en apps Node.js en producción con ejemplos de código reales.cachingbackendnode.jsperformanceblog.readMore Estrategias de caché con Redis que realmente funcionan en producción
database16 sept 2025Diseño de esquemas de base de datos: Patrones que envejecen bienReglas de normalización, convenciones de nombres, soft deletes, audit trails, patrones multi-tenancy, estrategias de versionado y las decisiones de esquema de las que me he arrepentido. Enfocado en PostgreSQL.postgresqlarchitecturebackendsqlblog.readMore Diseño de esquemas de base de datos: Patrones que envejecen bien