Juanchi.dev
Digital Native · real systems
·
HomeCVBlogLabContact
Skip to content
Juanchi.dev
Digital Native · real systems
·
HomeCVBlogLabContact

Tag: nodejs

13
Jul 08 2026

Node.js: the runtime that changed how we think about backend

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

5′
Jun 09 2026

Web Crypto API in the browser vs Node.js: the differences that will burn you

Web Crypto API looks like one thing — until you try to reuse the same encryption code across browser, Node.js, and Next.js edge runtime. The differences are subtle, they're documented, and almost nobody reads the docs until something blows up.

Jun 09 2026 · 8′ · Tutorials · TypeScript · node.js

8′
May 28 2026

Docker healthchecks: what they actually measure and what you shouldn't promise

A healthcheck that only says "the process is responding" can hide serious business-level failures. Let's break down what the HEALTHCHECK instruction actually promises, where the standard recipe falls apart, and how to use it as the limited operational signal it really is — not as a guarantee of heal

May 28 2026 · 8′ · Tutorials · node.js · docker

8′
May 16 2026

Prisma vs JDBC: the benchmark that almost made me blame the wrong ORM

I built a reproducible lab to compare Prisma 5 against Spring Boot JdbcTemplate on the same PostgreSQL 16. What I found wasn't a winner: it was that query shape and N+1 explain almost everything, and blaming the ORM is too easy.

May 16 2026 · 5′ · Experiments · TypeScript · Performance

5′
May 12 2026

pnpm workspaces: the CI cache that survived the fix and cost me 40 minutes per build

The CI was green. The cache wasn't working. Forty minutes per build run because pnpm couldn't find the store in GitHub Actions. Here are the logs, the before/after YAML, and the exact configuration that brought it down to 8 minutes.

May 12 2026 · 8′ · Experiments · TypeScript · pnpm

8′
May 09 2026

Themis vs Web Crypto API: TypeScript Encryption Tradeoffs That Are Not Obvious

Comparing Themis with Web Crypto API is not academic: it changes bundle size, threat model, key rotation, and where each responsibility should live. The tradeoffs are less obvious than they look.

May 09 2026 · 9′ · Experiments · TypeScript · node.js

9′
May 08 2026

Supply chain npm vs PyPI: I compared both simulations and the most dangerous vector isn't what everyone thinks

I ran supply chain attack simulations on npm and PyPI separately. When I put them side by side, the pattern that emerged made me uncomfortable: the ecosystem everyone watches isn't the most vulnerable one. Here's the cross-meta-analysis with real numbers.

May 08 2026 · 9′ · Experiments · npm · node.js

9′
May 06 2026

Docker Compose in Production in 2026: I Ran My Real Stack for 30 Days and Here Are the Numbers

A HN thread with 398 points blew up the debate again: is Docker Compose in production legitimate or an antipattern? I ran my real stack on Railway for 30 days and brought actual numbers. Spoiler: it's not embarrassing if you know exactly what it costs you.

May 06 2026 · 8′ · Experiments · node.js · docker

8′
May 05 2026

Bun Migrates from Zig to Rust: What My Real Benchmarks Say About Whether It Matters

489 + 506 points on HN. Bun ports to Rust and everyone has a take. I ran the benchmarks on my real stack before opening my mouth. The uncomfortable result: the underlying language matters less than the hype suggests.

May 05 2026 · 8′ · Experiments · TypeScript · Performance

8′

Series

  • Open Data and Creativity2
  • Awesome Curated: The Tools10
  • Awesome Curated1
See all

Clusters

  • Software architecture

Categories

  • Experiments98
  • Tutorials67
  • Opinion42
  • Reflections18
  • Technology8
  • History6

Tags

  • #TypeScript
  • #arquitectura
  • #nextjs
  • #railway
  • #java
  • #LLM
  • #postgresql
  • #ia
  • #prisma
  • #software-architecture
  • #firma-digital
  • #AI

Popular

  1. 01pnpm vs npm vs yarn vs bun: The Real Comparison Nobody Gives You in 2025
  2. 02Next.js App Router: The Guide I Wish I Had When I Migrated from Pages Router
  3. 03TypeScript: The Patterns I Actually Use Every Single Day
  4. 04Docker for Node.js Developers: From Zero to Production Without Losing Your Mind
  5. 05Your Digital Signing Cryptography Has an Expiration Date: What NIST Published and How to Migrate Your HSM

Newsletter

One email a week. What I'm learning, building, and breaking.

All
Experiments
Tutorials
Opinion
Reflections
Technology
History

Juanchi.dev is Juan Torchia’s public notebook — architecture, real systems and product decisions. Written and reviewed by hand in Buenos Aires. Built with Next.js, Prisma and PostgreSQL; deployed on Railway. No third-party trackers beyond aggregate analytics.

GitHubRSS© 2026 Juan Torchia · All rights reserved.

Real code. Unfiltered takes.

Architecture, real systems, product decisions and technical lessons. Everything reviewed with my own judgment before it ships.

213 articles published

Series

  • Open Data and Creativity2
  • Awesome Curated: The Tools10
  • Awesome Curated1
See all

Clusters

  • Software architecture

Categories

  • Experiments98
  • Tutorials67
  • Opinion42
  • Reflections18
  • Technology8
  • History6

Tags

  • #TypeScript
  • #arquitectura
  • #nextjs
  • #railway
  • #java
  • #LLM
  • #postgresql
  • #ia
  • #prisma
  • #software-architecture
  • #firma-digital
  • #AI

Popular

  1. 01pnpm vs npm vs yarn vs bun: The Real Comparison Nobody Gives You in 2025
  2. 02Next.js App Router: The Guide I Wish I Had When I Migrated from Pages Router
  3. 03TypeScript: The Patterns I Actually Use Every Single Day
  4. 04Docker for Node.js Developers: From Zero to Production Without Losing Your Mind
  5. 05Your Digital Signing Cryptography Has an Expiration Date: What NIST Published and How to Migrate Your HSM

Newsletter

One email a week. What I'm learning, building, and breaking.

Blog
Uses
Now