Engineering

How I rebuilt ezequielcarrizo.com as a static Next.js 16 site with no client JavaScript, no backend and no analytics, and what it took to reach 100 on every Lighthouse category on mobile.

The architecture behind Fabiana, my AI assistant that answers customers on WhatsApp, email, chat and the phone: an SQS pipeline on Lambda, one structured LLM call per message, and no fixed costs.

How WardenAuth, my authorization API, decides every access check: scopes that inherit, deny-wins policies, an answer that explains itself, and AI agents capped by the user they act for.

How I structured a production monorepo with SST v3: infrastructure-as-code, PR previews, multi-environment deployment, and cost optimization.

How I wrote and structured 101 interview tip guides for SEO: keyword research, content hierarchy, internationalization, and reaching page one.

The architecture behind Interview Sparring: how AI-powered mock interviews work, from real-time speech analysis to adaptive scoring and feedback.

Applying Domain-Driven Design principles to serverless Lambda functions: bounded contexts, repository pattern, and dependency injection with tsyringe.

How I set up transactional email with Amazon SES from Lambda functions: domain verification, bounce handling, and staying out of the spam folder.

The design decisions behind a production-ready React component library: composability, accessibility, and why I built it from scratch.

Real lessons from two years as Technical Software Lead: stakeholder management, risk mitigation, and building high-trust engineering cultures.

The transition from individual contributor to tech lead is harder than it looks. Here is what I learned making that shift at The Knot Worldwide.

Reflecting on a year of growth: from earning my AWS certification to completing a car restoration and rebuilding this very blog.

A critical look at dependency bloat in modern JavaScript projects and strategies to keep your bundle lean without sacrificing productivity.

Practical TypeScript patterns that changed how I write code: template literal types, type guards, satisfies, and const assertions.

A deep dive into the architecture of my personal site: static export, sitemaps, metadata, and why I chose serverless over a CMS.

The concrete steps I took to hit 100 on all four Lighthouse categories: Performance, Accessibility, Best Practices, and SEO on a Next.js static site.