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Kevin Defalco.Software Developer.

Passionate about software. I build web systems and bespoke tools.

Buenos Aires, Argentina
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Claude Code sends more than you use. Here's how to trim it

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What I've built, and for whom

Now

Developer at OM Express.

Internal ERP for the logistics of a private postal carrier: daily operations, real-time treasury and an AI assistant that answers from the company manuals.

OM Express

Developer · 2024 — Present

Read the case studyVisit site

  1. Digitized daily operations

    End-to-end logistics management runs through a single system, designed from scratch for the carrier's real workflows.

  2. Real-time treasury

    Instant view of the company's balances, movements and billing, with no waiting for reports or cross-checking spreadsheets.

  3. Electronic invoicing with ARCA

    Invoices are issued from the system itself using Facturas SDK (facturas-sdk.dev), straight against ARCA with no middleman and protection against duplicates on retries.

  4. Internal AI assistant

    Answers the team's questions from the company manuals and shows which section each answer comes from.

Projects

Things I've built.

Systems, catalogs and tools in production, for clients and for my own use.

Tomás Autos

The catalogue of a multi-brand car dealership, with a shareable page of its own for every vehicle.

  • Astro
  • TypeScript
  • Sharp
  • Satori
Live

El Cauquén Artesanías

The catalogue of a woodcraft workshop, with photos, dimensions and price for every piece.

  • Astro
  • JavaScript
  • Vercel
Live

Pan Cultura

The website of an artisan bakery, with a product catalogue and WhatsApp ordering.

  • Astro
  • TypeScript
  • SVG
  • Vercel
Live

Anotador para juegos

PWA

Real-time scorekeeping for board and card games, with a mobile-first interface.

  • React
  • TypeScript
  • Tailwind CSS
LiveCode

El Legionario

In development

Turn-based online tennis manager: each person runs a fictional player on a circuit modeled on the pro tour, and a custom engine plays out every match point by point.

  • JavaScript
  • Node.js
  • Canvas

Tu Turno Padel

A centralized platform for booking padel courts. Passwordless auth and booking (via WhatsApp) plus a weekly admin dashboard designed for court owners to manage schedules and reservations.

  • Next.js 16
  • TypeScript
  • Drizzle ORM
  • Kapso
Live

Prode Mundial

Football predictions in private groups, with an automated leaderboard.

  • Next.js 16
  • React 19
  • TypeScript
  • Drizzle ORM
  • PostgreSQL
  • Tailwind v4
  • Vitest
Live

Demo

Blog

Latest writing.

Notes on development, tools and things I find useful day to day.

Claude CodeAITutorial

Claude Code sends more than you use. Here's how to trim it

Every message you send, Claude Code also ships tool definitions, skills and instructions for features you may never touch. A few lines in settings.json clear out the extras and free up context on every turn.

5 min read

PrivacyChromeTutorial

Chrome remembers too much. Here's how to make it forget (except what you choose)

Every site you visit leaves something behind in your browser, and a good chunk of it exists to follow you around. With a 3-minute tweak, Chrome wipes it on close and keeps you signed in wherever you choose.

3 min read

All articles

Tools

How I work with AI agents

What I use every day to work with agents, from planning to review.

  • herdr

    Terminal multiplexer to run several agents in parallel and see what each one is doing.

  • Claude Code

    Anthropic's coding agent, which I use to plan, implement and review.

  • Codex

    OpenAI's coding agent, which I switch to depending on the task.

  • mattpocock/skills

    Engineering skills. When the work calls for it, I follow their workflow: plan, spec, split into tickets, implement and review. aihero.dev

  • retro

    A mattpocock skill to run a retrospective on a coding session and improve the agent's environment for the next ones.

  • emilkowalski/skills

    Design and interaction judgment for animation and UI polish.

  • Libraries.dev

    UI effects for AI interfaces, with a skill to apply them well.

  • skills.sh

    Where I search for and discover new skills.

  • Gemini API

    Image and PDF reading (OCR) to turn documents into structured data.

  • OpenAI + AI SDK

    Interactive agents with streaming, like OM Express's internal assistant.

  • Codex Bell

    Plays a sound when Codex finishes a task or needs an answer. PyPI

Education

Where I come from.

  • 2023 — 2025

    Higher Technician in Software Development

    Istea

  • 2016 — 2021

    Law

    University of Buenos Aires

Contact

Got a project?Let's talk.

Tell me what you want to build and I'll get back to you with a concrete idea of how to approach it.

Send an email
kevin@buenos-aires

$ mail kevindefalco@gmail.com

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