All experience

Mercado Libre / Mercado Pago · Oct 2024 — present · Colombia

Software Engineer Current

I build the internal platforms CX, Benefits and Refunds teams use to run operations across Mercado Libre's markets.

  • New Refunds platform that now processes millions of refunds
  • About 15 improvements to the internal library that builds UIs from JSON
  • Nearly 90% of my work is now AI-assisted

Phases

  1. Oct 2024 — 2025

    Internal platforms at OpsIT

    I joined OpsIT, the team that builds the internal control tools CX, Benefits and Refunds teams use across countries. My first year was about learning the company's in-house technologies and design systems, and adding new capabilities to those platforms.

    • About 15 major improvements to an internal library that builds UIs from JSON files, including new, highly customizable components.
    • A pseudo-language inside the JSON to format data (uppercase, dates, currency, text sanitization) and render based on context.
    • React
    • TypeScript
    • JSON

    Projects from this phase

    • Interfaces written in JSON

      About 15 major improvements to an internal library that builds UIs from JSON files, including a pseudo-language to format data straight from the configuration.

      CASE2024 — 2025

  2. 2025

    The new Refunds platform

    In my second year, I built the new platform for the refunds process, working closely with the backend team and the teams that own the APIs. It was complex to build and turned out robust for the teams managing refunds across countries.

    • Creating and configuring refund flows.
    • Handling refunds that can't be processed automatically.
    • Tracking every batch and acting on its execution outcomes.
    • Templates for each payment processor (Visa, Mastercard…).
    • Today it processes millions of refunds efficiently.
    • React
    • TypeScript

    Projects from this phase

    • A platform for millions of refunds

      I built the new platform Refunds teams use to create, configure and track refund flows across countries. Today it processes millions of refunds.

      CASE2025

  3. 2026 — present

    Benefits, automation and AI

    Since launch, I keep adding capabilities to several internal platforms, now on the backend too, with AI as part of every task.

    • New modules for the Benefits platforms, which started as cashback platforms and which we migrated.
    • Go backend verticals for Refunds and n8n workflows.
    • Researching and shipping new features on internal platforms.
    • Over the last six months, nearly 90% of my work has been AI-assisted (Claude, Codex, Figma and v0), in line with the company's push.
    • Go
    • n8n
    • Python

    Projects from this phase

    • Benefits platforms (formerly cashback)

      Frontend for the cashback platforms, with control and management modules integrated with several internal services, and their migration to Benefits, where I keep adding capabilities.

      Internal tool2026 — present

    • Go backend verticals for Refunds

      New Go backend verticals for the refunds domain, along with automated workflows in n8n.

      Internal tool2026 — present

    • AI in everyday development

      About 90% of my work over the past six months relies on AI, along with internal assistants and automated workflows in n8n.

      Internal tool2026 — present

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