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Simón Marín.aka DonSi — software engineer

I build backend systems, ML infrastructure and developer tools. Currently crafting internal tools for the Logistics team at Bold. Previously at MercadoLibre, Solcept and SIATA.

Medellín, Colombia

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Simón Marín in the mountains near a lake

somewhere in the Andes ⛰

01 · what i do

Backend Development

Designing scalable, maintainable APIs and systems with Go, Python and Node.js.

MLOps & ML Infrastructure

Taking ML models from notebooks to production with CI/CD, monitoring and automation.

Developer Tools

Crafting CLIs, libraries and internal tools that cut friction out of engineering workflows.

02 · experience

  1. Software Engineer · Bold

    Now

    Medellín, Colombia

    Internal tools for the Logistics team at Colombia's payments platform.

  2. Software Engineer · MercadoLibre

    Previously

    Medellín, Colombia

    Credits MLOps team — deploying machine learning models to production and building the tooling around them.

  3. Embedded Software Engineer · Intern · Solcept

    2022

    Zürich, Switzerland

    Built a proof-of-concept demonstrator for a functional-safety framework — redundant, self-monitoring, failure-injected.

  4. Software Developer · SIATA

    Previously

    Medellín, Colombia

    Medellín and Valle de Aburrá's early-warning environmental monitoring system.

Beyond work, I mentor final-semester Computer Science students at Universidad EAFIT through their internships — the same place where I spent two years as a Teaching Assistant for Data Structures & Algorithms. I wrote about it →

03 · writing

all posts

Mentoring Computer Science Students

Reflections on mentoring CS students at Universidad EAFIT through their internship semester, and sharing my journey with new generations.

2 min read

Safety Framework 🇨🇭

Internship Project 2022 - Switzerland

4 min read