leites.dev

Ezequiel Leites

I'm a software engineer. For over ten years I've been building products end to end, from the database schema to the app in the stores.

Right now I'm a Staff Engineer on the passenger apps of NMBS-SNCB, the Belgian national railway, CTO of Daruma Cloud, and the founder of Matezitos, the consultancy I work with clients through.

If you have a product that needs a technical hand, whether that's getting it started, cleaning it up, or migrating it without stopping the business, get in touch.

ezequiel@leites.dev

Career

2015 – now
From Company Role Until
2021 NMBS-SNCB Staff Engineer Now
2021 Daruma Cloud CTO & co-founder Now
2025 Matezitos Founder Now
2020 Holded Mobile Tech Lead 2021
2019 CookUnity Full stack & React Native 2022
2019 Veepee Senior front end 2020
2016 Extendeal Front-end lead 2019
2015 DMFusion Full stack 2016

What I'm doing now

  • NMBS-SNCB · Staff Engineer

    The apps the whole of Belgium uses to plan train journeys and buy tickets. I look after accessibility, third-party integrations (such as Brupass ticketing, built end to end in the GraphQL BFF) and mentoring developers in a team spread across several vendors.

    React Native · TypeScript · GraphQL

  • Daruma Cloud · CTO & co-founder

    Point of sale and electronic invoicing for businesses in Argentina, used by 60 businesses across 100 stores. I own the architecture, the infrastructure and a good part of the code, including an in-house SDK for invoicing with AFIP/ARCA, the Argentine tax authority.

    Node · Apollo GraphQL · Prisma · MariaDB · BullMQ

  • Matezitos · Founder

    A small consultancy based in Barcelona. We work with companies over the long term: MediCloud360 (home healthcare), Maderpak (packaging, a client since 2016, whose ERP we rewrote from Laravel to Node) and Mas1 (bookings).

What I can help with

  • Mobile apps with React Native and Expo, from architecture to store release.
  • TypeScript backends: Node, GraphQL, Prisma, MySQL and Redis-backed queues.
  • Migrating legacy systems (PHP to Node, many repositories into one monorepo) without stopping day-to-day operations.
  • Accessibility and integrations in apps a lot of people rely on.
  • Technical direction and mentoring.

About this site

This page was written and designed by an AI (Claude), working from my CV and a few instructions of mine. I've reviewed it and everything on it is true, but I didn't put it together by hand.

I'd rather spend that time on my clients' projects. I use the same tools in my day-to-day work, with the same rule: the AI proposes, and I review every change.

Contact

Email
ezequiel@leites.dev
LinkedIn
in/leitesezequiel
GitHub
leiteszeke