geraldo mazzinirésumé
pt
  1. replacing beehiiv

    @thenews.cc · 2025 — now

    the news sent its newsletters through beehiiv, which is built for creators. the html came out heavy and full of repeated code, and some editions got too close to the point where gmail clips the e-mail. so we built our own sending infrastructure. some of our sections already go out 100% through it.

    1. 1every line of html in the e-mail is ours
    2. 2blocks that change depending on who’s reading
    3. 3lighter e-mails, with room for more text before gmail clips them
    4. 4every piece of data stored in more than one place
    5. 5an editor made for a news newsletter

  2. tns group login

    @thenews.cc

    the authentication every product in the tns group runs on. one place to sign in instead of a login per product.

  3. the news deliverability

    @thenews.cc

    everything that gets the newsletter into the inbox instead of spam.

  4. ~R$6M valuation

    not journal

    @notjournal.ai · 2024 · founding team

    it started as ai reading financial news, classifying it and pulling out signals for market professionals. guilherme benchimol, founder of xp inc., was among the users. when i left for the news, the company was valued at around R$6M. today it’s an independent journalism platform with ai curation.

  5. before garena’s official league

    liga brasileira de free fire

    at 16

    a marketplace for amateur tournaments that became the biggest amateur competition of its time, with teams like loud, los grandes and b4. the name was ours before garena used it for its own official league. my first real taste of scale.

  6. 15k users in 1 week

    darkface inc.

    at 15 · php

    my first social network, built in php with a friend. i made the product calls: what went in, what stayed out and in what order. it hit 15,000 users in its first week.

  7. the first one

    building block game

    at 12 · python · blender game engine

    my first project: a python game, made in the blender game engine, where you could build whatever you wanted out of loose pieces. only later did i find out lego itself had already released a game with the same idea.

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