tchez.dev

Marco Netto

Tech Lead • Full-Stack & AI Engineer

Building AI solutions for real problems. Leading teams and projects. Sharing what I learn through articles and my community.

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A little about me

I’m a Computer Science graduate with five years in software, the last three focused on building agentic workflows and AI solutions. I’ve learned in practice that not every problem labeled AI actually needs it. I shape the solution around what each case really demands: cost, reliability and who will maintain it after me. Sometimes that’s an agentic workflow, sometimes a simpler model, sometimes conventional automation.

Today I’m tech lead of the AI squad at an airline’s innovation lab. For each problem the business brings, I write the technical plan: how the process works today, where it could go, and a staged path to get there, with quick wins and proofs of concept. Then I give the projects technical support and build part of the solutions myself.

Outside work I founded SpeakUp Community, a free English conversation community that has been growing fast.

  • music
  • sports
  • math
  • philosophy
  • photography
  • travel
  • Projects
  • Skills and topics
  • Papers and talks
  • Interests

Top personal projects

  • A free English conversation community I founded.

  • My articles on AI and software.

  • A scorekeeping PWA for my family’s games.

  • Eight months studying and working in Dublin to improve my English.

  • A mental health chatbot from my award-winning thesis.

A free English conversation community I founded in January 2025 in Palmas, Brazil, and still lead. It started as a group of friends looking for a safe place to practice, and today it has 1,000+ followers on Instagram.

It has run 20+ meetups, in person and online, with peaks of 70+ participants at once, and an edition in Dublin, its first outside Brazil. It was featured in a TV report and partners with Brazil’s largest network of language schools, Wizard by Pearson.

I also built its site, speakup.tchez.dev, with Astro and TypeScript.

  • Community
  • English
  • Astro
Visit the siteInstagramTV reportLinkedIn

My blog, with articles, tutorials and reflections on AI and software.

It is where I write about some of my projects, what I have been studying lately, and tutorials.

  • AI
  • Writing
Read the blog

A scorekeeper for some of the games my family loves (canastra, truco and others).

It is an offline-first PWA, a web app that works without an internet connection. There is no backend, so the scores are saved on the device that recorded them.

I built it with Spec-Driven Development: I wrote each SPEC with its rules and acceptance criteria, and an AI implemented it.

  • PWA
  • Offline-first
  • TypeScript
Open appLinkedIn post

I took a career break to spend eight months immersed in English at a school in Dublin.

Those months were intense, and I reached my goal: fluent English.

  • English
  • C1
  • Communication
LinkedIn post

A chatbot specialized in mental health, built on my own RAG architecture when the technique was still recent.

It was my final-year Computer Science thesis (graded 10 out of 10) and became two papers, one at the 26th ENCOINFO and one at the XXIV Jornada de Iniciação Científica. The Jornada paper won the Young Researcher Award (1st place).

  • AI
  • RAG
LinkedIn postPaperSource code

Featured research and talks

Papers

  • Development of an Informative Mental Health Chatbot Using the RAG Architecture

    My thesis (the mental health chatbot), published at the 26th ENCOINFO and the XXIV Jornada de Iniciação Científica, 2024. Young Researcher Award, 1st place.

    PaperAward

  • APILyzer: a Python library for assessing the security and maturity of REST APIs

    25th ENCOINFO, 2023, presented at the event. The library is discontinued: its goal was the paper.

    PaperSource code

  • OSLive: an ANTLR compiler that draws process trees

    XXIII Jornada de Iniciação Científica, 2023.

    Paper

  • A Big Data Analysis with Apache Spark: Illiteracy among Brazilian Voters

    26th ENCOINFO, 2024.

    Paper

Talks and courses

  • Specializing LLMs with Knowledge Storage: a hands-on short course

    Co-taught at the 26th ENCOINFO, 2024.

    LinkedIn post

  • AI Agent Architecture: from Concept to Practice

    Computing seminar series, 2025.

    LinkedIn post

  • Unlocking the Potential of AI in Software Development

    Given at an internal AI week at work, 2024. Recognized as talk of the month.

    LinkedIn post

  • Seminars, talks and short courses

    Others I’ve given over the years: technical talks on RAG, vector databases, compilers with ANTLR and open source; short courses on Python, Prolog and Unity; and some for people outside tech, such as a workshop for Social Research classes on the responsible use of AI in scientific research.

Awards and volunteering

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Under the hood

This assistant is a list of rules.

9 rules0 models

#If the message…Then
01asks if this is an AI, a bot or a modelare youyou are+aiiareveal how it works
02mentions projects or what he builtprojectbuiltbuildmadeshow project cards
03mentions hiring, contact or talkinghirehiringcontacttalkpoint to LinkedIn
04mentions studying, the blog or articlesstudylearnblogarticlelink the blog
05mentions SpeakUp, English or communityspeakupenglishcommunityinglestell about SpeakUp
06asks who Marco iswhomarcoabouttchezintroduce Marco
07says hihihelloheyoisay hi back
08says thanksthankthankscheersobrigadsay you are welcome
09anything elsepoint to the questions and LinkedIn
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