Márcio Oliveira
Hi, I'm Marcio! I'm a Brazilian Software and Machine Learning Engineer currently conducting full-time explorations on agentic AI and self-learning orchestration through Aya Tecnologia.
Before that, I was a Senior Software Engineer at ReclameAQUI handling 21M monthly active users, where I also work as a ML Engineer and built an audit system with 92% accuracy.
I’m usually tinkering with projects across AI, game development, and technical education. I previously made it to the Y Combinator finals with Wanna Migrate — living in Chile for two months and scaling the platform to 15k users—and created Maranhão Encantado, a game recognized by Embratur’s Brasil tá pra Game. I also love teaching computer science fundamentals, having mentored over 40 engineers in data structures and algorithms for Big Tech interviews.
Latest posts
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Thinking on Scale: The Range Sum Query Lesson
A deceptively simple LeetCode problem that teaches how to think on scale — time, memory, and the tradeoffs between them.
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From Prompt to Production: Lessons from Vibe Coding an App Using ChatGPT Only
Lessons from building an app end-to-end using only ChatGPT — without writing a single line of code myself.