Medium

Luiz Felipe Mendes

he/him

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Luiz Felipe Mendes

·

Mar 31

Back to the Keyboard: 4 Apps, a Sabbatical, and What AI Coding Actually Feels Like

A few months ago, I made a decision that scared me a little: I left my stable job and took a sabbatical.

Back to the Keyboard: 4 Apps, a Sabbatical, and What AI Coding Actually Feels Like

Pinned

Luiz Felipe Mendes

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Jan 29, 2025

Using OpenAI API to make a coffee barista — Part 1

Code available in: https://github.com/lfomendes/guaxinim-barista

An adorable raccoon, wearing a stylish coffee barista apron and cap, is diligently brewing a cup of coffee using the V60 pour-over method. The raccoon is intensely focused, with its little paws expertly handling the coffee dripper. The background depicts a cozy coffee shop setting with soft lighting, conveying a warm and inviting atmosphere.”

Luiz Felipe Mendes

·

Oct 27

Can design skills make Claude look less like Claude?

It’s been a bit less than a year since I left my job to work on my own projects, and most of that time I’ve been building with AI. For the…

Can design skills make Claude look less like Claude?

Luiz Felipe Mendes

·

Aug 18

Comments on Netflix's latest advances in LLMs for recommendations

Netflix

Comments on Netflix's latest advances in LLMs for recommendations

Luiz Felipe Mendes

·

Jul 29

When AI Writes and AI Reads: Why Human Work Is Becoming the Premium Tier

A while ago I was doing something pretty boring: going through the list of new signups for one of my projects. I have three of them running…

Editorial illustration, wide 2:1 aspect ratio. A closed circular loop of printed pages flowing endlessly between two identical machines — one printing pages, one consuming them — forming an ouroboros of paper. The loop dominates the frame. Off to one side, small and slightly outside the circle, a single wooden desk with a lamp, a notebook, and an empty chair. Muted palette: warm paper cream, ink black, one accent of amber from the lamp. Flat vector style with subtle grain texture, generous negat

Luiz Felipe Mendes

·

Dec 19, 2025

Lessons on LLMs, Coding, and System Design from a Short Sabbatical

After three months on sabbatical: studying, traveling, building things, and revisiting fundamentals — I felt it was worth writing down…

Lessons on LLMs, Coding, and System Design from a Short Sabbatical

Luiz Felipe Mendes

·

Oct 27, 2025

When Coding Becomes Easier Than Making a Spreadsheet

What began as a simple spreadsheet became an experiment in AI programming — and a reminder that how we build software is changing fast.

When Coding Becomes Easier Than Making a Spreadsheet

Luiz Felipe Mendes

·

Mar 27, 2025

Using OpenAI API to Make a Coffee Barista — Part 3

Welcome back to my journey of building a web-based barista app powered by Genenrative AI! If you’re new here, this is the third part of a…

Using OpenAI API to Make a Coffee Barista — Part 3

Luiz Felipe Mendes

·

Feb 14, 2025

Using OpenAI API to make a coffee barista — Part 2 (now using RAG)

Code available in: https://github.com/lfomendes/guaxinim-barista

Using OpenAI API to make a coffee barista — Part 2 (now using RAG)

Luiz Felipe Mendes

·

Dec 23, 2024

Reflections on writing about Data Science: 2024 Posts

This year, I decided to start writing and sharing knowledge about Data Science. My goal wasn’t to become an influencer on LinkedIn/Medium…

Reflections on writing about Data Science: 2024 Posts

Luiz Felipe Mendes

Luiz Felipe Mendeshe/him

Co-founded Hekima, an AI company acqui-hired by iFood. Became the Head of Data Science @ iFood (Recommendation) but now I'm back to my entrepreneurial roots.

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