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Hi, I'm

Luis

Platzer.

AI developer, tinkerer & architect. Building tools at the intersection of code and craft — currently exploring coffee chemistry, AI, and whatever comes next.

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ai developmentcoffee chemistrytinkeringarchitectureopen source

Tools I've Built

Useful things,
for coffee nerds.

View all tools ↗
Coffee Tool In Progress

Water Crafter

Calculate custom brewing water recipes based on Jonathan Gagne's methodology. Control mineral profiles for the perfect extraction.

water chemistrybrewingrecipes
Coffee Tool In Progress

Cupping Tool

Digital SCA cupping form for professional coffee tasting. Score, compare, and track evaluations with precision.

cuppingtastingSCA
Coffee Tool In Progress

Flavour Wheel

Interactive coffee flavour wheel based on the SCA Coffee Taster's Flavor Wheel. Explore and identify flavor notes.

flavourtastingeducation
Utility Available

QR Code Generator

Generate QR codes for WiFi, URLs, and more. Clean, fast, and works offline.

QRWiFiutility

Projects

Bigger ideas,
in the works.

01 Coming Soon

Coffee & Code Blog

A space for writing about the intersection of software craft and coffee culture. Long-form, no filler.

02 In Progress

AI Coffee Pairing

Using LLMs to suggest coffee origins and brewing methods based on your flavor profile and preferences.

03 Exploring

Roast Profile Analyzer

Analyzing roast profiles with computer vision and ML to help predict flavor outcomes before tasting.

04 Building

Self-Hosted AI Stack

Custom AI deployment infrastructure: OpenWebUI as auth/frontend, Qdrant for vector RAG, Neo4j for graph RAG — combined into a unified retrieval pipeline running on Hetzner. No cloud LLM dependency.

Setup & Stack

What I use,
every day.

Development

Software

Neovim daily driver
Claude Code AI coding
Super Whisper voice
Obsidian notes
AI Task Flow self-built

Build With

Next.js framework
Svelte / SvelteKit framework
TypeScript language
Python language
FastAI ML
Tailwind CSS styling
Vite build
CDN edge delivery
Hetzner hosting
Hardware

Dev Setup

MacBook Pro M1 16", 32 GB
Custom PC CachyOS
Samsung Odyssey G9 monitor
ZSA Moonlander keyboard
MX Master 3 mouse

Audio

Sennheiser HD 650 headphones
Focusrite ID44 interface
Coffee

Equipment

Comandante C40 grinder
Kinu M47 Classic grinder
Fellow Stagg EKG kettle
Hario V60 pour-over
Pulsar Dripper travel

About

Code and craft,
coffee and code.

I'm Luis — a software developer who spent years as a professional barista and coffee roaster before falling deep into the world of code. Now I build tools that bridge these two worlds.

Currently focused on AI development, tinkering with new ideas, and exploring what's possible when you combine craft thinking with modern software.

GitHub ↗LinkedIn ↗

photo of Luis
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Writing

Thoughts on
code & coffee.

All posts ↗

Reflection

Why I started building coffee tools

The story of how a barista became a developer.

Coming Soon

→

Coffee + Code

Water chemistry for coffee: a developer's approach

Building Water Crafter and what I learned.

May 14, 2026

→

AI

Exploring AI for specialty coffee

Where language models meet flavor notes.

Coming Soon

→

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Coffee, code, and the occasional rabbit hole.