I build software for ideas worth thinking hard about.
I'm Alejandro — a software developer, mathematician, and AI specialist based in Medellín, Colombia. I work on the intersection of machine learning, Web3, and everyday web software.
Most of what's worth building requires both the mathematician's patience and the engineer's restlessness. I try to keep both in the room.
How I got here
A non-linear walk through mathematics, teaching, and software.
AI Specialist
LapzoBuilding intelligent learning systems powered by LLMs, RAG pipelines, and agentic workflows.
Freelance Consultant
IndependentAI consulting and full-stack development for startups — from conversational agents to image generation platforms.
Full Stack Developer
MonadicalDeveloped AI avatar systems, real-time video pipelines, and open-source tooling with Python, React, and Three.js.
Full Stack Developer
BCFortBuilt blockchain-based platforms and scalable web applications using React, NestJS, and cloud infrastructure.
Professor
Universidad de AntioquiaTaught mathematics, linear algebra, and calculus. Mentored students in mathematical modeling and computational thinking.
Principles I keep returning to
Understand before you build
Every hour spent sharpening the problem statement saves a week of code. I'd rather ship the second draft of the right thing than the first draft of the wrong one.
Small surfaces, clear edges
Complex systems are made of simple parts with well-chosen boundaries. If a component is hard to name, it's usually doing too much.
Write like you're explaining to yourself
Code, essays, and docs all reward the same instinct: assume a reader who is smart, distracted, and a little tired.
Tools & terrain
Building
- Pythondata, ML, glue
- TypeScripteverywhere else
- Next.js · Reactfront of house
- PostgreSQLdefault choice
- Solidity · EVMwhen Web3 fits
- Rustwhen it matters
Thinking & shipping
- LaTeX · Typstfor the math
- Obsidiansecond brain
- Figmafor early sketches
- Linearto stay honest
- tmux · Neovimdaily drivers
- Whiteboardsstill unbeaten
What I'm working on
- ✍︎WritingA slow series on RAG systems, aimed at engineers who want the real story.
- ⌁BuildingA small product with a friend. Details later.
- ◉TeachingTopofilosofía — a 10-week cohort on topology from the ground up.
- ❋ReadingCal Newport's Slow Productivity, papers on attention mechanisms, and Borges.
Where to find me
GitHub
Open source, experiments, and a few things I wish I'd pushed sooner.
@asanchezyali →The long-form résumé version. Light on buzzwords, I promise.
@asanchezyali →X / Twitter
Half-formed thoughts, notes from the field, the occasional hot take.
@asanchezyali →Topofilosofía
The study community. Topology, CS, slow conversation.
Join the Discord →If you've read this far, we might enjoy working together.
I take on a few projects a year. If you're building something that needs care, let's talk.