Todas as entradas · 20
Diário de observação
Um diário do bacharelado em Ciência de Dados no ITAM, uma entrada por semestre: a matemática e a estatística por trás, a computação, a economia e as humanidades em que o curso insiste. Escrito ao longo do caminho, em primeira pessoa.
Feed RSS ↗- Computação
From syllabi to stars: how I mapped my skills to their sources
Every star in the skills section now carries a provenance: the course, job or project behind it. How I rebuilt the official programmes of Bátiz and ITAM, and what I decided not to claim.
- Computação
WhisperFlow: why I built voice dictation that never leaves my machine
I wanted the convenience of cloud dictation without giving away my voice. WhisperFlow is the result: offline push-to-talk for Windows with two swappable speech engines, a native orb overlay and a threat model written before the code.
- Personal project
- Astronomia
Pulsars: the lighthouses that keep time better than an atomic clock
A pulsar is a neutron star spinning tens of times per second, sweeping the sky with a beam of radiation. How they were discovered by accident, why they are the most precise clocks in the universe, and what they have to do with a data degree.
- Astronomia
The Helix through James Webb's eyes: the Sun's future in a photograph from January 2026
The Helix Nebula is a Sun-like star in its final phase, only 650 light-years away. In January 2026 Webb released a view of its cometary knots that is the image of this page's Personal category. What it shows and why I chose it.
- Astronomia
Carina: why my favourite nebula is a stellar nursery
The Carina Nebula is the image that opens this page's observatory and the one I chose for the academic category. What it is, what the James Webb telescope saw in the Cosmic Cliffs, and why a place where stars are born is the right metaphor for a school.
- Astronomia
Why this site computes the real sky over Mexico City
The sky on the home page is not a decorative animation: it is the sky above Mexico City at the moment you open the page, computed with sidereal time and a change of coordinates. Here is the mathematics, and why the degree made it easy.
- Ciência de dados e IA
Big data, mining, multivariate methods and the applied project (eighth term, in progress)
What I am taking now: architecture for large data volumes, data mining and analysis, multivariate methods and the first half of Applied Data Science, which since this fall can replace the thesis. What I hope to get out of each.
- Architecture for Large Data Volumes
- Data Mining and Analysis
- Multivariate Methods
- Applied Data Science I
- Probabilidade e estatística
Causal inference, MPI and the ethics of deciding with data
Linear Methods and Causal Inference gave rigour to the question of whether X causes Y; Parallel Computing had me write an MPI Bag-of-Words in C++; Artificial Intelligence opened the box of agents; and the ethics seminar reminded me that data belongs to people.
- Linear Methods
- Causal Inference
- Artificial Intelligence
- Parallel and Cloud Computing
- Computação
A parallel Bag-of-Words with MPI and what measuring teaches
The Parallel Computing project: implement Bag-of-Words serially and in parallel with MPI in C++17, compare two ways of splitting documents across processes, and discover that intuition loses to the stopwatch.
- Parallel and Cloud Computing
- Ciência de dados e IA
ECOBOX AI: doing research with students who have exams
At DataLab ITAM I was part of the ECOBOX AI team, a computer-vision model for classifying waste. We delivered the model and a paper; the hard part was not the technique but doing research with people who have exams.
- DataLab ITAM · Research Manager
- Ciência de dados e IA
Maximum likelihood, bias-variance and the first job
Mathematical Statistics and Machine Learning in the same term are the best pairing in the curriculum: one tells you why an estimator works and the other what happens when you let it loose on data. In November I started working in data at Mercado Pago Point.
- Mathematical Statistics
- Machine Learning
- Information Visualization
- Topics in Public Policy I
- Trabalho
My first job interview: nerves, school projects and a seat at Mercado Libre
I had never done a job interview. The first one was for Mercado Libre, competing with candidates from ITAM, UNAM and Tec. What they asked, why I was shaking, and what I would do differently.
- Computação
APIs, JSON, the central limit theorem and auctions
Data Sources and Non-Relational Databases had me extracting and structuring real-world data; Probability II closed with the law of large numbers and the central limit theorem; Market Design taught me to think in incentives.
- Data Sources
- Non-Relational Databases
- Probability II
- Market Design
- Ciência de dados e IA
577 World Cup shots and a model you can explain
Keeper Save Probability: a prototype to estimate the chance a goalkeeper makes the save, built with logistic regression, Monte Carlo uncertainty and a grid search over positions. Why I chose the simplest model on purpose.
- Probability II
- Market Design
- Liderança
AIESEC: hosting volunteers from the world, then leading a team, at twenty-one
A year at AIESEC in ITAM: hosting foreign volunteers in social projects in Mexico City, then leading a three-person team that sends students abroad. What I learned about funnels, 1:1s and working English.
- Team Member · Incoming Global Volunteer (Jan–Jun 2024)
- Team Leader · Outgoing Global Volunteer (Jul–Dec 2024)
- Probabilidade e estatística
Sigma-algebras, SQL and the Porfiriato
The term where real statistics began, with Probability I, and where databases stopped being tables and became a formal model. Also the term of Mexican history, from the viceroyalty to the Porfiriato.
- Probability I
- Databases
- Advanced Data Structures
- Economics IV
- Computação
Big-O, Lagrange multipliers and Marx's critique
Data Structures gave me the vocabulary for computational cost; Calculus III, constrained optimization; and the last part of Ideas and Institutions, the critiques of the world the first two had built.
- Data Structures
- Discrete Mathematics
- Calculus III
- Economics III
- Matemática
Learning to prove: Mathematical Thinking, Linear Algebra and the social contract
The second term gave me the language I still use: proofs by induction, eigenvalues, least squares as geometry, and Modernity from Hobbes to Kant read aloud.
- Mathematical Thinking
- Linear Algebra I
- Calculus II
- Economics II
- Matemática
Calculus, supply and demand, and Plato in the same week
What the first term of Data Science at ITAM taught me: that the degree is mathematics before it is code, and that reading Plato on Tuesday and differentiating on Thursday is not a contradiction but the design.
- Calculus I
- Vector Geometry
- Algorithms and Programs
- Economics I
- Computação
The Bátiz: three years as a programming technician at the most demanding IPN high school
I entered CECyT 9 "Juan de Dios Bátiz" on 13 August 2018 and left on 23 July 2021 with a bivalent diploma: a high-school certificate and a technical degree in programming. What is taught there, why it has the reputation it has, and what it left me.
- Object-Oriented Programming
- Web Programming and Services
- Databases
- Introduction to Test Engineering