Portfolio · 2026
Product,
strategy,
build &
data.
The kind who ships the thing and runs the numbers. Computational neuroscience by training, conversational AI by trade, with a portfolio of side products to keep the hands on the keys.
Side products & case studies
- Lenny RAG / EigenPM Explorer Knowledge-graph RAG over 297 Lenny's Podcast transcripts, plus a 3D PCA map of those guests you can place yourself inside. Open →
- Eval framework for a production conversational-AI system How do you measure whether a production conversational-AI system is actually getting better? An eval taxonomy, a labeling protocol, and the downstream changes it forced. Open →
- Idiograma Spanish tense and aspect made visible: any sentence becomes an interactive timeline, built on a homegrown linguistic theory. Open →
- Experimentation infrastructure Instrumentation, BigQuery + dbt, CUPED for variance reduction, and a build-vs-buy memo that kept us out of a multi-year vendor lock-in. Open →
- Quantifying Consciousness MSc thesis: EEG complexity measures for Disorders of Consciousness — 183 subjects, 732 datasets, two methods, consciousness as criticality. Open →
- Claudius Secretary Personal-assistant system built on Claude Code — and a live study in where an agent's autonomy should end. Open →
- Cartonic Absolute-pitch identification trainer: it plays a note, you name it, and your misses accumulate into a map of how you hear. Open →
- Rigorously A practice environment for designing rigorous online experiments — power, CUPED variance reduction, common pitfalls. Open →
- Breatheasy iPhone PWA that watches a baby monitor's video feed for rhythmic breathing motion. Open →
- Spain-TaxSim IRPF simulator handling Spanish tax bands, deductions, and the regional variations that catch everyone off-guard. Open →
- Pájaros Bird-mortality dashboard for Fuerteventura electric-line collisions (2018–2026). Open →
- Hamama (Web + Orders) End-to-end for a small greenhouse-direct business: public site for customers, orders backend for the operator. Open →
- Thinking Canvas Particles that riff on what an LLM is discussing as it works — not a window into its internals. Open →
- BLW Planner Personalized baby-led-weaning meal planner with allergen tracking and a 28-day intro plan. Open →
- Squiggle Slack-integrated photo annotator. Quick markup, no context switch. Open →
One person, many facets
7 years shipping ML, language and AI products for millions. Scaling good globally; a teacher at heart. Hands-on, from ideation to release, deep teamwork in the trenches. Builder of products, systems and relationships. Computational neuroscience by training, linguistics by obsession, data and logic by second nature, humor by first.
01 / 06 · facets
Product
Clear hypotheses, sharp scoping — most of the leverage is in deciding what not to build.
Ask anything.
It answers in ink.
The signature at the corner of your screen is an AI representing Ben — grounded in his own write-ups of the work here, gated behind public evals it had to pass first, and honest about its limits. It drafts, never sends. It declines the personal. And it signs every answer.
How it works →
Say hi.
The old-fashioned way.
Three doors straight to a human — for anything the assistant can't or shouldn't answer.
It's in Madrid · EN / ES / HE · or just ask the signature in the corner.