creative technologist

Designer Engineer

I build bold, data-driven products that feel intentional. From ML-backed systems to full-stack web experiences, I move from concept to production with obsessive attention to detail and measurable impact.

Now booking Available for select collabs
Portrait of David Portillo
Data & AI
Full-Stack
Product Systems
Mentorship
Hello, I am David

Design-forward engineering

I thrive where aesthetics, systems thinking, and rigorous engineering meet. My toolkit spans Python, TypeScript, modern web frameworks, and ML workflows — all pointed at crafting reliable, expressive products.

I partner with teams to prototype quickly, validate with data, and ship with quality. I care about thoughtful architecture, performance, and clear communication that keeps everyone aligned.

Intentional builds only
Selected cases

Recent work with a brutalist twist

ML · Computer Vision · Backend

Well Log Digitizer

FastAPI + OpenCV pipeline that converts scanned oil & gas well-log TIFFs into structured LAS files. Multi-stage image processing with debug artifacts for transparency and production-ready outputs.

Built with Nexus Energy Partners on real-world data.

Log to LAS
UX/UI · ML Engineering

MNIST Bayesian Optimization

Convolutional models tuned with Bayesian optimization, automated early-stopping, and reproducible reports for stakeholders.

Model tuning
NLP · Systems

QA-Bot

Semantic search pipeline with BERT embeddings, context ranking, and latency-aware API layers for reliable answers.

Answer engine
Full-stack · Auth

Secure Auth Platform

JWT-based authentication with role-aware dashboards, polished onboarding, and hardened API gateways ready for production.

Product build
Data · Observability

Impact snapshots

Scaled ML-backed QA to 25k+ monthly queries, cut training time by 40%, and shipped 0→1 dashboards with tight instrumentation.

Signals