Senior product engineer — full-stack + AI. I build data-heavy products end to end — most recently financial ones: React/TypeScript front ends, Python/Django back ends, and the infrastructure that keeps them running in production. 16 years in.
Now › sponda.capital
Fundamental analysis for value investors — inflation-adjusted indicators (PE10/CAPE, PFCF10, PEG), screening, and side-by-side comparisons across ~23k listed companies.
Designed, built, and operated solo: Django · PostgreSQL · Redis · Celery · Next.js · TypeScript · sharded Playwright e2e on GitHub Actions · Docker · nginx → code
A decade in the making: look-in-tens was my 2016 PE10 experiment. Sponda is what it grew into.
Project-based work across RAG, agents, evals, fine-tuning, and observability: ai-engineering, capstone live at ai-tech-support.gustavosaiani.com. Next up: a natural-language screening agent over Sponda's fundamentals, with evals.
- Metabase — Senior Engineer, 2021–2026 · open-source BI platform, grew from 30k to 90k customers while I was there · selected merged work: auth Group Mappings UX, event visibility in visualizations, Redux store in GroupMappingsWidget
- Spoke — Team Lead, 2020–2021 · greenfield React app now tracking 1B+ parcel deliveries a year
- Toptal — Engineering Manager, 2018–2020 · Freelancer Profile app serving 7k+ freelancers in 140 countries
- EmCasa — Co-founder & CTO, 2017–2018 · React + Elixir MVP, raised $1M seed
- Poema — the value-investing partnership I've run since 2017 · CGA-certified. Fintech is home turf, not a vertical I'm visiting.
Blog · LinkedIn · gustavo@poe.ma — open to senior remote roles, working from Rio with US/EU overlap.