Senior Product Engineer. Full-Stack + AI
I build data-heavy products end to end and ship AI-native.
Currently building and operating sponda.capital solo.
Before that, five years shipping open-source BI at Metabase.
16 years in software, remote the whole way.
Experience
Delivered core features of the open-source BI platform used by 90,000+ organizations including enterprise and government clients. Improved application performance as the company grew revenues ten-fold. Revitalized public-facing projects through SEO and LLM optimization, contributing to growth from 30k to 90k customers.
Led development of a greenfield React application enabling real-time package tracking, now supporting over 1 billion parcel deliveries annually. Elevated code coverage from 0% to 70%, reducing bugs by 70%. Assembled and managed a team of React developers.
Helped drive over $200M in annual revenue building a Freelancer Profile app serving 7,000+ freelancers across 140+ countries. Built public-facing pages with SSR, achieving $4 per-visit revenues. Implemented A/B testing and personalization during 20% YoY company growth.
Designed and launched a real estate marketplace MVP using React and Elixir. Raised $1M in seed funding and facilitated the sale of dozens of properties in its first months of operation.
Projects
sponda.capital
Fundamental analysis for value investors: inflation-adjusted indicators (PE10, PFCF10), screening, and side-by-side comparison across ~23k listed companies. Designed, built, and operated solo. CI with sharded e2e, Docker, nginx, multi-layer caching.
noralab.com.br
AI for healthcare professionals: a WhatsApp agent that books real appointments through Google Calendar, plus clinical note-taking tools. Built and shipped with a team of three.
doingit.online
Minimalist task and time tracker. Type a task name and start the clock.
github.com/gusaiani/ai-engineering
Project-based AI engineering curriculum. 13 modules from LLM API basics to multi-agent systems, built for portfolio over credentials.
poe.ma
Value investment partnership. 339% cumulative returns from Jan 2017 to Jun 2026, outperforming the Brazilian stock index by 1.8x.
swankdown.gustavosaiani.com
Transforms Markdown into beautifully typeset reading pages with refined typography.
gustavosaiani.art.br
Paintings portfolio.
Skills