Senior Software Engineer
16 years building high-scale software at companies like Metabase, Toptal, and Spoke. From greenfield MVPs to platforms serving millions. Led engineering teams and managed orgs along the 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.
Side Projects

poe.ma
Value investment partnership. 356% cumulative returns from Jan 2017 to Dec 2025, outperforming the Brazilian stock index by 2.1x.

doingit.online
Minimalist task and time tracker. Type a task name and start the clock.

sponda.capital
Financial indicators for Brazilian public companies, built for value investors.

gustavosaiani.art.br
Paintings portfolio.
Skills