Product engineer · Porto Alegre, Brazil
Hi, I'm Rafa. I build products at PostHog.
9+ years shipping full-stack software, from seed-stage to 100M+ ARR startups. Currently leading Growth at PostHog. When I'm not at the keyboard I'm usually at an airport.
Work
Now
Leading Growth at PostHog
Onboarding, activation and the paths that turn a signup into a paying customer. Also responsible for trying to figure out how do we grow in an agentic world.
Before that I started Revenue Analytics on my own and shipped Core Web Vitals for Web Analytics.
PostHog (opens in new tab)In the open
Two years of pull requests to posthog/posthog
All public. I built the Core Web Vitals view #27479(opens in new tab) in my first months. Also a toolbar that loads in a kilobyte #69093(opens in new tab).
On Growth I shipped organisation-level product push campaigns #67968(opens in new tab) and the empty state screens for every product #74452(opens in new tab).
Lately it has been authentication: PostHog as an OpenID Connect provider #99353(opens in new tab), and partners authenticating as OAuth clients #74089(opens in new tab).
All of them, since November 2024(opens in new tab)MCP
Model Context Protocol, at work and at home
At PostHog I helped architect our first MCP, built apps that render inside MCP clients #46063(opens in new tab), and added Client ID Metadata Documents so clients such as Claude Code connect with a URL instead of registering first #52324(opens in new tab). Here, this site runs its own MCP server, so you can point Claude or Cursor at it and ask about me.
This site's MCP serverSide business
Trio Assinaturas
A platform for subscription box clubs in Brazil: plans, subscribers, recurring card and PIX billing with retries, shipping, a sales page and checkout, and a member area where subscribers help themselves.
trioassinaturas.com.br (opens in new tab)
Writing
All postsLong-form, infrequent, and usually with data attached: sorting algorithms and hash tables from university, what applying to remote jobs actually looks like in numbers, and what happen when I let Claude move this site off AWS.
Beyond work
Computer Science at UFRGS, summa cum laude, with an exchange year at TU Kaiserslautern in Germany and two trips to the Brazilian ICPC finals along the way. Married to Lili since April 2026. Our cat is called Aura.
Travel is the other constant: 22 countries and territories so far, most of them shared with Lili. The changelog keeps the running record, from offsites in Barbados and Tulum to watching a total solar eclipse from a boat off Mallorca.
- 22Countries
- 120Flights logged
- 9+Years shipping
- 1Cat