Crosscheck
Founding Engineer / CTO
Leading technology for supply-chain compliance, from evidence collection through audit-report finalization.
Raphael Costa
Product / AI Engineer
I build AI-native products and the software platforms behind them.
Currently CTO at Crosscheck. Over 18+ years, I’ve worked as a founding engineer, product leader, and founder across workflow software, developer platforms, and AI agents.
🇧🇷 Brazilian currently living in the San Francisco Bay Area · 🇺🇸 U.S. O-1 visa
Experience
Gumroad / Antiwork Repository
Senior Software Engineer
Worked on Gumroad’s open-source Ruby on Rails product and led Helper, an AI-agent support product handling more than 28,000 conversations each month.
Pipefy
Founding Engineer → Principal Engineer / Technical PM
Built the Ruby on Rails core product, public GraphQL API, Apps platform, and Pipefy AI; helped grow Pipefy from zero to more than 4,000 customers and more than $140M raised.
ateliware, Sage, Experia, HSBC
Full-stack Engineer
Built Ruby on Rails products at ateliware and Sage, alongside APIs, ecommerce systems, and enterprise software across startup, agency, and banking teams.
Founder programs
- CrosscheckTechstars New York City
- Pipefy500 Startups · San Francisco
- Founder communityOn Deck Founders (ODF) · San Francisco