Alex Rivera

• –Led the rebuild of the deployments dashboard, reducing p95 load time by 68%
• –Shipped Edge Config from zero to 10,000+ customers in 3 months
• –Mentored 4 engineers and ran weekly architecture reviews across 2 time zones

• –Built the Stripe Radar rules engine UI used by 250,000+ merchants globally
• –Reduced fraud false-positive rate by 23% through improved ML signal features
• –Designed the webhooks configuration system with a zero-downtime migration

OpenBoard

Real-time collaborative whiteboard built on CRDTs. 2,000+ GitHub stars, featured on Hacker News front page.

Luma CLI

Developer tool for managing multi-environment deployments with zero config. Adopted by 3 YC-backed companies.

Carta Design System

Accessible component library with 60+ components. Cut design-to-code time by 40% across 3 product teams.