São Paulo · GMT-3 · English C1 · Portuguese native
About.
I'm Anderson Rocha, a frontend engineer from Brazil. Since 2019 the work has followed one thread: interfaces with real operational weight — a financial portal with 4M+ users, consultant onboarding across 50+ countries, an AI SaaS organizing enormous document collections, a catalog platform rebuilt for 27 countries, and now crypto merchant flows at PayPal.
What I optimize for hasn't changed much: systems that stay fast and legible as they grow. Typed contracts between frontend and API. User journeys covered by tests that walk the real flow. Performance work you can measure before and after. Documentation that lets another team pick up the work without me in the room.
I also invest in how teams build — mentoring, structured frontend training, code-quality and standardization efforts, and piloting AI-assisted development workflows at both PayPal and BairesDev, evaluated like any other engineering tool.
Timeline
2026 —
Senior Frontend Engineer · PayPal
Crypto for new account types — E2E-tested journeys, cross-team gap analysis, primary technical point of contact.
2025 – 2026
Senior Frontend Engineer · BairesDev
AI-driven SaaS: tree navigation architecture, optimistic UI with React Query (+34% perceived responsiveness), Stripe billing, test coverage to ~80%.
2023 – 2025
Frontend Engineer · Singular Apps
From-scratch Next.js platform rebuild across 27 countries; bulk imports at 100k+ catalogs; onboarding rework behind a 35% acquisition increase.
2021 – 2023
Frontend Engineer · Thoughtworks
Global cosmetics platform onboarding (50+ countries, 6M+ consultants) with Cypress and TDD; mobile-first refactor that lifted mobile adoption by ~45%.
2019 – 2021
FullStack Engineer · Compasso UOL
Financial services client (4M+ users): legacy portal to React SPA (+40% performance), Node.js BFF layer, async optimization (-22% response time).
Off the clock
I keep a few systems of my own to test ideas end to end. The public one is GymFlow — Next.js App Router, React Server Components, NestJS + GraphQL. Two private ones go further: a cross-platform personal finance app (Electron and React Native sharing one design system, AI-assisted transaction categorization) and a multi-agent AI orchestration system running in production on my own infrastructure.
If any of that sounds relevant to what you're building, get in touch.