Full stack developer
Hi, I'm Andres, a full-stack software engineer based in Brazil.
I build digital products across mobile, web, and backend using React Native, React, Node.js, PHP, and TypeScript.
Lately, I've been working on financial products, mobile app flows, push notification architecture, card microservices, and backend integrations.
I care deeply about ownership, consistency, and building software that is reliable in production, not just clean in the codebase.
Want to work together? Book a call.
Projects
Studies
A foreach isn’t always the problem—what happens inside it matters. In this article, I explain how to identify and eliminate the N+1 query problem, replacing repeated database access with two fixed queries and efficient in-memory processing. A practical example of how a small refactoring can improve performance, reduce database load, and make an application scale more predictably.
Secure app-to-web subscriptions with Expo Web Browser, Redis temporary tokens, and re-authentication.
Elsewhere
Where to find me online
- GitHub
- andres-dos-santos
- Discord
- andresdsba