
full-stack developer, brazil
André Luizdos Santos
I'm a full-stack developer with a degree in Information Systems. I like building web systems for real operational problems, especially when they involve data organization, internal processes and routines that need to work reliably day to day.
I've been working with Next.js, React, Node.js, NestJS, Prisma and MySQL, on both frontend and backend. I'm interested in software engineering, data modeling, business rules and systems that are small enough for a team to actually use.
stack
projects
- 2026Management platform for a graduation events company
System that replaced spreadsheets, WhatsApp, Google Drive and paper in the operations of a graduation events company with over fifteen years in business.
- 2025Photo organizer with face recognition
Python tool that detects faces and clusters event photos by person, replacing manual sorting.
- 2024Clinic management system (undergraduate thesis)
Web application for medical clinics: scheduling, records, and access control.
posts
May 28, 2026
Secure login system in NestJS.
A NestJS login broken down piece by piece: bcrypt, JWT, httpOnly cookie, and the security decisions hidden in each step.