Case Studies
Technical documentation of production projects I've architected and scaled. These projects serve hundreds of thousands of Brazilian users and demonstrate expertise in systems architecture, legacy migration, and performance optimization.
Education Secretariats (SEMED/SEDUC)
Enrollment Platform - State of Amazonas Government
Distributed Architecture & Performance Optimization
Challenge
Legacy system in Natural/ADABAS handling 10k simultaneous users. Enrollment period (December) caused crashes due to concentrated traffic. Need to scale 5x while maintaining critical uptime.
Technologies & Concepts
Key Learnings
- → Migration from Natural/ADABAS monolith to cloud-native microservices architecture
- → Load testing and capacity planning for predictable demand peaks (.gov)
- → Compliance and accessibility requirements in state platforms
- → Distributed caching strategies in high-concurrency systems
- → Container orchestration in heterogeneous environments
State Education Secretariat (SEDUC) & Manaus City Hall
SIGEAM 2.0 - Integrated Education Management System
Legacy Migration → Web | AI-Powered Rule Extraction | Full-Stack Architecture
Challenge
Monolithic Natural/ADABAS system integrating all education services (state + municipal). Used across 1000+ schools with hundreds of thousands of users. Required migration to modern web architecture while maintaining 500+ complex business rules and ensuring zero downtime.
Technologies & Concepts
Key Learnings
- → Extracting complex business rules from legacy Natural/ADABAS using Claude AI - automating reverse-engineering
- → Full-stack web architecture for enterprise education systems serving 1000+ institutions
- → Managing scope in large-scale .gov projects with competing requirements (state vs municipal)
- → Database schema normalization from hierarchical (ADABAS) to relational (PostgreSQL)
- → Progressive rollout strategy to 1000+ schools with minimal disruption
- → Integration patterns between modern REST APIs and legacy system dependencies