Selected Projects
These projects represent real delivery under constraints: tight timelines, complex requirements, and production systems that needed to work reliably. Each case shows the context, challenges faced, and outcomes delivered.
Healthcare Platform Migration
Context
Legacy PHP healthcare platform handling patient data and compliance requirements. System was experiencing performance issues and security concerns.
Challenge
Zero-downtime migration from PHP to Spring Boot while maintaining data integrity and regulatory compliance. The system needed to remain operational throughout the transition.
Solution & Impact
- •Designed microservices architecture to replace monolithic PHP system
- •Implemented parallel data processing to ensure zero downtime
- •Built automated testing pipeline for compliance validation
- •Delivered 60% improvement in response times post-migration
Tech Stack
CEDU Educational Platform
Context
Multi-tenant educational platform serving students and teachers across Guatemala. Built and maintained as solo developer, handling both backend and frontend development. Currently providing ongoing maintenance and feature development.
Challenge
Single developer responsible for entire platform including user management, course delivery, assessments, and reporting. Needed to balance feature development with system reliability.
Solution & Impact
- •Designed multi-tenant architecture with clear tenant isolation
- •Built automated assessment and grading system
- •Implemented real-time progress tracking and analytics
- •Created intuitive interfaces for both students and teachers
Tech Stack
WordPress Performance Optimization
Context
Custom WordPress site for marketing agency with 50K+ monthly visitors. Site was experiencing 8+ second load times and high bounce rates affecting conversions.
Challenge
Optimize performance while maintaining custom WooCommerce checkout flow and existing functionality. Needed significant speed improvements without breaking features.
Solution & Impact
- •Reduced load time from 8 seconds to 2 seconds (75% improvement)
- •Developed custom caching plugin for image optimization
- •Implemented CDN with Redis caching layer
- •Optimized checkout flow resulting in 40% conversion rate increase
Tech Stack
RutaPOS Android Application
Context
Android point-of-sale application for retail businesses managing inventory, sales, and customer data. Application needed to work reliably in field conditions with intermittent connectivity.
Challenge
Create intuitive mobile interface for complex POS operations with offline functionality. Needed seamless synchronization with backend systems when connectivity returned.
Solution & Impact
- •Built offline-first architecture using local SQLite database
- •Implemented conflict resolution for data synchronization
- •Designed intuitive sales workflow for retail staff
- •Created real-time inventory synchronization system
Tech Stack
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