About Me
Alejandro Arias Rojas
I'm a Business Informatics student at the Universidad de Costa Rica and a freelance software developer. I build production-grade business systems, not classroom exercises — two of the projects on this site were sold as paid freelance work and are running in production today.
My work combines software engineering with business process thinking. Before writing a data model, I look at how the work actually happens today — the paperwork, the spreadsheets, the exceptions nobody wrote down — and design around that instead of a generic template.
Lately I've been going deeper on Azure: SIGAU, one of my database projects, runs on Azure SQL Server with Row-Level Security and Dynamic Data Masking, and I'm currently preparing for the AI-200 (Azure AI Cloud Developer Associate) certification.
Professional Experience
Independent Software Developer
Nov 2025 – Present. Freelance work for real clients, plus independent products built to the same standard.
LICS — ERP for Laboratorio de Inyección Castro Solís
Offline-first ERP that replaced a legacy DBF system for a real fuel-injector lab. Live in production today.
Jewelry Management Platform — Cuero&Perla
Point of sale, inventory and public storefront for a real jewelry retailer. In production for 9+ months with active support.
EsteticaPro — Appointment Management Prototype
API-first scheduling platform for beauty salons, built to prove out a SaaS idea end to end. Prototype, not yet deployed to a paying customer.
Academic & Team Projects
Coursework at Universidad de Costa Rica
Built with classmates as part of the Business Informatics program — included because the skills are real, labeled because the credit is shared.
SIGAU — Database Security & Administration on Azure SQL
University database-administration project: hardened SQL Server with Row-Level Security and Dynamic Data Masking, then migrated to Azure SQL Database.
Network & Security Infrastructure — IF5000
Hardened multi-service Linux server built with a team of 4: Docker workloads, a Tailscale VPN, Suricata IDS and a real-time security alerting pipeline.
TCP/IP Remote Administration Tool
Client-server remote administration tool built from raw TCP sockets — system info, screen capture and live mouse control over a custom protocol.