Julian Hernandez

I’m a Full Stack Software Engineer with a Computer Engineering degree and 3 years of intensive hands-on experience. I specialize in automating critical business processes and delivering scalable web systems that measurably reduce errors and operational friction.

At my agency role, I architected a bidirectional REST integration with SIIGO ERP using Node.js and Laravel, synchronizing invoicing, customers, inventory, and purchases in real time—eliminating 100% of manual data entry and reducing accounting errors by 90%. I also led Agile/Scrum delivery of an enterprise access control system with real-time validations, cutting check-in time by 40% for 200+ daily employees, and I mentored 2 junior developers through sprint planning and code reviews.

Beyond integrations, I built an event scheduling platform that enabled 50+ concurrent sessions and reduced scheduling conflicts by 60% through automated constraint validation. I refactored and fully normalized a legacy corporate parking database using SQL optimization techniques, boosting query performance by 50% and removing data redundancy—then standardized delivery with GitFlow branching and CI/CD pipelines to improve deployment reliability.

As a freelance developer, I design and ship full-stack solutions for enterprise clients, including a Hotel Property Management System with real-time dashboards that eliminated manual check-in records and reduced overhead by 35%. I’ve also built a decoupled REST API architecture for high availability and horizontal scalability (supporting 500+ concurrent reservations), and automated voucher invoicing/distribution via WhatsApp Business API—cutting administrative workload by 70% and eliminating distribution errors.