Leester Cruspero

Full Stack Developer and IT Specialist with professional experience across software development, database administration, IT infrastructure, networking, deployment, and technical support. Led the end-to-end development of an internal company portal and Document Management System used by 100+ employees, streamlining daily HR, IT, attendance, document management, and internal communication workflows.

IT Specialist at CSV Now (2025-08 – Present)

• Led end-to-end development, database administration, and IIS deployment of a company portal and Document Management System (DMS) used by 100+ employees, implementing role-based access controls and securing 1,000+ document records.
• Built core business-system features using MERN Stack for HR, attendance, IT ticketing, document workflows, and internal communications, using Claude Code to speed up feature development and debugging.
• Managed Cisco network infrastructure and configured IP-based access restrictions; troubleshot server downtime, reducing unplanned downtime by 75% and average incident resolution time by 60%.
• Delivered L1/L2 technical support, resolving 50+ tickets per month with an average resolution time under 1 hour, including root-cause analysis for recurring incidents.
• Prepared compliance documentation and supported internal system evaluation for a successful ISO audit with zero major nonconformities.

Full Stack Developer at Kre8tib I.T. Services (2024-10 – 2025-08)

• Built and deployed a full-stack MERN booking application, integrating React, Node.js, Express, MongoDB, and cloud infrastructure end-to-end.
• Developed and tested 40+ RESTful API endpoints using Node.js, Express.js, TypeScript, and MongoDB; validated API behavior with Postman before release.
• Built responsive React interfaces using TypeScript and Tailwind CSS with reusable components, reducing new-feature development time by 35%.

Bachelor of Science in Information Technology – Cordova Public College (2026)