Trisvan Leyesa
Portrait of Trisvan Glenn Leyesa

Batangas City, Philippines — since 2017

I keep critical systems running.

I'm Trisvan — a full-stack engineer with 9+ years building software that bills utility customers and runs manufacturing floors. Here, a bad query can delay a utility billing run or stop a manufacturing line.

My work is mostly modernization: turning legacy modules into systems that are faster, testable, and safe to deploy. I've reduced manual processing by 90%+, backend execution time by 60–70%, and production defects by ~30%.

I use AI as an engineering accelerator for architecture, implementation, code reviews, and testing. It speeds up delivery without lowering the quality bar.

Now — Sr. Full Stack Developer, M.A. Technology Inc. Stack — PHP · Node · React · SQL Server
Portrait of Trisvan Glenn Leyesa
02 — Toolkit

What I reach for

Languages
JavaScript, TypeScript, PHP, SQL
Backend
Node.js (NestJS, Express), Laravel
Frontend
React, Next.js, AngularJS
Data
PostgreSQL, Supabase, SQL Server, MySQL
Infrastructure
Docker, GitHub Actions, IIS, Nginx, Apache
Tooling
Git, GitHub, Codex, Claude Code
Practice
REST API development, JWT, database design, system integration, testing & debugging
03 — Experience

Nine years, two organizations

Jul 2022 — Present

Sr. Full Stack Developer

Current

M.A. Technology Inc.

  • Designed and automated manufacturing workflows through QR-based processing and system validation rules, reducing manual paper-based processing by 90%+.
  • Optimized backend performance by 60–70% and reduced production defects by ~30% through query optimization and automated unit testing.
  • Leveraged AI coding agents (Codex and Claude Code) to accelerate development, refactoring, code reviews, and unit test generation while maintaining code quality.

Jan 2021 — Jul 2022

Software Engineer

Gzonetech Inc. (affiliated)

  • Modernized 5 critical UMS modules, improving maintainability, validation handling, and operational stability.
  • Optimized legacy MySQL queries and reporting processes, improving billing/report generation performance by 60–70%.
  • Coordinated deployments and resolved production issues across multiple IIS environments, improving release stability and minimizing operational disruptions.

May 2020 — Dec 2020

Software Engineer

Utility Solutions Inc. (affiliated)

  • Maintained and enhanced core UMS modules supporting utility billing and operational workflows for enterprise clients.
  • Diagnosed and resolved production billing issues, improving system reliability and reducing operational downtime.
  • Assisted in system integrations and backend data synchronization processes to ensure accurate transmission of billing and customer data.

Jun 2017 — Feb 2020

Associate Software Engineer

Fieldtech Specialist Inc. (affiliated)

  • Developed and maintained features for Utility Management System (UMS) platforms, supporting customer, billing, and field operation modules.
  • Built audit dashboard features with analytics, reporting, GPS visualization, and API integrations for field operations.
  • Maintained and resolved issues within legacy systems, database updates, and bug resolution efforts, improving system stability and operational efficiency.

Fieldtech Specialist, Utility Solutions, and Gzonetech are affiliated companies under the same organization — 2017–2022 was one continuous run inside that group.

Education

BS in Information Technology — AMA Computer College, Batangas · 2014–2017

04 — Selected work

Three systems worth describing

UMS Utility Management System dashboard screenshot UMS Utility Management System reporting screenshot

01 — Enterprise / Utilities

UMS — Utility Management System

Full-stack platform deployed across enterprise clients including MORE POWER, MLWD, and MERALCO ECOZONE. Worked within a team of 8–10 developers, DBAs, and testers to build and maintain 5 core modules — Customer, Field, Billing, Work, and Collection — integrating with external utility platforms and optimizing MySQL queries to sharply cut report generation time.

Video is a publicly available demo from a previous employer; I contributed as a full-stack developer.

AngularJS · PHP · MySQL · Google Maps API · GitHub

View project details →
Production Process Checksheet System screenshot Production Process Checksheet System screenshot Production Process Checksheet System screenshot

02 — Manufacturing

Production Process Checksheet System

A QR-enabled production traceability system that replaced manual checksheets on the manufacturing floor. I built validation safeguards against out-of-sequence station processing, backend guards against duplicate data, and structured audit logging for full production traceability — cutting manual processing by 90%+.

React · Laravel · Express · SQL Server · GitHub

03 — Field Operations

Audit Admin / Dashboard System

A web-based audit administration dashboard for retail store inspections. Built reporting and analytics to monitor product compliance and field performance, field-personnel tracking via GPS coordinate data on Google Maps, and backend APIs that consolidated audit submissions and transmitted results securely to client systems.

AngularJS · PHP · SQL Server · Google Maps API

05 — Contact

Say hello

Open to engineering roles and project work — especially backend-heavy systems, legacy modernization, and reliability-focused builds.

Email tglennleyesa@gmail.com Phone 0916-747-2685 LinkedIn in/trisvan-glenn-leyesa GitHub github.com/tglennleyesa Résumé Trisvan Glenn Leyesa — resume.pdf