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EJ Centeno

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EJ Centeno

Frontend Web Developer

Professional headshot of EJ Centeno, Frontend Web Developer

Résumé

Efren James "EJ" Centeno

Frontend Web Developer

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Summary

I'm a Frontend Developer with 3+ years of experience building enterprise-grade applications using Vue.js, Nuxt.js, React, and modern JavaScript frameworks. Currently at C3 Interactive Manila, I develop React-based systems for clients in the airport and financial sectors, focusing on component architecture, state management, and REST API integration.

My development journey began during my studies in Computer Technology and Information Technology at Bulacan State University, where I discovered my passion for creating user-centered digital solutions. Before joining C3 Interactive, I spent over three years at MYCURE building HIPAA-compliant healthcare web applications serving 100+ organizations and handling 50K+ monthly appointments — work that sharpened my understanding of complex workflows and production-grade engineering.

I'm skilled in QA testing and client collaboration, having conducted product demonstrations, provided end-user training, and participated in Agile sprints throughout my career. I have hands-on experience with Cypress for E2E testing and have worked closely with designers and product managers to ship reliable, accessible interfaces.

Prior to my tech career, I built strong communication and customer service foundations working in the food industry — experience that continues to inform how I approach stakeholder collaboration and user empathy. When I'm not coding, you can find me exploring Philippine mountains through cycling and hiking adventures.

Principles

What guides the work.

Vision

“Building inclusive tools that outlast the trends that shaped them.”

Frontend that ages well — accessible by default, readable in six months, and built on patterns that survive framework churn. The libraries change every year. The principles don't.

Mission

“Code that reads like prose, ships like clockwork.”

Components stay small. Types stay strict. Reviews stay kind. Every ticket is a chance to leave the codebase clearer than I found it — for the next developer, and for myself in six months.

In motion

  • Master Full-Stack Development

    Expand my backend skills to complement my frontend expertise and become a well-rounded developer capable of building complete applications.

  • Contribute to Open Source

    Actively participate in open-source projects to collaborate with the global developer community and improve my code quality.

  • Develop Technical Leadership Skills

    Build expertise in architectural decisions and gain experience in mentoring junior developers to grow into a technical leadership role.

  • Create Impact-Driven Projects

    Develop applications that solve real problems and positively impact users' lives, with a focus on accessibility and inclusive design.

Experience

Feb 2026 – Present

Currently

Front-End Developer

C3 Interactive Manila

Building and maintaining React 19 web applications for clients in the aviation and financial sectors. Developing modular frontend components for a stock administration system using React Hook Form, Zod, TanStack Table v8, and shadcn/ui. Implementing server-side state management with TanStack Query and Zustand. Handling Drupal CMS content operations for multiple clients and producing HTML email campaigns (EDM). Collaborating on UI designs via Figma and integrating a Laravel 12 + API Platform backend.

ReactJSHTMLCSSTailwindCSSLaravelDrupalMySQL

Jul 2022 – Sept 2025

Junior Web Developer

MYCURE

Built and maintained web applications serving 100+ organizations in the healthcare sector. Developed a HIPAA-compliant PWA handling 50K+ monthly appointments. Integrated REST APIs and real-time dashboards for operational visibility. Participated in manual and automated QA testing using Cypress. Collaborated using Vue.js, Quasar, Vuetify, and Nuxt.js in Agile sprints.

VueJSQuasarCypressJavaScriptTypeScriptVuetifyHTMLCSSTailwindCSS

Dec 2021 – May 2022

Service Crew

Bonchon Chicken

Provided customer service and support in a fast-paced food service environment.

May 2021 – May 2022

Delivery Biker (Part-time)

Foodpanda

Part-time food delivery service. Demonstrated time management and adaptability while transitioning into a tech career.

May 2016 – Jul 2021

Service Crew

Jollibee Foods Corp.

Developed strong work ethic, time management, and customer service skills across multiple roles in food service operations.

Education

2017 – 2019

BS Information Technology – Undergraduate Coursework

Bulacan State University

Undergraduate studies focused on programming and web development technologies.

2015 - 2017

Associate in Computer Technology

Bulacan State University (BulSU)

Foundational coursework in programming, data structures, networking, and information systems. Originally enrolled in BSEE, later shifted to BSIT and then ACT due to K-12 curriculum restructuring. Planning ETEEAP completion of BSIT once professional experience meets the five-year minimum.

2012 – 2015

BS Electrical Engineering – Undergraduate Coursework

Bulacan State University

Undergraduate studies in electrical engineering fundamentals.

2008 – 2012

Secondary Education

Bulacan State University Laboratory High School

Completed secondary education at the laboratory high school of Bulacan State University.