Nestor Zaldivar, Developer in Montreal, QC, Canada
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Nestor Zaldivar

Verified Expert  in Engineering

Software Developer

Montreal, QC, Canada
Toptal Member Since
October 9, 2020

Nestor is a proficient and creative WordPress developer with a decade of experience building engaging and interactive websites. Nestor has a solid knowledge of all aspects of WordPress website creation with extensive hands-on experience in back-end and front-end development.


Dentsu Aegis Network - Isobar
WordPress, WordPress VIP, Docker, CircleCI, GitHub, React, WordPress Plugins...
Global Technology Advisory Firm
PHP, WordPress, WordPress Themes, React, PHP CodeSniffer, ESLint, GitHub, HTML...
WordPress, WordPress Themes, WordPress Plugins, Vimeo API, Stripe API...




Preferred Environment

Ubuntu, MacOS, Git, PhpStorm

The most amazing...

...thing I've developed is a WordPress multisite for a travel agency that allows them to build and sell their tours through several websites with unique styles.

Work Experience

Senior WordPress Architect

2022 - 2023
Dentsu Aegis Network - Isobar
  • Maintained a WordPress multisite, developed new features, and fixed bugs as needed.
  • Optimized database queries for website improvement.
  • Developed a custom plugin from scratch for the multisite.
Technologies: WordPress, WordPress VIP, Docker, CircleCI, GitHub, React, WordPress Plugins, WordPress Themes, WordPress API, WordPress Multisite, Jira, Technical Architecture

WordPress Developer

2021 - 2022
Global Technology Advisory Firm
  • Built a new WordPress theme from scratch to replace the old one, optimizing and improving the website performance.
  • Developed the front-end using a private UI library based on React, integrated React with WordPress, and created JavaScript features in React.
  • Wrote WordPress Unit Tests to verify each function or class method from the WP theme. Collaborated with the DevOps team to automate the unit testing in GitHub.
  • Added PHP_CodeSniffer with WordPress Coding Standards and ESLint for JavaScript to validate and ensure code quality.
Technologies: PHP, WordPress, WordPress Themes, React, PHP CodeSniffer, ESLint, GitHub, HTML, CSS, SCSS, Advanced Custom Fields (ACF), PHPUnit

WordPress Developer (via Toptal)

2020 - 2021
  • Built a custom WordPress theme from scratch with Vimeo API integration for videos, managed content restriction for users, and integrated with Stripe API for subscriptions.
  • Developed another custom WordPress theme from scratch for a podcast website, with a custom solution to import podcasts and episodes from Megaphone to the website.
  • Set up a web server solution on DigitalOcean, installed SSL certificates, and set up WordPress instances.
Technologies: WordPress, WordPress Themes, WordPress Plugins, Vimeo API, Stripe API, DigitalOcean, HubSpot, Bootstrap, GitLab

Web Developer

2019 - 2020
  • Developed custom WordPress themes and plugins from scratch.
  • Contributed to the front-end development using BootStrap and jQuery.
  • Collaborated with an independent creative agency, Versal Studio, to update, change, or rescue WordPress projects.
Technologies: Git, DigitalOcean, LAMP, jQuery, JavaScript, Bootstrap, CSS, HTML, WordPress, PHP

Web Developer

2018 - 2019
SimplyPHP Inc
  • Worked as a PHP back-end developer with the Laravel framework.
  • Contributed to several WordPress projects. Built plugins and themes from scratch.
  • Created custom HTML templates from PSD files using Bootstrap and jQuery.
Technologies: Git, Bootstrap, jQuery, JavaScript, CSS, HTML, WordPress, Laravel, PHP

IT Team Leader

2013 - 2018
Cuba Education Tours
  • Managed the IT team. Helped with building and expanding the development team.
  • Helped other developers to succeed in their daily tasks and worked as a developer.
  • Helped direct, build, and engineer most of the company’s projects.
  • Developed custom WordPress themes and plugins for a multisite.
  • Optimized the performance of a WordPress multisite.
  • Helped with the Linux server maintenance (cPanel and WHM).
Technologies: Git, Web Host Manager (WHM), Bootstrap, jQuery, JavaScript, CSS, HTML, MySQL, WordPress, PHP

Web Developer

2010 - 2013
  • Architected several WordPress sites working very closely with designers.
  • Developed custom WordPress themes and plugins from scratch.
  • Contributed to the creation of custom HTML templates from Photoshop files.
Technologies: jQuery, JavaScript, CSS, HTML, WordPress, PHP

Multisite WordPress Platform
A WordPress multisite built for a travel agency with a unique custom-made theme and plugins.

I was the team lead and senior developer, and working closely with the team, we were able to build a platform that allows the agency to create, promote, and sell their tours across their multisite. It also helps them follow every step of their clients to bring them the best experience in the process.

Website for a Montreal Real Estate Agency

A WordPress website is built with a custom-made theme with a unique design provided by the client.

The website is also integrated with the provider of their listings (Centris) which allows them to get automatically daily updates of their properties, reducing the administration work considerably.

I was the front-end and back-end developer for this project.

The Joshua Network

A WordPress website for audio and visual content, with a custom WordPress theme built from scratch, the option to import podcasts from Megaphone.
I was the full-stack developer and in charge of the server environment set up on DigitalOcean.
2002 - 2008

Bachelor's Degree in Computer Science

University of Havana - Havana, Cuba


jQuery,, Stripe API, Vimeo API, React, PHP CodeSniffer, WordPress API


GitLab, PhpStorm, Git, GitHub, Advanced Custom Fields (ACF), CircleCI, Jira


WordPress, Mailgun, MacOS, Ubuntu, LAMP, DigitalOcean, HubSpot, WordPress VIP, Docker






Bootstrap, Laravel, PHPUnit, Tailwind CSS


WordPress Themes, WordPress Plugins, WordPress Installation, Web Host Manager (WHM), ESLint, WordPress Multisite, Technical Architecture

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