Himad Mouhtar, Developer in Madrid, Spain
Himad is available for hire
Hire Himad

Himad Mouhtar

Bio

Himad is a results-driven, accomplished, bilingual full-stack developer highly regarded for developing applications and sites that exceed corporate and client requirements. He has superb analytical skills, with the ability to solve challenging problems using industry standards and cutting-edge technologies, delivering clean, well-structured code. Himad is equipped with the skills to work collaboratively with clients to understand requirements and deliver quality products on time.

Portfolio

Toptal Clients
PHP, JavaScript, WordPress, Advanced Custom Fields (ACF), WooCommerce...
Syde GmbH
WordPress, WooCommerce, Payment APIs, WordPress Themes
SaasAlerts
Firebase, Node.js, Cloud

Experience

  • WooCommerce - 7 years
  • WordPress - 7 years
  • PHP - 3 years
  • WordPress API - 3 years
  • WordPress Plugins - 3 years
  • JavaScript - 3 years
  • Advanced Custom Fields (ACF) - 2 years
  • PHPUnit - 2 years

Preferred Environment

WordPress, React, PHP, WooCommerce, LearnDash, LearnPress, WordPress VIP, WordPress Plugins, Gravity Forms, MemberPress

The most amazing...

...experience I've had was giving a TEDx talk on how software is changing our lives and the ethical problems we might face with the implementation of AI.

Work Experience

Senior WordPress Engineer

2020 - PRESENT
Toptal Clients
  • Provided leadership and direction to teams of varying sizes in the development and improvement of WordPress sites with significant traffic and custom requirements.
  • Implemented enhancements and optimizations to WooCommerce websites with thousands of products to address performance issues.
  • Detected and resolved performance issues using tools like XDebug, New Relic, and Query Monitor.
  • Selected custom plugins and themes for clients, implementing strategies to extend the functionality of various plugins such as WooCommerce, LearnDash, MemberPress, Gravity Forms, Advanced Custom Fields (ACF), and others.
  • Delivered comprehensive WordPress training to clients and end users.
Technologies: PHP, JavaScript, WordPress, Advanced Custom Fields (ACF), WooCommerce, LearnDash, LearnPress, React, Angular, TypeScript, Membership Sites, Payment APIs, WordPress Themes

Senior WordPress Engineer

2022 - 2026
Syde GmbH
  • Contributed to the creation of payment gateways for enterprise clients like PayPal, Payoneer, Mollie, and others.
  • Led fraud investigations and implementation of prevention measures in the official PayPal Payments for WooCommerce plugin.
  • Built and maintained high-traffic WooCommerce websites for enterprise clients in specialized hosting platforms like WordPress VIP.
Technologies: WordPress, WooCommerce, Payment APIs, WordPress Themes

Senior Web Engineer

2021 - 2022
SaasAlerts
  • Led modernization of legacy application using DDD patterns, enabling auto-scaling on Google Cloud serverless infrastructure and improving response times by 40%.
  • Built a synchronization module managing 10+ million daily records across providers for an events observability system.
  • Improved CI/CD processes, reducing deployment time by 70%.
Technologies: Firebase, Node.js, Cloud

Full-stack Web Engineer

2019 - 2020
Alvea
  • Developed two WordPress plugins: Rekruit to manage recruitment operations and information about candidates and Timesheets to manage employees' worked hours, vacations, and performance.
  • Created an intranet for the company in WordPress, which uses Rekruit and Timesheets plugins to manage information about recruitment processes and employee performance.
  • Managed virtual private servers in DigitalOcean to host WordPress sites.
Technologies: SQL, Angular, JavaScript, PHP, WordPress Plugins, WordPress, Payment APIs

Experience

PayPal Payments for WooCommerce Plugin

https://wordpress.org/plugins/woocommerce-paypal-payments/
I worked for several years as one of the developers for the PayPal Payments for WooCommerce plugin, where I led fraud investigations and implemented prevention measures, implemented a new optimized UI using React, handled bug reports, and more.

MultilingualPress

https://multilingualpress.org/
I worked as one of the lead developers on MultilingualPress, one of the most popular multilingual plugins for WordPress. I helped implement an AI translations feature, modernize a large legacy codebase, handle bug reports, and manage overall maintenance and feature development for the plugin.

WordPress Engineer for a Kids E-learning Website

https://generationgenius.com
As the lead engineer at GenerationGenius, a prominent e-learning platform for school science in the US, I introduced new features to enhance the platform. Additionally, I developed a plan to systematically optimize and phase out legacy components of the WordPress site.

Senior WordPress Engineer for a US Healthcare Education Company (via Toptal)

https://mrionline.com/
MRI Online partners with proven educators to create the best training experiences for radiologists in every stage of their careers. I worked with a team of more than eight developers and helped diagnose and fix performance issues, created API endpoints, and did customizations on the back end.

Senior WordPress Engineer for a Nonprofit Website (via Toptal)

https://cotap.org
• Migrated from an unsupported theme, patched vulnerabilities, and removed the website from blocklists, ensuring safe user interaction and upholding reputation.
• Revamped the donation process flow, resulting in a noticeable increase in donations for Carbon Offsets To Alleviate Poverty (COTAP).
• Optimized the site's performance to achieve faster load times, reduced bounce rates, and enhanced user engagement, amplifying the nonprofit's impact

Oakworld (via Toptal)

https://oakworld.co.uk
Oakworld is a WooCommerce furniture store with 100,000+ products and tens of thousands of orders per year. While I worked with them, I helped them significantly improve the store's performance and introduced better practices to handle some of the background processes they had.

The Collective Rising (via Toptal)

The Collective Rising is a digital membership community that provides women with newfound access to discovery, recognition, and advancement opportunities.

ROLE
• Developed an advanced and highly customized MemberPress workflow, implementing Gravity Flow and Gravity Forms.
• Customized the behavior of the Mailchimp add-on for GForms by using hooks.
• Implemented Zapier, Google Sheets, and MemberPress callbacks based on user actions.
• Integrated Gitlab CI to push changes automatically to production and development environments in WPEngine.

TECHNOLOGIES: MemberPress, WordPress, PHP, jQuery, SASS, Gulp, Gitlab, CI

SearchTreatment (via Toptal)

SearchTreatment is a digital search portal that offers access to behavioral health services supporting providers and partners in their initiation of referrals through the development of referral management.

• Compliance with HIPAA laws was enforced during the development process
• Extended Gravity Forms and Advanced Custom Fields functionality with hooks
• Conducted general maintenance, solved performance issues, and built new pages
• Created an integration with Gravity Forms and a SQL Server database located in a remote server

TECHNOLOGIES: WordPress, PHP, SQL Server, Gravity Forms, ACF

Sparketh (via Toptal)

https://sparketh.com
Sparketh is a library of fun, online art video lessons for kids and teens 6 to 18-​year-olds. I helped them optimize their site, get rid of unnecessary plugins and custom code, and improve their security after several threads like carding attacks.

WordPress StackExchange Contributor

I've been an active contributor to the WordPress StackExchange, a forum where developers go to get answers on plugins, themes, and any problem related to WordPress. By providing helpful solutions to the community, I've become part of the top 2% contributors of the year.

Education

2016 - 2020

Bachelor's Degree in Computer Science

European University in Madrid - Madrid, Spain

Certifications

JANUARY 2026 - PRESENT

Advanced Professional WordPress Developer

Automattic

Skills

Libraries/APIs

jQuery, WordPress API, WooCommerce API, Web3.js, Stripe, Puppeteer, Backbone.js, Sage, BuddyPress, React, Node.js

Tools

LearnPress, Etherscan, WP-CLI, Advanced Custom Fields (ACF), LearnDash, Divi Builder 3, WPML, Gutenberg Editor, Zapier, Jira

Languages

JavaScript, PHP, SCSS, Solidity, HTML, CSS, SQL, TypeScript

Frameworks

Next.js, AngularJS, PHPUnit, Divi, Angular, Ionic, Laravel

Paradigms

Refactoring

Platforms

WordPress, WooCommerce, Ethereum, Blockchain, Vercel, Google Ads, WordPress VIP, Firebase

Storage

WP Engine

Other

WordPress Plugins, Elementor, Gravity Forms, Full-stack, Ethers.js, Membership Sites, Web Development, WordPress Themes, Payment APIs, MemberPress, Web Scraping, Malware Removal, WordPress Multisite, Beaver Builder, eCommerce, Contact Form 7, Visual Composer, Formidable, Content Marketing Platforms, Custom Themes, Computer Science, Software Analysis, Smart Contracts, Ethereum Smart Contracts, Cloud

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

1

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring