Evgen is available for hire
Hire EvgenEvgen Gavrilov
Verified Expert in Engineering
Web Development Developer
Odessa, Odessa Oblast, Ukraine
Toptal member since April 7, 2015
Bio
Evgen is a senior full-stack developer with 14+ years specializing in WordPress and scalable architectures. He's led platform migrations from monolithic WordPress to a microservices-based SPA and is an expert in end-to-end delivery: requirements gathering, architecture, implementation, and team coordination. Evgen is an expert in integrations (Stripe and AI APIs), performance optimization (Redis and CDN), and technical SEO, and solves challenging problems and delivers production-ready solutions.
Portfolio
Iconic Market Research
Advanced Custom Fields (ACF), Ajax, WordPress, Figma to WordPress, Gemini API...
Toptal
JavaScript, HTML, WordPress, Advanced Custom Fields (ACF), Ajax, Asana, CSS3...
Radical Solutions, Inc.
PHP, WordPress, WooCommerce, JavaScript, Stripe, React, NestJS, Next.js...
Experience
- Web Development - 14 years
- WordPress - 14 years
- WooCommerce - 10 years
- WordPress Themes - 9 years
- WordPress Plugins - 7 years
- WordPress API - 6 years
- Technical SEO - 3 years
- AI Integration - 1 year
Preferred Environment
PHP, WordPress
The most amazing...
...work I've done is building a scalable WordPress-to-React SPA architecture serving 160,000+ users with a microservices back end.
Work Experience
Technical Lead and Full-stack Developer
2025 - PRESENT
Iconic Market Research
- Handled full-stack website development, maintenance, and technical SEO.
- Developed an AI-powered search feature using the Gemini API.
- Delivered WordPress development with a custom-built theme, including theme architecture, layout implementation, performance optimization, and integration with plugins and back-end logic to meet project requirements.
Technologies: Advanced Custom Fields (ACF), Ajax, WordPress, Figma to WordPress, Gemini API, Technical SEO, AI Integration, User Interface (UI), User Experience (UX)
Web Developer
2015 - PRESENT
Toptal
- Conducted direct client engagement and full project lifecycle management in the Toptal Network.
- Led end-to-end project delivery, including requirements gathering, technical implementation, and client communication.
- Delivered WordPress development, including custom themes, plugins, and complex integrations with Google Maps, HubSpot, Mailjet, GetDrip, Capsule CRM, the YouTube API, etc.
- Contributed to performance optimization efforts through custom caching solutions.
Technologies: JavaScript, HTML, WordPress, Advanced Custom Fields (ACF), Ajax, Asana, CSS3, APIs, PSD to HTML, WordPress Plugins, Git, YouTube API, Jira, MySQL, jQuery UI, Google Maps API, Facebook SDK, Zeplin, Trello, Animation, WordPress Themes, WordPress API, HTML to WordPress, WooCommerce, PHP, HubSpot API, Web Development, WooCommerce Subscriptions 2, Responsive, HubSpot CRM, GitHub, Figma, User Interface (UI), User Experience (UX)
Senior Web Developer
2017 - 2026
Radical Solutions, Inc.
- Led a WordPress-to-React SPA migration for 160,000+ users with a 20-person team at peak.
- Led an architecture transformation by converting WordPress into a REST API back end while maintaining legacy data.
- Improved performance through a custom Redis caching system, reducing critical endpoint response times from 10 seconds to 300–400 milliseconds; implemented lightweight endpoints using WordPress SHORTINIT to bypass full core loading; and enabled CDN delivery for static assets.
- Led an eCommerce overhaul, migrating from WooCommerce to the Stripe Billing Portal with a custom subscription management plugin.
- Developed microservices using NestJS and Next.js, including a real-time in-app notification system, an internal data collection and analysis service for the AI team, and a public API for the core product.
- Managed infrastructure components including JWT-based authentication, an AWS-to-Backblaze migration using a custom migration script, Redis, and Cloudflare.
- Developed integrations with Brevo for email automation and abandoned cart workflows, NeverBounce, the Coconut API, Stripe, and internal APIs.
- Technical SEO: backend/frontend optimizations for SPA, structured data, meta management, Prerender.io implementation;
- Led project management efforts, including cross-team coordination, requirements analysis, epic creation, and task distribution across microservices.
- Proposed proactive technical solutions, supported by research and clear implementation roadmaps.
Technologies: PHP, WordPress, WooCommerce, JavaScript, Stripe, React, NestJS, Next.js, PostgreSQL 9, WordPress API, Advanced Custom Fields (ACF), Ajax, APIs, Git, JSON Web Tokens (JWT), Backblaze B2, AWS SDK, Figma to WordPress, Authorization, Stripe API, Web Development, WooCommerce Subscriptions 2, Responsive, HubSpot API, Technical SEO, Search Engine Optimization (SEO), GitHub, Cloudflare, WooCommerce API, Payment APIs, PostgreSQL, Figma, User Interface (UI), User Experience (UX)
Implementor
2010 - 2015
PSD2HTML
- Created WordPress sites from scratch, from PSD, Figma, Zeplin to fully working WordPress sites.
- Developed WordPress, Joomla, Drupal, and Shopify themes.
- Taught young specialists to create custom WordPress themes.
- Ran estimates on new projects for WordPress, Joomla, Drupal, and Shopify future websites.
- Connected WordPress with different APIs like Google API, Google Analytics, YouTube, and CRM.
Technologies: Shopify, WordPress, JavaScript, CSS, HTML, PHP, PSD to HTML, WordPress Plugins, MySQL, jQuery UI, Google Maps API, Subversion (SVN), WordPress Themes, HTML to WordPress, WooCommerce, Web Development, WooCommerce Subscriptions 2, Responsive, User Interface (UI), User Experience (UX)
Experience
Ginni Media
https://www.ginnimedia.com/Responsive WordPress theme made from scratch. I built custom post types and custom and useful meta-boxes to organize a clear back end for the admin. Also, I created a custom form implementation based on the WYSIWYG text editor.
For Super Rich
https://www.forsuperrich.com/I've done the marketplace from scratch. The user can buy some advertising and add this listing to the site. Admin is able to set manage user ads.
Automations to change SEO title/SEO descriptions/SEO URLs and actual permalinks were implemented.
Automations to change SEO title/SEO descriptions/SEO URLs and actual permalinks were implemented.
WestwaterArts
http://westwaterarts.com/The website provides live multimedia performances for orchestras. Responsive and Retina compatibility theme for WordPress was developed from scratch using animation, image galleries, and SoundCloud integration.
RADiCAL Solutions
RADiCAL was founded to develop the world's most powerful computer vision technology focused on detecting and reconstructing 3D human motion from 2D content. It provides AI-powered 3D motion capture—in the cloud and on every device.
WordPress Developer for A Lead Generation Website
https://scentlinqpro.com/I created a fully responsive website based on the custom WordPress theme. On the website, I implemented Google Map API, HubSpot API, and Mailjet API and developed a custom cache plugin to improve the site's load.
Boring Quant | WordPress Developer
A membership subscription-based WordPress website. Responsiveness, visual animation, and effects were applied on the front end, including social login and reading custom JSON data to provide a current stock portfolio to the site membership based on a paid subscription.
Quiet Light Brokerage, Inc. | WordPress Developer
A custom WordPress theme developed from scratch. I worked on the theme from PSD to completely finish the responsive WordPress custom theme. I used jQuery, Ajax, the GetDrip API integration, and the Capsule CRM API integration.
Q4intelligence, LLC | WordPress Developer
https://growth.q4intel.com/A custom plugin for WordPress and an additional functionality for BodyBoss.
The HubSpot API to WordPress: Publishing posts from the HubSpot feed into WordPress and integrating other resource blogs with a particular HubSpot account.
The HubSpot API to HubSpot: Publishing posts from HubSpot feed into other HubSpot accounts and integrating other resource blogs with a particular HubSpot account.
The HubSpot API to WordPress: Publishing posts from the HubSpot feed into WordPress and integrating other resource blogs with a particular HubSpot account.
The HubSpot API to HubSpot: Publishing posts from HubSpot feed into other HubSpot accounts and integrating other resource blogs with a particular HubSpot account.
Experience Vinyl | WordPress Developer
A custom WordPress theme that I developed from scratch, from PSD to a responsive WordPress custom theme. I used jQuery, Ajax, WooCommerce,
WooCommerce Subscription, and the custom WooCommerce gift functionality.
WooCommerce Subscription, and the custom WooCommerce gift functionality.
Custom WooCommerce Checkout
https://pannell.com.au/checkout/A custom WooCommerce checkout with extended business logic and UI customization. The project includes deep modification of the default checkout flow and is focused on performance, scalability, and clean WordPress-compliant architecture.
Сheerily.co
The project involves Shopify theme updates and customization with a focus on maintaining compatibility with platform updates. It includes UI and UX improvements, Liquid template adjustments, and responsive layout fixes while preserving existing business logic.
Ferma Flooring
http://fermaflooring.com/A responsive WordPress theme developed from scratch with full cross-device compatibility. The project includes custom layout implementation, AJAX-based interactions, and integration with Google Maps API. Special attention was paid to performance, clean code structure, and seamless user experience across desktop and mobile devices.
Education
2005 - 2011
Specialist's Degree in System Analysis and Management
National Technical University "Kharkiv Polytechnic Institute" - Kharkiv, Ukraine
Skills
Libraries/APIs
WordPress API, WooCommerce API, jQuery, Stripe API, Stripe, YouTube API, jQuery UI, Facebook SDK, Google Maps API, HubSpot API, React
Tools
AWS SDK, Advanced Custom Fields (ACF), Zeplin, Git, Subversion (SVN), Jira, Trello, Asana, GitHub, Figma
Platforms
WordPress, WooCommerce, Shopify
Languages
CSS3, HTML5, CSS, HTML, PHP, JavaScript
Frameworks
JSON Web Tokens (JWT), NestJS, Next.js
Paradigms
Search Engine Optimization (SEO), Responsive
Storage
MySQL, Backblaze B2, PostgreSQL
Other
WordPress Plugins, WordPress Themes, HTML to WordPress, Web Development, Payment APIs, Ajax, PSD to HTML, Figma to WordPress, Technical SEO, Cloudflare, User Interface (UI), User Experience (UX), Animation, APIs, Paid Memberships Pro (PMPro), WooCommerce Subscriptions 2, PostgreSQL 9, Authorization, Gemini API, HubSpot CRM, AI Integration, Gemini
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