Sergey is available for hire

Sergey Fedus

Verified Expert in Engineering

Full-stack WordPress Developer

Uzhhorods'ka city council, Zakarpattia Oblast, Ukraine

Toptal member since April 21, 2020

Expertise

Front-end Back-end Developers WordPress Development CSS HTML5 PHP JavaScript MySQL Bootstrap jQuery Sass Tailwind CSS AJAX Jira

Bio

With over 12 years of hands-on experience, it's safe to say that Sergey is a seasoned full-stack WordPress developer. He's created PHP websites, CSS3/HTML5 templates, JavaScript/jQuery scripts, and numerous WordPress plugins and themes. Along with his technical expertise, Sergey also possesses robust organizational skills so he can successfully build projects and solve problems with minimal supervision while achieving high client satisfaction.

Portfolio

Freelance

Ajax, Back-end, Front-end, HTML, WordPress Optimization, CSS, jQuery, Bootstrap...

Norse

Ajax, Back-end, Front-end, MySQL, JavaScript, CSS, HTML, CSS3, HTML5, PHP...

NXC

Ajax, Front-end, Google Maps API, jQuery, CSS, Subversion (SVN), Jira, Git...

Experience

JavaScript - 12 years
HTML5 - 12 years
CSS3 - 12 years
PHP - 12 years
jQuery - 6 years
WordPress - 5 years
WordPress Plugins - 5 years
WordPress Themes - 3 years

Availability

Part-time

Preferred Environment

jQuery, WordPress, JavaScript, CSS3, HTML5, WordPress Themes, WordPress Plugins, Git, Jira, Slack, Skype, Linux, Windows

The most amazing...

...things I've developed were the 15 digital products sold online on the world's leading marketplace with 5-star customer feedback for code quality and support.

Work Experience

Full-stack WordPress Web Developer

2018 - PRESENT

Freelance

Solved and fixed complex issues for the customer's projects by tracking down causes.
Added new features for existing projects by improving their plugins and themes.
Developed plugins from scratch to extend website functionality.
Restored and closed backdoors for infected and hacked websites.

Technologies: Ajax, Back-end, Front-end, HTML, WordPress Optimization, CSS, jQuery, Bootstrap, Git, Node.js, WordPress, MySQL, PHP, JavaScript, HTML5, CSS3, APIs, Tailwind CSS

Full-stack Web Developer

2015 - 2017

Norse

Developed websites for famous brands, educational facilities, government agencies, charity organizations, hotels, and online stores; e.g., customers with high demands for quality and details.
Tracked and fixed bugs using Jira as a reporting tool providing customer support.
Worked with content-heavy and highly visited websites using Varnish HTTP accelerator.

Technologies: Ajax, Back-end, Front-end, MySQL, JavaScript, CSS, HTML, CSS3, HTML5, PHP, jQuery

Web Developer

2009 - 2014

NXC

Developed websites for famous brands, educational facilities, government agencies, charity organizations, hotels, and online stores; e.g., customers with high demands for quality and details.
Tracked and fixed bugs using Jira as a reporting tool providing customer support.
Worked with content-heavy and highly visited websites using Varnish HTTP accelerator.

Technologies: Ajax, Front-end, Google Maps API, jQuery, CSS, Subversion (SVN), Jira, Git, MySQL, Twig, Symfony, PHP, JavaScript, HTML

Web Developer

2007 - 2009

Internet Bureau

Created websites from scratch, including the front-end and back-end parts.
Developed a multi-website that had seven sub-websites managed by a single CMS.
Fixed bugs and made improvements on the existing projects.

Technologies: Front-end, CSS, PHP, JavaScript, HTML

Experience

WordPress Pricing Table Builder | a Responsive Pricing Plan Plugin for WordPress

https://wordpress.org/plugins/wppricing-builder-lite-responsive-pricing-table-builder/

The main goal was to create a competitive product that we could sell online. I created the entire product: front-end and back-end parts. The front-end part consists of 89 responsive designs where each design has 10-30 color schemes. The back-end part is a builder in WordPress to manage the content of designs. As a result, it's successfully sold online on the world's leading marketplace with 5-star positive customer reviews for code quality and customer support.

WordPress Theme Development for Consulting Website

https://polontech.com/

The goal was to develop a WordPress theme from scratch based on the existing website's provided design. I created the entire theme, including front-end and back-end parts, and implemented it into the existing content and structure. As a result, the website works very fast in all modern browsers and looks perfectly well on mobile devices. It's completely optimized for Google PageSpeed Insights by getting the highest score.

Education

2009 - 2011

Master's Degree in Information Systems and Technologies

Transcarpathian State University - Uzhhorod, Ukraine

2005 - 2009

Associate's Degree in Software Development

College of Natural Sciences and Humanities - Uzhhorod, Ukraine

Skills

Libraries/APIs

jQuery, Google Maps API, Chart.js, WordPress API, Node.js, WordPress REST API

Tools

ACF PRO, Figma, Advanced Custom Fields (ACF), Git, Jira, Gutenberg Editor, Gulp, Skype, Slack, Subversion (SVN), WPML

Languages

CSS, HTML, HTML5, CSS3, PHP, JavaScript, Sass, SCSS

Frameworks

Bootstrap, Tailwind CSS, Symfony, Twig

Platforms

WordPress, FreeBSD, HubSpot, Windows, Linux, WooCommerce

Storage

MySQL

Other

Pixel Perfect, Front-end, Back-end, WordPress Themes, WordPress Plugins, Multi-language Support, WordPress Optimization, Ajax, APIs, Information Systems, Software Development

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