Gero is available for hire

Gero Nikolov

Verified Expert in Engineering

Full-stack WordPress Developer

Location

Sofia, Bulgaria

Toptal Member Since

August 20, 2020

Gero is a full-stack developer specializing in the WordPress environment. His career as a web developer and solutions architect began in 2016 when he built eCommerce and media solutions. His expertise soon expanded into developing online casino solutions from A to Z, with custom-developed gamification platforms and proven customer satisfaction. Gero's newest frontier is developing products in the fintech sector. He excels as a valued team member and an inspirational team leader.

WordPress Design Full-stack Development WordPress Plugins Software Software Development Ajax WordPress Themes Full-stack WordPress Optimization User Interface (UI)Responsive UI Web Development Front-end Back-end WordPress Phalcon Atom

Portfolio

Causemetric LLC

PHP, WordPress, WordPress Plugins, REST APIs, JavaScript, MySQL, CSS3, HTML5...

Flirt Marketing Inc

WordPress, WooCommerce, HTML, CSS, WordPress Themes, Bug Fixes...

Lightricks US Inc

WordPress, ACF PRO, REST, REST APIs, Jira, Salesforce, PHP, JavaScript, MySQL...

Experience

WordPress - 8 years REST - 6 years WordPress Optimization - 6 years Full-stack - 6 years MySQL - 6 years PHP - 6 years JavaScript - 6 years WordPress Plugins - 6 years

Availability

Part-time

Preferred Environment

MySQL, JavaScript, PHP, WordPress Plugins, WordPress API, WordPress, WordPress Themes, REST, REST APIs

The most amazing...

...fintech products I created were for Credissimo. They boosted loan requests to the company, surpassing 800,000.

Work Experience

PHP WordPress Plugin Developer

2023 - PRESENT

Causemetric LLC

Integrated multiple WordPress plugins into a single, streamlined core using the existing system and a custom autoloader.
Provided comprehensive support across various web needs, including WordPress, ensuring all requirements were met.
Created a cutting-edge v3 consolidation core that seamlessly combines products into a well-organized modular system, easily managed as a WordPress plugin.

Technologies: PHP, WordPress, WordPress Plugins, REST APIs, JavaScript, MySQL, CSS3, HTML5, ECMAScript (ES6), Responsive UI, ACF PRO, Search Engine Optimization (SEO), Bug Fixes, API Integration, WordPress Design, Database Architecture, Full-stack Development, Landing Pages, B2B, Performance Optimization

WordPress Developer

2024 - 2024

Flirt Marketing Inc

Provided thorough reviews, analysis, and recommended tailored solutions and future enhancements for the client's system.
Ensured seamless communication and coordination with our Support team, ensuring prompt access to vital information when needed.
Achieved all objectives within 80% of the planned time, saving costs by an extra 20%.

Technologies: WordPress, WooCommerce, HTML, CSS, WordPress Themes, Bug Fixes, WordPress Plugins, Database Architecture, Full-stack Development, B2B

WordPress Developer

2023 - 2024

Lightricks US Inc

Led PopularPays' rebranding, boosting their market presence through strategic collaboration and team leadership.
Created a tailored WordPress page builder for PopularPays, enhancing their digital platform for improved customer engagement.
Supported PopularPays' shift to Webflow on the client's decision, optimizing web processes and compiling a knowledge drive for continued excellence.

Technologies: WordPress, ACF PRO, REST, REST APIs, Jira, Salesforce, PHP, JavaScript, MySQL, SCSS, CSS, HTML, Yoast SEO, Management, Team Management, WordPress Design, Database Architecture, Full-stack Development, Landing Pages, B2B, SEO Tools

WordPress Developer (via Toptal)

2022 - 2023

YesChef Ltd

Designed a seamless migration process for transferring legacy subscriptions to their new setup, demonstrating my dedication to delivering efficient solutions.
Incorporated robotic process automation (RPA) scripts into their advanced WordPress setup, improving data collection and streamlining testing processes to boost efficiency.
Integrated Elementor Core modules into their fast WordPress setup, enhancing website performance and user experience to drive better results.

Technologies: PHP, WordPress, Stripe, WooCommerce, JavaScript, CSS, WooCommerce API, WordPress Plugins, Stripe API, Responsive UI, ACF PRO, Search Engine Optimization (SEO), Bug Fixes, API Integration, Membership Sites, Database Architecture, Full-stack Development, Landing Pages, B2B, SEO Tools, Performance Optimization

WordPress Expert

2022 - 2022

Institute of Advanced Research in Artificial Intelligence (IARAI)

Oversaw a successful launch, resulting in over 100 active data submissions within the challenge period, showcasing my strong leadership during key project stages.
Improved the legacy back-end architecture continuously in real-time, ensuring optimal performance with each enhancement.
Supported the team throughout their challenge season, showing dedication to our collective success through collaborative problem-solving.

Technologies: WordPress, WordPress Plugins, WordPress Themes, WordPress Design, User Interface (UI), PHP 7, Subscriptions, Full-stack, WordPress Optimization, REST, PHP, Elementor, User Experience (UX), Responsive UI, ACF PRO, Bug Fixes, API Integration, Database Architecture, Full-stack Development, Landing Pages, B2B

Web Development Team Lead

2020 - 2022

Credissimo

Spearheaded numerous deployments during the winter, the busiest season, ensuring our company's continuous success and efficiency.
Developed and launched over 50 projects in the final quarter of the year, driving significant growth and innovation.
Guided a diverse team of five full-stack developers, each at different stages in their careers, fostering a rich collaborative environment.
Advanced two mid-level developers to senior roles, recognizing their growth and contributions.

Technologies: Bootstrap 3, Zeppelin, Bootstrap, Remote Team Leadership, Team Leadership, SCSS, Back-end, Front-end, PhalconPHP, MySQL, PHP, HTML, CSS, Ajax, Agile, Project Management, Technical Leadership, Google Analytics, Google Tag Manager, Site Speed Optimization, User Interface (UI), React, SQL, ECMAScript (ES6), Object-oriented Programming (OOP), Adobe Experience Design (XD), PHP 7, Subscriptions, Full-stack, jQuery UI, REST, Linux, Business Psychology, User Experience (UX), Responsive UI, Search Engine Optimization (SEO), Bug Fixes, API Integration, Membership Sites, Database Architecture, Full-stack Development, Landing Pages, SEO Tools, Performance Optimization

Modern WordPress Developer

2021 - 2021

JS Operating Company LP

Integrated the Jazz HR Recruitment API, enhancing the recruitment process.
Collaborated closely with the client's development team to identify and solve challenges within their existing project.
Maintained close ties with the team, organizing meetings and leading the Recruitment project throughout the development.

Technologies: JavaScript, WordPress, PHP, React, ACF PRO, REST, REST APIs, SCSS, Bootstrap 4, WordPress API, WordPress Themes, WordPress Plugins, HTML, CSS, MySQL, API Integration, Adobe Photoshop, Database Architecture, Full-stack Development, Landing Pages, B2B, Performance Optimization

Senior Full-stack Developer

2019 - 2020

Credissimo

Created fintech products, such as quick loan websites, which significantly boosted loan requests to the company, surpassing 800,000.
Directed multiple product launches and led creative brainstorming sessions for upgrades with our team of front-end developers and designers.
Acted as the team leader and senior full-stack web developer and guaranteed efficient project management for fast-processing lending websites.

Technologies: Bootstrap, Zeppelin, Back-end, Front-end, Full-stack, CSS3, HTML5, APIs, Sass, Software, WordPress API, Web Development, Google Maps, Team Leadership, GitLab, Git, REST APIs, Ajax, REST, HTML, CSS, SCSS, MySQL, PhalconPHP, PHP, jQuery, JavaScript, Google Analytics, Google Tag Manager, Site Speed Optimization, User Interface (UI), SQL, ECMAScript (ES6), Object-oriented Programming (OOP), Adobe Experience Design (XD), PHP 7, Subscriptions, jQuery UI, Linux, User Experience (UX), Responsive UI, ACF PRO, Search Engine Optimization (SEO), Bug Fixes, API Integration, Adobe Photoshop, Membership Sites, Database Architecture, Full-stack Development, Landing Pages, SEO Tools, Performance Optimization

Senior Full-stack WordPress Developer | R&D Manager

2017 - 2019

Polarica

Crafted the back-end and front-end architecture, designed unique gamification features, and developed BI tools for four online casino brands, achieving a user satisfaction rating of 9.5/10 for each.
Developed bespoke business intelligence tools to monitor player stats and satisfaction, enhancing client communication and managing promotions effectively.
Collaborated with C-level executives to reality-check and adjust the company's vision, business goals, and growth decisions.
Led a team of ten, including five remote members in Israel, fostering collaboration and productivity across borders.
Oversaw interviews and hiring processes for five developers, enriching our team with talented individuals.

Technologies: WordPress Optimization, Zeppelin, Back-end, Front-end, Full-stack, CSS3, HTML5, APIs, Sass, Software, WordPress API, Web Development, Google Maps, Remote Team Leadership, Team Leadership, Bitbucket, GitLab, GitHub, Git, Advanced Custom Fields (ACF), WordPress Themes, WordPress Plugins, REST APIs, Ajax, REST, MySQL, CSS, HTML, SCSS, jQuery, JavaScript, WordPress, Project Management, Technical Leadership, WordPress Design, User Interface (UI), SQL, Affiliate Programs, Affiliate Marketing, Object-oriented Programming (OOP), WooCommerce, WooCommerce API, Stripe API, PHP 7, Subscriptions, BrainTree, Braintree API, Braintree SDK, Elementor, User Experience (UX), Responsive UI, ACF PRO, Search Engine Optimization (SEO), Bug Fixes, API Integration, Adobe Photoshop, Membership Sites, Database Architecture, Full-stack Development, Landing Pages

Senior WordPress Developer

2015 - 2016

DevriX

Developed WordPress eCommerce sites for three clients, with one site quickly attracting over 85,000 active product users post-launch.
Tracked and resolved project issues, utilizing Asana for seamless task management.
Led a remote team of developers and marketers to achieve outstanding solutions and results for our clients.
Created responsive, full-stack websites for four clients, including a web summit and a museum in the United States.

Technologies: Bootstrap, Publishing, WordPress Optimization, Stripe Payments, Stripe API, Back-end, Front-end, Full-stack, CSS3, HTML5, APIs, Sass, WordPress Themes, Software, WordPress API, Web Development, Google Maps, Remote Team Leadership, Team Leadership, Bitbucket, GitHub, Git, Advanced Custom Fields (ACF), WooCommerce API, WooCommerce, REST APIs, REST, Ajax, MySQL, HTML, CSS, SCSS, jQuery, JavaScript, WordPress, PHP, WordPress Design, User Interface (UI), SQL, Object-oriented Programming (OOP), PHP 7, Subscriptions, Elementor, User Experience (UX), Responsive UI, ACF PRO, Search Engine Optimization (SEO), Bug Fixes, API Integration, Adobe Photoshop, Database Architecture, Full-stack Development, Landing Pages

Experience

WordPress Plugin | Instant Breaking News

https://wordpress.org/plugins/instant-breaking-news/

Instant Breaking News (IBN) is a free WordPress plugin that enables the "Breaking News" functionality on your website in just three simple clicks. It automatically converts your visitors' time zones to your website host (server) time in order to show only the latest and most relevant news to your website visitors. The plugin has 70+ active installations and an overall rating of 5 out of 5.

WordPress Plugin | Infinite Scroll Random Post

https://wordpress.org/plugins/infinite-scroll-random-post/

Infinite Scroll Random Post (ISRP) is a free WordPress plugin that enables infinite lazy scrolling on each post on your website. The plugin loads a randomly selected blog post at the end of the previously loaded post. It is currently designed to work with every WordPress-based theme.

WordPress Plugin | Chrissy

https://wordpress.org/plugins/chrissy/

Chrissy makes your website more interactive! She provides your visitors with the ability to just mention the name of the page they want to visit from the menu, and she’ll bring them there; for example, "Go to blog." Using the Google speech recognition API to catch the precise voice input, Chrissy is the first voice-driven navigator in the WordPress world! Of course, she knows that not all browsers support the speech recognition API, so she reveals herself only to visitors who are using Chrome and Chrome on Android.

WordPress Plugin | WP Base Translate

https://wordpress.org/plugins/wp-base-translate/

This plugin allows you to create a multilingual website in just a few clicks! As simple as it sounds, WP Base Translate lets you to easily and dynamically add, edit, or remove languages from your website. The plugin has 30+ active installations.

WordPress Plugin | Promotator

https://wordpress.org/plugins/promotator/

The Promotator plugin simplifies your daily email marketing life with its global sending abilities! Using this plugin allows you to select an email template and the blog posts you want to market directly through your WordPress Dashboard. Then, all you need to do is send your email, also directly from your WordPress Dashboard.

WordPress Plugin | Checkin

https://wordpress.org/plugins/checkin/

The Checkin plugin allows you to share your trips with your readers. Based on the Foursquare and Swarm APIs, it can easily make your blog more interesting by adding your favorite places in your stories.

WordPress Plugin | AINOW

https://wordpress.org/plugins/ainow/

Artificial Intelligence Now (AINOW) is here to help you in the following situation:

You are writing amazing stories on different themes from the everyday world. But, after a while, there are so many stories that your readers have lost their way to find stories that interest them. Some of them even messaged you about your storyline getting harder and harder to read. In comes the power of the AINOW plugin and machine learning, suggesting the posts that are most relevant to their interests.

WordPress Plugin | BLuR

https://wordpress.org/plugins/blur/

Blue Light Remover (BLuR) takes care of the harmful blue light coming from the screens on your readers' devices. It automatically detects the time where your visitors are and prepares the correct color filter to improve their reading experience.

WordPress Plugin | Fancy User List

https://wordpress.org/plugins/fancy-user-listing/

Fancy User List (FUL) lets you list any of your registered users to any of your posts or pages. FUL registers one simple shortcode on your listing setup page, which you can use on the posts or pages that best fit your users. The plugin has 40+ active installations.

WordPress Plugin | List Media

https://wordpress.org/plugins/list-media/

The List Media plugin allows you to list all (or part) of your media posts on a custom page or post. Using this simple shortcode [list_media], you can create a file archive or gallery grid page with just one click. The plugin has 30+ active installations.

WordPress Plugin | CPT Lister

https://wordpress.org/plugins/custom-post-type-lister-cpt-lister/

Custom Post Type (CPT) Lister lets you list any of the registered post types on a specific post or page. Using this simple shortcode [cpt_show], you can create a detailed archive page for each of the available post types everywhere you choose! The plugin has 30+ active installations and an overall rating of 5 out of 5.

WordCamp Utrecht | Speaker

I developed and proposed an innovative idea about the WordPress burnout problem among developers and how to solve it. My proposal was accepted, and I co-presented WordCamp sessions that helped participants better understand what burnout is and why it's happening. It was a great opportunity to spread the word about a problem that's widespread today but wasn't very common at that time.

Skills

Languages

PHP, JavaScript, SCSS, CSS, HTML, Sass, HTML5, CSS3, SQL, ECMAScript (ES6), PHP 7

Frameworks

Bootstrap, React Native, PhalconPHP, Bootstrap 3

Libraries/APIs

WordPress API, jQuery, jQuery UI, REST APIs, WooCommerce API, Google Maps, Stripe API, Braintree API, React, Stripe

Tools

Atom, Advanced Custom Fields (ACF), Git, ACF PRO, GitHub, GitLab, Bitbucket, Adobe Experience Design (XD), Figma, Adobe Photoshop, Braintree SDK, Google Analytics, Jira

Paradigms

Agile, REST, Object-oriented Programming (OOP), B2B, Search Engine Optimization (SEO), Management

Platforms

WordPress, Visual Studio Code (VS Code), Windows, Linux, MacOS, WooCommerce, Zeppelin, Salesforce

Storage

MySQL, Database Architecture

Industry Expertise

Project Management

Other

WordPress Plugins, Software, Software QA, Software Development, Software Development Management, Software Modeling, Ajax, WordPress Themes, Web Development, APIs, Full-stack, Front-end, Back-end, WordPress Optimization, WordPress Design, User Interface (UI), Responsive UI, Bug Fixes, API Integration, Full-stack Development, Landing Pages, Performance Optimization, UI Development, Brand Development, Brand Design, Team Leadership, Remote Team Leadership, Cross-functional Team Leadership, Business Psychology, Stripe Payments, BrainTree, Publishing, Technical Leadership, Site Speed Optimization, Affiliate Programs, Affiliate Marketing, Subscriptions, Elementor, User Experience (UX), Membership Sites, SEO Tools, Google Tag Manager, Bootstrap 4, Yoast SEO, Team Management

Education

2012 - 2016

Bachelor's Degree in Computer Science and System Programming

Technological School Electronic Systems (TUES) - Sofia, Bulgaria

Collaboration That Works

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