Haris Kaklamanos, Developer in Patra, Greece
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Haris Kaklamanos

Verified Expert  in Engineering

Web Developer

Patra, Greece
Toptal Member Since
April 24, 2020

Haris is a full-stack web developer with more than 14 years of professional experience—building a variety of websites and apps using a range of technologies. For the past eight years, he's focused on developing custom themes, plugins, and integrations for corporate, eCommerce, and membership WordPress websites. Haris enjoys working with multidisciplinary teams and always tries to solve problems with simple, effective solutions.


Praxis CETraining, Inc.
WordPress, WordPress API, PSD to WordPress, JavaScript, PHP, MySQL, MariaDB...
WordPress, WordPress API, GetResponse, PHP, JavaScript, MySQL, Algolia...
Course Concierge
Sass, Gulp, LAMP, CSS, MySQL, JavaScript, PHP, WordPress, WordPress Themes...




Preferred Environment

Basecamp, Trello, Bitbucket, SourceTree, Visual Studio Code (VS Code), SmartGit

The most amazing...

...app I have developed is a JavaScript-based screen reader for people with vision impairment.

Work Experience

Senior Web Developer

2020 - PRESENT
Praxis CETraining, Inc.
  • Led the technical foundation for the WordPress course platform.
  • Developed high-converting sales and email capture pages.
  • Built custom WordPress plugins to improve members' experience.
  • Leveraged WordPress and third-party APIs, extended the admin experience, and set up the foundation for performance tracking.
Technologies: WordPress, WordPress API, PSD to WordPress, JavaScript, PHP, MySQL, MariaDB, Cloudflare, ActiveCampaign, Google Tag Manager, Google Analytics, WooCommerce, AffiliateWP, Event Espresso, Easy Digital Downloads, LearnDash, Stripe, Stripe API, WordPress Themes, WordPress Plugins, Hosting

Senior Web Developer

2019 - 2022
  • Drove the strategy for the plugin's code and database optimization.
  • Built custom WordPress plugins to improve the front and back end experience.
  • Led the remote team, including a DevOps engineer and WordPress developer, working on all technological aspects, from infrastructure to front-end development.
  • Worked with the marketing lead to support and implement technical SEO and UI improvements.
Technologies: WordPress, WordPress API, GetResponse, PHP, JavaScript, MySQL, Algolia, Yoast SEO, SEO Tools, Ahrefs, Mailgun, PageSpeed, WordPress Themes, WordPress Plugins

Full-stack WordPress Developer

2017 - 2020
Course Concierge
  • Led the technical foundation for WordPress-based online course platforms.
  • Developed sales and email-capturing pages, including high-converting, pixel-perfect, and long-form, that were visited by thousands of people.
  • Built custom plugins to improve course members' experience based on each client's specific requirements.
  • Worked with the marketing team and led the technical foundation for performance tracking and GDPR compliance.
Technologies: Sass, Gulp, LAMP, CSS, MySQL, JavaScript, PHP, WordPress, WordPress Themes, WordPress Plugins, Hosting

Lead Developer

2008 - 2020
YES Internet
  • Drove the strategy and laid the foundation for a variety of web projects.
  • Faced client challenges with understanding and empathy.
  • Mentored the development team and provided code reviews.
  • Became the link between the client and the marketing experts.
Technologies: Gulp, CSS, MySQL, JavaScript, PHP, WooCommerce, WordPress, WordPress Themes, WordPress Plugins

Co-founder | Web Developer

2014 - 2017
  • Pitched the business idea to the EGG startup incubator and was awarded a one-year incubation program and mentorship.
  • Led the technical implementation of the micro-donations platform based on the Joomla Framework and Viva Payments, the leading Greek online payment gateway.
  • Worked with various NGOs to improve their digital performance during a period of economic and refugee crisis.
Technologies: CSS, HTML, JavaScript, MySQL, PHP

Learn, Practice, Play (via Course Concierge)

A WordPress online course website for Paul Davids: a guitarist, and creator of inspiring YouTube guitar channel with over 1 million subscribers. I developed the landing pages, the sales funnel and the membership website, including various custom plugins and API integrations that extended the course members' experience.

The Weekend Woodwoker (via Course Concierge)

A WordPress online course website for Steve Ramsey: host of the YouTube channel Woodworking for Mere Mortals, with over 1.5 million subscribers. I developed the landing pages, the sales funnel, and the membership website, including various custom plugins and API integrations that extended the course members' experience.

Aerochamber Official Greek Website (Freelance)

The official Greek website of Aerochamber, a world-class chamber for patients with breathing issues. I developed the website using WordPress as the content management system and Beaver Builder as the landing page creator.

Praksis NGO (Freelance)

The official website of Praksis, the biggest non-governmental organization for refugees and sensitive social groups in Greece. The website uses WordPress as its CMS and I developed a variety of plugins and API integrations, as well as a content migration script (Joomla Articles to WordPress Post Types).

Antivirus Radio (Volunteer Work)

Antivirus Radio aims to help people come closer during the coronavirus quarantine days. I converted the delivered mock to HTML and developed the website in GatsbyJS, a modern website and app generator for React.

The Parents Shop (Freelance)

A WordPress-based affiliate marketplace with curated new products that parents would love to have. I developed a custom WordPress theme based on Underscores, a starter theme made for WordPress. I also developed various custom eCommerce plugins and a two-way integration with the email marketing provider platform.

Daidalos Engineering

A WordPress-based corporate website for an architectural design and construction management agency. I converted the delivered design mock into a child theme and developed the landing pages using Beaver Builder.
2006 - 2008

Master's Degree in Engineering and Policy Analysis

Delft University of Technology - Delft, The Netherlands

1998 - 2004

Bachelor's Degree in Electrical and Computer Engineering

University of Patras - Patra, Greece


WordPress API, jQuery, WordPress REST API, Stripe, Stripe API


WPML, SmartGit, PageSpeed, AffiliateWP, Event Espresso, LearnDash, SourceTree, Basecamp, Trello, Adminer, PhpMyAdmin, Google Analytics, Git, Gulp, Bitbucket, Ahrefs


CSS, PHP, Sass, JavaScript, HTML, CSS3


Hosting, Management


WordPress, WooCommerce, Mailgun, LAMP, Algolia, Visual Studio Code (VS Code)




MariaDB, MySQL


Membership Sites, PSD to WordPress, Beaver Builder, Software Engineering, Easy Digital Downloads, WordPress Themes, WordPress Plugins, Content Marketing Platforms, Zeplin to HTML, Invision to HTML, ActiveCampaign, Cloudflare, GetResponse, Yoast SEO, SEO Tools, Google Tag Manager, Gatsby, Google Ads, Computer Engineering, Public Policy, Corporate Culture

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