Andrija Naglic, Developer in Zagreb, Croatia
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Andrija Naglic

Verified Expert  in Engineering

WordPress Developer

Zagreb, Croatia
Toptal Member Since
October 5, 2020

Andrija develops top-end systems that easily scale and keep more profits. He has accumulated over 20 years of experience in programming and more than ten years of experience in development around the WordPress ecosystem. Andrija's led teams for international groups in numerous projects, worked with clients of all sizes and industries, and delivered over $2 million in increased revenue along with $200,000 in cost savings in the past year alone, serving as a technology consultant.


A Major Online Freelance Agency
WordPress Themes, WordPress Plugins, APIs, Web Project Management, WordPress...
PHP, JavaScript, Performance, Performance Optimization, Custom Post Types...
Elite Marketing Pro, LLC
PHP, WordPress, Debugging, WordPress Optimization, CSS3 Animation...




Preferred Environment

PHP, MySQL, Git, WordPress

The most amazing...

...project I've worked on was as a senior WordPress developer and built a membership LMS affiliate system with 20.000+ daily active users.

Work Experience

Freelance Senior Expert WordPress Developer

2015 - PRESENT
A Major Online Freelance Agency
  • Worked more than 7,500 hours on hourly contracts and hundreds of contracts in general.
  • Earned a job success score of 100% during my time on the platform.
  • Named a top-rated freelancer shortly after the beginning and have maintained that status.
  • Earned a high satisfaction rate; 91% of past clients on that platform would recommend me to someone else.
  • Responded quickly (within a day) to 100% of invitations.
Technologies: WordPress Themes, WordPress Plugins, APIs, Web Project Management, WordPress, CSS3 Animation, Custom Post Types, User Interface (UI), User Experience (UX), Prototyping, Web Development, Web Design, Design


2020 - 2023
  • Founded Goon, a premium WordPress plugin that allows you to optimize your WordPress website by allowing you to selectively disable certain unneeded plugins on specific pages or during Ajax requests.
  • Created the websites with the most active plugins to benefit from this kind of optimization; for websites with 70+ active plugins, the page loading speed improvements were up to 90%.
  • Enabled page loading speed improvements due to the flaws found even in the well-known and widely used popular plugins; a shining example is a popular plugin for contact forms that is actively used on more than 1.5 million websites.
  • Observed the plugins that should be blocked on certain requests loading themselves and all of their resources on every page request, not only where they are needed.
  • Built Goon to make it possible to block entire plugins with some of their JavaScript and CSS resources if they are not needed.
Technologies: PHP, JavaScript, Performance, Performance Optimization, Custom Post Types, Web Development

Technical Consultant | Senior Lead Web Developer

2016 - 2020
Elite Marketing Pro, LLC
  • Implemented a major overhaul of the entire system the company was using. Delivered significant improvement in speed, stability, and security. The company didn't previously have quality insights into its metrics.
  • Enabled the company to become confident in their new system and expand further which convinced them to do a bigger investment into their IT resources. The company had around 10,000 daily active users.
  • Performed a second major overhaul and included a whole set of new features in the system which allowed the company to cut the costs on third-party services they were using till then. This investment saved them $200,000 annually.
  • Made contributions that enabled the company to grow further and increase its revenue by 35% in a year. They've reached over 28,000 daily active customers.
  • Improved and maintained a complex WordPress multisite system that eligible affiliates used as their daily marketing tool.
  • Developed a custom solution that allowed the sales floor to create and pay orders in WooCommerce in the name of the customer. The feature involved creating custom WooCommerce payment gateway and advanced custom usage of Stripe API.
  • Created a custom solution that splits a single order into a multi-pay order which allowed the sales floor to split the payment across multiple customers' credit cards from Stripe. One of the split payments could be a PayPal invoice.
Technologies: PHP, WordPress, Debugging, WordPress Optimization, CSS3 Animation, Custom Post Types, Animation, User Interface (UI), User Experience (UX), Prototyping, Web Development, Web Design, Design

Chief Technical Officer

2012 - 2014
Exemplar Division
  • Co-developed 1,000+ niche mobile web apps that earned money through advertising through AdMob.
  • Developed several local apps on Facebook with small-to-medium impact.
  • Developed multiple projects on the Arduino platform that the company experimented with at the time.
Technologies: Google AdMob, PHP, WordPress, Web Development, Design

Senior Full-stack Developer

2009 - 2013
Exemplar Studio
  • Co-founded the company with the previous employer and started doing more complicated websites and web apps.
  • Developed a CRM system for a medium-sized national company in the food industry that allowed them to cut their costs in the accounting department by 80%.
  • Launched a tool for an existing international MLM company that involved a multi-level affiliate system with an advanced sales funnel which allowed its members to significantly cut their business costs and operate at a whole different scale.
  • Developed an ERP/CRM system for a Canadian company providing wholesale products across multiple industries for Canadian Federal, Provincial, and Municipal Government Agencies.
Technologies: WordPress, Web Development, Design

Lead Web Developer

2004 - 2010
Tatya Design
  • Deployed countless simple "About Us" company websites, mostly for local clients; it was a great period to learn ins and outs of HTML and CSS and commit to front-end development.
  • Led a team of freelancers and mastered the team communication.
  • Learned to understand clients' needs through communication with hundreds of clients during that period.
Technologies: CSS, HTML, PHP, Web Development

Data Scientist

1999 - 2004
Kermit, A Company for Intellectual Services
  • Developed the first commercially successful software applications.
  • Learned the tricks of the trade from a veteran database architect.
  • Developed a full software system for the video rental shop.
  • Co-authored a complete accounting software for SME businesses.
Technologies: SQL, Clarion, dBASE LMS and eCommerce Affiliate System with a Fully Integrated ERP and CRM
On this project, I worked as a lead web developer in a small international team. is a membership LMS affiliate system with fully integrated ERP and CRM systems and eCommerce. It's a successor of another project, that was built by me alone.

Both systems currently handle or did handle over 20,000 daily active users. LMS Affiliate System
I worked as a senior web developer for this project that consisted of a membership LMS affiliate system with 20.000+ daily active users.

The Whole Setup Included:
• A Core PHP site:
• A WordPress site:
• A service that was offered only to selected customers: a WordPress multisite system called

My First WordPress Project in 2010*/
It was an affiliate eCommerce multilingual website. It has quite a set of features that one would choose as a starting project in a new CMS environment.

Sadly, the company no longer operates at the scope they were at the time, but luckily—an archived version of the website can still be found at the link.


Mensa International, the High IQ Society


jQuery, WordPress API, WooCommerce API, Stripe API, Stripe, Google Drive API, REST APIs, PayPal API, BuddyPress


LearnDash, AffiliateWP, Advanced Custom Fields (ACF), Git, Grunt, NPM, Slider Revolution, WPBakery, Zapier


PHP, JavaScript, HTML, CSS, HTML5, Sass, dBASE, Clarion, SQL


Functional Programming, Object-oriented Programming (OOP), Database Design, RESTful Development


WordPress, WooCommerce, KISSmetrics, Ontraport, GoHighLevel

Industry Expertise

Web Design




MemberPress, APIs, WordPress Plugins, WordPress Themes, WordPress Design, Front-end, eCommerce, Gravity Forms, Full-stack, Debugging, WordPress Optimization, PayPal, Performance, Performance Optimization, Custom Post Types, Prototyping, Web Development, Web Project Management, ActiveCampaign, Drip Email, Membership Sites, Learning Management Systems (LMS), CRM APIs, Webhooks, Sales Funnel, Google Tag Manager, WordPress Multisite, User Interface (UI), User Experience (UX), Payment APIs, CSS3 Animation, Animation, Design, WordPress to PDF, Google AdMob, Nonprofits

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