FullStack Development
HTML, CSS, SASS, Javascript, jQuery, React, Next.js, React Native, Apollo, GraphQL, Remix, Node.js, Typescript, REST API, OpenAI API, PostgreSQL...
Shopify Development
Liquid, Theme Development, App Development (React), Hydrogen, Pagespeed Optimization, Custom features, Headless CMS, Shopify API.
CMS Development
WordPress, Squarespace, Shopify, Wix, Magento, OpenCart, InstaPage, Clickfunnels, Thinkific...
Consulting & SEO Audit
Screaming Frog, Woorank, Raventools, Semrush, Moz, WebCEO, Google Analytics, ChartBeat, CrazyEgg.
Senior Shopify Development Team Lead
SecondShop, Calgary, Alberta, Canada
May, 2024 — May, 2025
Led a team of senior Shopify developers to deliver enterprise-level e-commerce solutions. Specialized in Shopify Plus implementations, custom app development, and performance optimization for high-traffic stores serving millions of customers.
CEO, Founder
Codersy, Remote
Dec, 2022 — Present
Founded and leading Codersy, a specialized Shopify and full-stack development agency. Building high-performance e-commerce solutions, custom applications, and digital products for clients worldwide. Managing a team of expert developers while maintaining hands-on involvement in complex projects and architectural decisions.
Lead Developer
Marketplace Solutions, Remote
Dec, 2022 — Aug, 2023
Led development team in building and launching three successful Shopify themes for the official Shopify Theme Store. Architected scalable, performance-optimized solutions with modern development practices, achieving high conversion rates and excellent user experience metrics.
Fullstack Shopify Developer
Storetasker, Remote
Sep, 2022 — Present
Working as a hand-selected expert developer with Storetasker, connecting with top Shopify brands globally. Part of an elite network that has matched over 30,000 Shopify brands with highly skilled developers, designers, and consultants. Delivering full-stack Shopify solutions for enterprise clients.
Co-Founder, CTO
EasyPass, Belgrade
Mar, 2021 — Present
Co-founded innovative fintech startup and architected comprehensive technology stack. Built scalable applications using Next.js, React, and React Native, serving thousands of users. Led cross-functional development teams and established engineering best practices for rapid product iteration.
Frontend & Shopify Engineer
Henkel AG & Co., Berlin
Nov, 2020 — April, 2021
Developed enterprise-level headless commerce solutions for major consumer brands. Built high-performance React/Next.js applications integrated with Shopify's GraphQL API, delivering exceptional user experiences and significant conversion improvements for Fortune 500 clients.
Frontend & Shopify Engineer
MVP Factory, Berlin, Germany
June, 2020 — Sep, 2022
Delivered full-stack solutions for diverse client portfolio as independent contractor. Specialized in React/Next.js frontend development and comprehensive Shopify ecosystem projects including custom apps, theme development, and headless commerce implementations.
Front End & WordPress & Shopify Developer
Upwork, Remote
Mar, 2015 — Present
Started my entrepreneurial journey on Upwork, growing from junior developer to Top Rated Plus freelancer. Completed 300+ successful projects across diverse industries, building expertise in full-stack development, e-commerce, and client relationship management. This foundation launched my career and established my reputation in the global development community. You can check out my profile here.
Shopify Experts Certification
Shopify
Jan, 2019 — May, 2019
Earned certifications as a Shopify Partner in Theme Development, App Development
Electrical Engineering
Belgrade University
Oct, 2017 — Nov, 2020
IT & Programming
High School for Electrical Engineering "Nikola Tesla"
Sep, 2013 — June, 2017
Nav Lalji
CEO @ Hookah Hutt
"In the 8 years I've been using Upwork... I have never had more pleasure working with a freelancer than I did with Mladen. I found him to be intelligent, patient, skilled and an overall nice guy to work with. He made the entire process of customizing our Shopify store smooth, easy and with minimum hiccups.
10 out of 10, highly recommend you work with him!"
Michael Herskovic
CEO @ MIH Products
"There are a lot of Shopify developers out there, but most are not as talented as Mladen. He created a website for me from a wireframe, and he did a great job coding the Shopify modules so that I can easily customize them without using code.
I would highly recommend Mladen for any Shopify work - he did a great job. He gave me status updates without me having to ask, and he was able to meet the deadline. A+ :)"
Annie Sullivan
Webmaster @ Diabetic Source
"Mladen is an exceptional freelancer to work with. We sought a highly-skilled and knowledgeable developer for our project, and he was exactly that. Mladen was extremely thorough in explaining our options for improving the speed of our Shopify site. He provided honest feedback about the scope of work required and was patient answering all of our questions throughout the project. He delivered the work as promised ahead of schedule. I look forward to working with him on additional projects. I highly recommend Mladen without reservation."
Julien Didry
Digital Marketing Manager @ RUVE
"The second time that we work with Mladen and he has delivered perfect work and completed all tasks asked. We will work with him again in the future. I highly recommend Mladen for your Shopify store."
