Dejan is available for hire
Hire DejanDejan Beljic
Verified Expert in Engineering
Software Engineer and Magento Developer
Belgrade, Serbia
Toptal member since October 11, 2019
Bio
Dejan is a software engineer with 16+ years of experience. Since 2011, he has worked as a consultant, senior back-end developer, and support engineer on various Magento 1 and Magento 2 projects. He has also led or worked in many international development teams. Dejan is eager to acquire new knowledge and he strongly believes that broadening knowledge is the key to success.
Portfolio
Zoey
Magento, Shopify API, Shopify, APIs, Magento API
Silver Gold Bull Inc.
PHP, Magento, Redis, Elasticsearch, Amazon Web Services (AWS), APIs, Symfony...
Growers House LLC
Magento, Elasticsearch, MySQL, Magento 2, Redis
Experience
- PHP - 20 years
- MySQL - 17 years
- Magento 1 - 14 years
- Adobe Commerce - 10 years
- Magento - 9 years
- Magento 2 - 9 years
- Amazon Web Services (AWS) - 6 years
- Shopify API - 2 years
Preferred Environment
Amazon Web Services (AWS), Bitbucket, PhpStorm, Ubuntu
The most amazing...
...project was the migration from Magento CE 1.3 to Magento EE 1.10, including a catalog with more than 500,000 products and three websites.
Work Experience
Magento Back-end Developer
2025 - PRESENT
Zoey
- Developed and maintained complex Magento 1—Shopify integrations, including order synchronization, product mapping, and custom data flows.
- Built payment automation workflows (including Braintree/Shopify flows), handling transaction logic and edge cases.
- Worked on custom import/export pipelines (CSV/DataMapper) for large-scale order and product processing.
Technologies: Magento, Shopify API, Shopify, APIs, Magento API
Magento Back-end Developer (via Toptal)
2021 - 2025
Silver Gold Bull Inc.
- Led development of the Trade app, a platform used for trading gold and silver ounces (virtual assets, not physical products).
- Provided Magento 1 app monitoring and fixed bugs and performance issues.
- Integrated the Magento 1 core app with ClearSale, nFusion, CloudFlare, CloudFront, Fintrac, Postmark, DeliveryDefense, Strapi, Zoho, etc.
- Built the Trade app API using Symfony and gRPC, which was designed for integration with mobile applications.
Technologies: PHP, Magento, Redis, Elasticsearch, Amazon Web Services (AWS), APIs, Symfony, gRPC, API Integration
Magento 2 Developer | Greenhouse Solutions
2021 - 2024
Growers House LLC
- Handled all aspects of development (front end and back end).
- Built new features and monitored and optimized performances in Adobe Cloud.
- Worked directly with the CTO to translate requirements into Magento features.
Technologies: Magento, Elasticsearch, MySQL, Magento 2, Redis
Magento 2 Migration Expert
2020 - 2024
4tekgear.com
- Migrated Magento 1 to Magento 2, developed a custom theme, installed necessary extensions, and implemented custom API integrations (Amazon, TechData, and more).
- Maintained and upgraded the site as needed, handling the entire development lifecycle as a one-person team.
- Optimized performance consistently, especially after syncing over 100,000 products.
Technologies: Magento, Data Migration, Magento 2, API Integration
Magento Expert and Lead via Toptal
2020 - 2021
Elabelz
- Performed the migration of customer Webshop to Magento 2 Cloud.
- Led integration with CRM, helping with mobile app development.
- Imported catalogs from the legacy system using Firebear extension and customizations.
- Customized Multi-marketplace extension for several retails.
Technologies: Magento 2, Magento, Apps, Magento API, Adobe Commerce, Magento Cloud
Tech Lead
2017 - 2021
eCommistry
- Led support teams on various projects (M1 EE, M1 CE, M2) running in AWS.
- Suggested solutions and project and infrastructure improvements.
- Performed code and performance optimizations on legacy projects.
- Quoted and estimated new M2 projects (new builds, migration).
- Contributed to building the Magento/PHP internal training.
Technologies: Amazon Web Services (AWS), Magento 2, Magento, Back-end, APIs, MySQL, React, Full-stack, Magento Extension Development, eCommerce
Team Lead
2015 - 2017
Solution for Human Capital
- Led development team, new projects setup, and migration.
- Implemented several M1 and two M2 Commerce Cloud projects.
- Suggested solutions and project/infrastructure architecture and provided support for implemented projects.
- Participated in various integrations with third-party services (SAP, Cloudinary, among others).
Technologies: Magento 2, Magento 1, MySQL, APIs, Full-stack, Back-end, Magento Extension Development, Magento, eCommerce
Senior Magento Developer, Team Lead, and Support Engineer
2011 - 2015
Westum
- Led the development team on various Magento enterprise projects.
- Worked as a team member of the international support team to Magento Enterprise clients.
- Implemented various Magento features and functionalities through extensions.
- Proposed components and tools for development and led an internal training initiative.
- Organized code reviews and coding standards implementation across the company.
Technologies: MySQL, PHP, Magento 1, APIs, Full-stack, Back-end, Magento Extension Development, Magento, eCommerce
Expert Associate
2010 - 2011
Metropolitan University, Faculty of Informational Technologies Belgrade
- Designed and built an internal Java-based information system.
- Served as a teaching assistant on the subject C# Basics.
- Acted as a teaching assistant on the subject of Information Systems design.
- Took part in internal e-learning system maintenance.
- Built documentation and various learning materials.
Technologies: Oracle, MySQL, Apache Tomcat, RichFaces, JSF, Hibernate, Spring
Software Developer
2007 - 2010
Telekom Serbia
- Provided support for VAS (value-added services) payment platform.
- Implemented various VAS services (voting, parking, safe SMS).
- Implemented various internal Web applications using Java and Symfony.
- Provided support for mobile operator prepaid/P\postpaid payment systems.
- Built Java-based call charging system for a customer support center.
Technologies: Oracle, MySQL, Microsoft SQL Server, JBoss, Symfony, PHP, Apache Struts, Hibernate, Spring, Java EE (Jakarta EE), Back-end
Expert Associate
2004 - 2007
Institute Mihailo Pupin, Automation and Control Systems, Belgrade
- Participated in SCADA system development, maintenance, and support.
- Built various PLC control programs (Mitsubishi and Omron).
- Implemented IEC 101 communication protocol between Mitsubishi PLC and SCADA system.
- Constructed an internal Java-based ticketing system for internal use.
- Contributed to various system control implementations in heating plants and water supply stations.
Technologies: PHP, Java, SCADA, IEC 61131
Experience
Retail – Fundraising
Full Magento 2 Commerce Cloud implementation based on the client's requirements.
• Magento 2 customization.
• Integration with the client's ERP system.
• Third-party modules installation and customization.
Used: M2 Commerce Cloud, Jira, GitHub, Blackfire, and New Relic.
• Magento 2 customization.
• Integration with the client's ERP system.
• Third-party modules installation and customization.
Used: M2 Commerce Cloud, Jira, GitHub, Blackfire, and New Relic.
B2B – Pharmaceutical Industry
Full Magento 2 Commerce Cloud implementation based on the client's requirements.
• Magento 2 customization.
• Integration with the client's ERP system.
• Third-party modules installation and customization.
Used: M2 Commerce Cloud, Jira, GitHub, Blackfire, and New Relic.
• Magento 2 customization.
• Integration with the client's ERP system.
• Third-party modules installation and customization.
Used: M2 Commerce Cloud, Jira, GitHub, Blackfire, and New Relic.
Retail – Food Industry
Full Magento Enterprise implementation (Chinese and Hong Kong markets).
• Member of an international team of 5-7 front-end and back-end developers and three QA engineers.
• Support QA testing and validation.
Used: M1 EE, Scrum, Jira, FishEye, Crucible, and Vagrant.
• Member of an international team of 5-7 front-end and back-end developers and three QA engineers.
• Support QA testing and validation.
Used: M1 EE, Scrum, Jira, FishEye, Crucible, and Vagrant.
Retail – Professional Equipment
https://www.manfrotto.com/Full Magento Enterprise implementation.
• Client discovery (define functional and non-functional requirements, assumptions, system architecture, and estimates).
• Determined components and tools for development.
• Implemented coding standards and code review procedures.
• Prepared training for the client.
• Determine and lead the development team.
Used: M1 EE, Review Board, and Bitbucket.
• Client discovery (define functional and non-functional requirements, assumptions, system architecture, and estimates).
• Determined components and tools for development.
• Implemented coding standards and code review procedures.
• Prepared training for the client.
• Determine and lead the development team.
Used: M1 EE, Review Board, and Bitbucket.
Retail – Apparel and Accessories
Full Magento Enterprise implementation based on client requirements.
• Magento application customization, including module planning, development, and testing.
• Integration of custom gift card system and Magento.
• Supported QA testing and validation.
• Team (international team with more than ten front-end and back-end developers and five QA engineers)
Used: M1 EE, Scrum, Jira, FishEye, Crucible, and Vagrant.
• Magento application customization, including module planning, development, and testing.
• Integration of custom gift card system and Magento.
• Supported QA testing and validation.
• Team (international team with more than ten front-end and back-end developers and five QA engineers)
Used: M1 EE, Scrum, Jira, FishEye, Crucible, and Vagrant.
Education
2004 - 2007
Specialist Degree in Internet Technologies
Faculty of Organizational Sciences - Belgrade, Serbia
1997 - 2003
Master of Science Degree in Electrical Engineering, Computer Science and Systems Control
Faculty of Technical Sciences - Novi Sad, Serbia
Certifications
JANUARY 2020 - JANUARY 2023
AWS Certified Cloud Practitioner
Amazon Web Services
AUGUST 2019 - PRESENT
Magento 2 Certified Associate Developer
Magento
JANUARY 2015 - PRESENT
Magento Certified Solution Specialist
Magento
JANUARY 2013 - PRESENT
Magento Certified Developer Plus
Magento
Skills
Libraries/APIs
jQuery, Shopify API, RichFaces, React
Tools
PhpStorm, GitHub, Bitbucket, Jira, Apache Tomcat, AWS ELB, Crucible, Vagrant, Blackfire, Atlassian Fisheye
Languages
PHP, Java, C#
Frameworks
Symfony, Zend Framework, Spring, Hibernate, JSF, Apache Struts, Knockout (Knockout.js), gRPC
Platforms
Adobe Commerce, Magento 1, Magento 2, Magento, Magento Extension Development, Magento Enterprise, Magento Community Edition, Amazon Web Services (AWS), Magento API, Ubuntu, Oracle, Java EE (Jakarta EE), JBoss, Docker, New Relic, Shopify
Storage
MySQL, Microsoft SQL Server, Redis, Elasticsearch, Amazon S3 (AWS S3)
Paradigms
Scrum
Other
eCommerce, Back-end, APIs, Migration, IEC 61131, SCADA, Electrical Engineering, PWA, Full-stack, Architecture, Progressive Web Applications (PWAs), Apps, Magento Cloud, Software Deployment, Web Security, API Integration, Data Migration
Collaboration That Works
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
1
Share your needs
Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2
Choose your talent
Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3
Start your risk-free talent trial
Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.
Top talent is in high demand.
Start hiring