Janusz Paśkiewicz, Developer in Rzeszow, Poland
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Janusz Paśkiewicz

Verified Expert  in Engineering

Software Developer

Rzeszow, Poland
Toptal Member Since
February 13, 2019

Janusz is a senior and lead web developer with a Magento 2 expert certification and more than a decade of professional experience. He is a quick learner with a flexible and enthusiastic personality and can work on his initiative or in a team. Janusz is always hungry to learn more and loves challenges. Currently, he is focused on the Magento platform.


Sintra Consulting Poland
Magento, Magento Enterprise, Magento Extension Development...
RabbitMQ, Solr, Node.js, MongoDB, MySQL, Magento, PHP 7, Laravel, APIs...
PGS Software
OXID, Symfony, Zend Framework, jQuery, JavaScript, CSS, HTML, MySQL, PHP...




Preferred Environment


The most amazing...

...thing I've developed is a lottery portal that is the second most popular site in the industry in Poland.

Work Experience

Magento 2 Developer | eCommerce CTO

2019 - PRESENT
Sintra Consulting Poland
  • Led the eCommerce development team that was working on Magento projects.
  • Supported project development and troubleshot issues.
  • Fostered the expansion of the team's technical skillset and the adaptation of new technologies and solutions.
Technologies: Magento, Magento Enterprise, Magento Extension Development, Object-oriented Programming (OOP), Back-end, SQL, Full-stack, Plugins, MySQLdb, Performance Tuning

Senior Magento Developer | Team Leader

2014 - 2019
  • Led the Magento software development team with scrum methodology.
  • Created many different features, mainly involving the Magento back-end.
  • Contributed to many integrations with microservices around Magento.
  • Supported G2A whenever necessary, as it is a jam-packed website, so there were many performance challenges to overcome.
Technologies: RabbitMQ, Solr, Node.js, MongoDB, MySQL, Magento, PHP 7, Laravel, APIs, JavaScript, New Relic, NGINX, Git, REST APIs, Object-oriented Programming (OOP), Back-end, SQL, Vue, Full-stack, Plugins, MySQLdb, Performance Tuning

Senior PHP Developer

2010 - 2014
PGS Software
  • Worked for a software house as a PHP web developer, working closely with various clients.
  • Migrated a client's shopping cart based on an old OXID engine to an entirely new OXID engine, which involved porting many custom modules.
  • Provided long-term support of a CRM system. This system was created with a custom PHP framework, so creating many new features and fixing existing bugs was necessary.
  • Worked using PHP Frameworks like Zend and Symfony.
  • Upgraded WordPress CMS website to its newest version, preparing layout including all CSS custom changes to match the received design.
Technologies: OXID, Symfony, Zend Framework, jQuery, JavaScript, CSS, HTML, MySQL, PHP, WordPress, PHP 5, HTML5, REST APIs, Back-end, CakePHP, SQL, Full-stack, Plugins, MySQLdb, Performance Tuning

Technical Architect | Lead Developer

2008 - 2010
  • Led and managed various projects, mostly custom eCommerce engines.
  • Created solutions from scratch and modify existing websites and eCommerce solutions.
  • Architected with Magento 0.8 Beta.
  • Ensured that the projects met high SEO standards as this was a mainly SEO company.
Technologies: osCommerce, X-Cart, Magento, jQuery, JavaScript, MySQL, PHP, SEO Tools, Search Engine Optimization (SEO), CubeCart, Object-oriented Programming (OOP), Back-end, SQL, Full-stack, MySQLdb, Performance Tuning

Java and Delphi Programmer

2006 - 2007
  • Contributed to the build of a data warehouse for a big insurance company.
  • Programmed in Delphi and Java. Developing custom software to manage the data warehouse.
  • Created Oracle packages and procedures in PL and SQL.
  • Identified and resolved bugs or errors reported by the client in the current release of the program.
Technologies: PL/SQL, Oracle, Delphi, Java, Object-oriented Programming (OOP), Performance Tuning

G2A.com Website

I created many features on G2A.com as a Magento 1 full-stack developer during my 5-year full-time position there. For example, I worked as the lead developer who implemented the option of selling electronics in the marketplace.

Maintenance of Magento Websites

I developed several improvements and bug fixes for a family of websites that I was maintaining in 2011-2012:

• https://viviscal.com

• https://viviscal.co.uk

• https://viviscal.es

• https://viviscal.pt

Portal for Lottery Games Fans

In 2004, I created a portal for enthusiastic fans of Polish lottery games. Over time, the portal became this category's most popular independent website. It has about 100,000+ visits daily, and 10+ million page views monthly.

I am still the portal's owner, developer, and admin.

Migration from Magento 1.9 into Magento 2.4

I handled the full migration of a very successful eCommerce shop from Magento 1 to the newest Magento 2.4. I did the whole migration alone as a freelancer, starting with preparing the new hosting server, continuing with data migration, and handling all the required third-party modules' customization.
2001 - 2006

Master's Degree in Computer Engineering

Politechnika Rzeszowska - Rzeszów, Poland


Adobe Certified Expert — Magento Commerce Developer



Magento 2 Professional Developer

Magento, Inc.


jQuery, REST APIs, Shopify API, Node.js, Vue


Magento Modules, NGINX, PhpStorm, CubeCart, Jira, Git, RabbitMQ, Solr


PHP, HTML, PHP 5, HTML5, PHP 7, SQL, JavaScript, CSS, Java, Delphi


Object-oriented Programming (OOP), Search Engine Optimization (SEO)


New Relic, Magento 1, Magento, Magento 2, Magento Extension Development, Magento API, Magento Enterprise, Shopify, X-Cart, osCommerce, Oracle, Linux, WordPress


MySQL, MySQLdb, MongoDB, Redis, PL/SQL


Laravel, Symfony, CakePHP, Zend Framework


Web Development, eCommerce, Back-end, Full-stack, Plugins, APIs, Websites, Data Structures, Web Scraping, Performance Tuning, OXID, Computer Engineering, Leadership Development, SEO Tools

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