Rafał Kos, Developer in Parkosz, Poland
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Rafał Kos

Verified Expert  in Engineering

Software Developer

Parkosz, Poland

Toptal member since August 22, 2019

Expertise
MagentoPHPjQueryMySQLRedisWindows DevelopmentLinuxDockerC#
Bio

Rafał is an experienced technical architect with a demonstrated history of working in the outsourcing/offshoring industry. He is a Magento-certified developer and has several years of hands-on and in-depth experience developing with Magento 1. For the past few years, he's been specializing in Magento 2 development. Rafał really shines in building and implementing performance improvements on a client's store.

Portfolio

Blue Acorn iCi
Magento 2, Magento API
Unity Group S.A.
Magento 2, PHP, MySQL, Performance
Flexishore
MySQL, Redis, Varnish, Magento 2, Magento 1, PHP

Experience

  • PHP - 12 years
  • Magento - 12 years
  • Magento API - 12 years
  • Magento 1 - 10 years
  • MySQL - 9 years
  • Redis - 8 years
  • Algolia - 4 years
  • Magento 2 - 4 years

Availability

Part-time

Preferred Environment

Docker, PhpStorm, Linux, MacOS

The most amazing...

...project I've worked was on a Magento website with more than 700,000 products, where I achieved a response time of less than 300 milliseconds.

Work Experience

Technical Architect

2021 - PRESENT
Blue Acorn iCi
  • Worked with customers to understand needs and provide excellent service.
  • Used critical thinking to break down problems, evaluate solutions, and make decisions.
  • Participated in continuous improvement by generating suggestions and engaging in problem-solving activities to support teamwork.
Technologies: Magento 2, Magento API

Magento 2 Back-end Developer

2019 - 2021
Unity Group S.A.
  • Designed, made decisions on technology, and advised clients on the best technical solutions to their business problems.
  • Designed and improved application scalability and extensibility using complex caching and load balancing solutions.
  • Assessed technologies and solutions that will be used in a project.
Technologies: Magento 2, PHP, MySQL, Performance

Senior Magento Developer

2010 - 2019
Flexishore
  • Developed new modules for existing and new Magento projects.
  • Adjusted existing modules to meet new business requirements.
  • Optimized webshops for high performance (both the back end and front end).
  • Managed servers using CentOS, NGINX, PHP-FPM, and Varnish.
Technologies: MySQL, Redis, Varnish, Magento 2, Magento 1, PHP

Systems Designer | C# Developer

2009 - 2010
Tikkurila Polska
  • Developed internal applications with C#.
Technologies: Microsoft SQL Server, C#

Prodealcenter

https://www.prodealcenter.fr
Proddealcenter is a pioneer and leader in the sale of agricultural spare parts on the internet and is the winner of the hope category of the Federation of eCommerce and Distance Selling (FEVAD) and many other competitions. Today, Prodealcenter is the market leader due to strong growth, and since 2010, continues to develop its business in France.

ConsoBaby

https://www.consobaby.com
ConsoBaby has over 800,000 consumer reviews and ratings on 30,000+ baby products. The site includes information on product testing and consumer panels and has a proprietary comparison shopping engine.

Selency

Selency is the first curated marketplace in Europe to buy and sell used furniture and home decor.

MagicDream

https://www.magicdream.fr
I migrated an application from Magento 1.6 to version 2.1. and also developed custom features.
2002 - 2009

Master's Degree in Computer Engineering

Cracow University of Technology - Kraków, Poland

FEBRUARY 2020 - PRESENT

Magento 2 Associated Developer

Magento, Inc.

AUGUST 2016 - PRESENT

Magento Certified Developer

Magento, Inc.

Libraries/APIs

jQuery

Tools

PhpStorm, Varnish

Platforms

Magento 1, Magento 2, Algolia, Magento, Magento API, Windows, Linux, Docker, MacOS

Languages

PHP 7, PHP, C#

Storage

MySQL, Redis, Microsoft SQL Server

Paradigms

Kanban

Other

Performance, Computer Engineering

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