Creating and developing innovative software solutions for different clients across a broad range of industries.

Worked on maintenance and development of new features for Dine+Go (https://dineandgo.com/) mobile application’s backend with Ruby and Elixir.

Kept backwards compatibility with earlier version of the application.

Added new features according to schedule.

Built Clarus Warehouse Management System (https://www.claruswms.co.uk) from scratch and took it to the point where it successfully deployed and used by clients.

Implemented system for processing big amounts of items with sophisticated statuses flow.

Built JRuby web-tool for Paypal’s HR managers that allowed them to create custom PDF documents.

Led the front- and back-end performance bench marking and optimization and implemented a fully automated continuous integration process.

Conducted weekly demos for the CEO and actively participated in sprints planning and played integral role in utilizing and promoting the company's Scrum philosophy.

Created integration tests with Capybara covering new functionalities and developed a Ruby on Rails application using Java for the back-end.

Led numerous comprehensive projects for multiple clients across a broad range of industries.

Developed custom Redmine extensions and improved functionalities.

Created a Symfony-based eCommerce project for one of the biggest Polish price comparison sites.

Built an internal SOAP API and tested code with PHPUnit and RSpec.

Implemented new functionalities for the company's website including new client profiles, tested using PHPUnit and Selenium, and created an internal API with the Silex framework.

Optimized performance using Memcached, Membase and the Sphinx Search Server.

Improved core site functionality including a complex candidate search engine for recruiters.

Audited and improved the performance and security of various websites.

Designed and developed various CRM applications.

Developed websites with PHP and Rails.