2016 Carrefour Poland Sp. z o.o.- creating automated testing scenarios (Java + Selenium).2015 Carrefour Poland Sp. z o.o. (integrated system for franchise)- collaboration in development process (design and testing),- complex administrative work and troubleshooting supporting,- collaborate with the client to evaluate business goals, identify business problems, and propose solutions,- design software solutions in system development process.2014 Mniamo Sp. z o.o. (mobile shopping app)- collaboration in development process (testing),- complex administrative work and troubleshooting supporting.2013 Adadio Sp. z o.o. (free adserver platform)- collaboration in development process (design and testing),- complex administrative work and troubleshooting supporting.2012 RUCH S.A.- collaboration in design and testing mobile sales application.2011 RUCH S.A.- participation in the process of building a data warehouse.2010 PKP S.A. (Polish State Railways timetable website rozklad-pkp.pl)- set up publisher tag requests, ad quality blocks and advertiser campaigns within the OpenX ad server,- support the overall delivery of campaigns by ensuring timely trafficking of campaigns, campaign performance optimization, troubleshooting, and reporting,- execute change requests and revisions to publisher inventory and ad campaigns in a timely fashion.2009 Metro Group (Metro Delivery Manager)- testing system modules,- complex administrative work and user supporting,- collaborate with the client to evaluate business goals, identify business problems, and propose solutions,- design software solutions in system development process.