• migration production system to cloud• design and implementation micro services to process fast and secure transactions. Used by tills, external integrators, pos terminals, ecommerce. • developed terminal management system, authorisation and transactions system• decomposed the system into microservices running on Docker, improving scalability and efficiency.

• Designed and implemented the Guzik system for Procter&Gamble using Scala, Play, Rest, Angular/React, Bootstrap, MongoDB, Android, and Docker.• Developed a mobile payment touchless solution utilizing beacon-based devices with Java, Spring, JS/Angular/React, Bootstrap, JPA, Hibernate, Postgresql, Tomcat, iOS, and Android.

Building application for orchestration F5 BIG-IP product. Using Microservices, Cloud, Java, Node.JS

vending machine solution: developed a frontend application and backend transaction system. Led the project to successful completion

Senior Designer/ProgrammerHead of Software Development from 2011• Realized projects involving design architecture and implementation of applications forming transaction platforms(Java, C++, PostgreSQL, C#) providing services and electronic products through terminals, cash registers and vending machines, for central, east and south European countries:Project: Design and implementation of Mobile Payment transaction platform iKASA for Biedronka chain(backend, frontend, mobile clients)(Java, Spring, BouncyCastle,Tomcat, CodenameOne framework, JQueryMobile, JPA, Hibernate, Postgresql. Primefaces, Mockito, maven, Tomcat, Apache)Project: Design and implementation of integrations with external partners through dedicated Webservices accessing company products (Java, Spring, JAX-WS, Junit, Mockito)Project: Design and implementation of new modular transaction platform with services BillPayment, Prepaid, TopUp, “Message Distributing System”, “eInvoice” (Java, Spring, JAX-WS, RMI, JNA, JNI, JAXB, PostgreSQL, Junit, Mockito).Project: Design and implementation of CRM web based application(Java, JEE, Hibernate, Spring, JSF2, Facelets, IceFaces, PostgreSQL, Atomikos, JSON, PD4ML, Junit, Tomcat). Application is Project: Design and implementation of server multithreading application as a front layer of transaction system to provide platform's services to external clients using their protocolsProject: Changes of design and implementation of server application (multithreading server) introduced for Auchan Poland markets (C++, ascii based internal protocol).Project: Numerous improvements and fixes for transaction system server (C++).Project: Design and implementation of software checking integration of stock data of transaction system (C++, Sql, plSql).Area of responsibility:− Managing development team.− Technical oversee and control of system architecture and projects evolution.− Preface and technical specifications creation.− Implementation of applications.

OPTOGRAPHX at Warsaw University of Technology is R&D unit which develops high-tech multimedia technology.• Developer in project of 4D scanner - creation of 3D mesh motion representation of measured objects from four directions in real-time processing (i.e. people ) (C++).• Designed and implemented lossy and lossless compression algorithms for the Aurora project, optimizing 3D object animations.• Contributed to the Virtual studio project by developing client-server software for remote process management.