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Tomasz Kowalczewski has a long and varied work experience. Tomasz began their career in 2005 as an Intern at ComArch S.A. In 2006 they were an Intern at Sabre Holdings, where they extended and fixed Fitnesse Acceptance Testing Framework and wrote new fixtures for testing web services, TPF, etc. In 2007 they were a Java Developer at Sabre Holdings and then in 2008, they were a Senior Java Developer and Java Development Contributor at Sabre Holdings. In 2012 they were a Tech Lead at CodeWise Sp. z o.o. and in 2019 they were the CEO at Tornimo.io. Currently, they are a Software Engineer Lead at Volt Active Data.

Tomasz Kowalczewski obtained a MSc in Computer Science from AGH University of Science and Technology between 2002 and 2007. Tomasz also obtained certifications from various institutions, including Coursera, Oracle, and Scrum.org. In 2018, they obtained a Deep Learning Specialization and a Sequence Models certification from Coursera. In 2017, they obtained certifications from Coursera in Convolutional Neural Networks, Improving Deep Neural Networks: Hyperparameter tuning, Regularization and Optimization, Neural Networks and Deep Learning, and Structuring Machine Learning Projects. In 2011, they obtained an Oracle Certified Master: Java Developer 6 certification from Oracle, and a Professional Scrum Master I certification from Scrum.org. Finally, they also obtained a Sun Certified Java Programmer certification from Sun.