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Denis Berezin has a diverse work experience starting in 2008. Denis'smost recent position is as the Lead Full Stack Developer at wohnungshelden, which they began in May 2021. Prior to that, they worked at Clear IT GmbH as a Senior Java Consultant from May 2018 to April 2021.

Before joining Clear IT GmbH, Denis worked at T-Systems CIS as a Java Developer from July 2013 to April 2018. In this role, they collaborated with other developers in a scrum team to build technical solutions and complete projects using Java 7 and 8, Spring Framework, Docker, micro services, REST, Oracle 11g, Maven, Ant, JSF, Primefaces, JQuery, HTML, CSS, and SOAP.

Prior to T-Systems CIS, Denis worked as a System Administrator at Veeam Software from April 2012 to July 2013, and at eKassir from August 2010 to April 2012. Denis began their career as a Junior System Administrator at росжелдопроект поволжье from October 2008 to June 2010.

Denis Berezin completed their Engineer's Degree in IT from South Ural State University (SUSU) during the period of 2002 to 2007. Additionally, they received certifications including Oracle Certified Professional, Java SE 7 Programmer from Oracle in April 2016, Oracle Certified Associate, Java SE 7 Programmer from Oracle in December 2015, and ITIL v3 Foundation in October 2014.