cmitsis85@gmail.com Christos Mitsis +306939159941 Senior Software engineer Athens, Greece linkedin.com/in/christos-mitsis-a359961a9 Innovative, task-driven professional with 10+ years of experience in software engineering with a Master's degree focused in Advanced Informatics and Computing Systems - Software Development and Artificial Intelligence from University of Piraeus. Proficient in developing and testing secure web applications, implementing web services and new features, troubleshooting simple/complex issues, analyzing, designing and optimizing databases. WORK EXPERIENCE SKILLS Senior PHP software engineer Viva Wallet 06/2021 - Present, Achievements/Tasks Marousi, Athens, Greece PHP SQL Laravel CSS JavaScript WordPress Git Docker HTML Jira Developed a Laravel application as an intermediate payment application between an e-commerce platform and payment provider. Confluence Microsoft Azure Cloud Services Web Services Developed a PHP library used by company's payment plugins for the most popular e-commerce platforms. Rest API Elasticsearch Developed new payment plugins and constantly improved and optimised them. Redis Collaborated with QA department, to deliver high-quality software products. Web Developer Altair Travel Agency S.A. 04/2013 - 06/2021, Palaio Fairo, Athens, Greece Online travel agency - tripair.net, euroferries.com Achievements/Tasks Implemented a Global Distribution System API, integration on the web application and presentation of the whole project in the major development center of the GDS company. GrayLog Soap API SSDB XML MacOS Online Travel CERTIFICATES Writing Secure Code in PHP (02/2021 - 02/2021) INFOSEC Skills EDUCATION Implemented Payment Gateway's web services and integration on the web application. Master in Advanced Informatics and Computing Systems - Software Development and Artificial Intelligence. University of Piraeus Developed many features/applications. 09/2009 - 03/2013, Improved and optimised all the aspects of the web application (code design, database structure, refactoring code). Bachelor in Informatics and telecommunications National & Kapodistrian University of Athens Troubleshoot different components of web application by deploying updated knowledge of the modern technologies and techniques in the industry. Piraeus, Athens, Greece 09/2003 - 06/2009, Athens, Greece LANGUAGES English French Professional Working Proficiency Elementary Proficiency INTERESTS cycling running