My journey in the software world began in 2019 at Kolaysoft, where I started my career and gained valuable experience. In Kolaysoft, I had the opportunity to work on a major e-invoice project, where we provided portal services to clients, and developed web services for other companies. Despite being in a junior role, I took on significant tasks and personally developed numerous web services from scratch.I worked at Türk Telekom Fixed Data Billing management, focusing on migrating an Oracle-based system to Java on a module basis, and issued millions of invoices every month. I was in the team that transferred the modules step by step from PLSQL code to Java, determined as our tasks in the previously mentioned project. Having new requests demanded by the business units, I organized analysis and design meetings relevant to these requests, and if necessary; I made code developments on both the Java and Oracle sides of the requests. Moreover, when we had projects involving more than one directorship, I took on the responsibility of being a Project Leader in one of these projects.My first client at OBSS was Garanti BBVA Banking, and I worked as a Java Developer/Consultant in the section of Payment Systems - Merchant Reporting team. We periodically develop and maintain a report generator system for millions of generic or merchant-specific reports. Our system contains Java/Spring in monolith architecture and Mainframe repositories. We are working on more than 30 repositories. Regularly, we transfer mainframe repositories to spring projects using the ark framework, developed by Garanti Technology. In addition, we transfer billions of rows between a three-layered database - DB2/DWH/Oracle - daily with ODI jobs. I am also a representative of DevOps in my team.After working in payment systems at Garanti BBVA for nearly two years, I was assigned by OBSS to the Military Defense Flight Radar Fusion Project at ASELSAN. While working at ASELSAN, I had the opportunity to contribute to a Microservice gateway project for processing incoming data from TCP/UDP ports, where I also served as a consultant. I played a pivotal role in swiftly converting and processing high-volume data into radar data in real-time intervals, significantly impacting the project's success. Collaborating with my team, we skillfully implemented key features and enhanced the project's functionality.Currently, I am working as a Senior Java Developer/Senior Consultant for OBSS at Turkish Airlines Technology for Online Information Library and Agency Flight Booking and Sales Projects.