- Architectural design and development of an API application developed in Spring Boot- Refactoring of a legacy web application written in Java EE 6 and JSF (PrimeFaces) by covering with unit tests and implementing new features by applying TDD and SOLID principles- Fixed manual build and deployment of IIS web sites by implementing a Continous Integration mechanism and a Continous Delivery pipeline in Javascript using NodeJS and Gulp library- Designed and developed a Content Management System to serve multiple websites by applying TDD and implementing Hexagonal Architecture and CQRS pattern using ASP.NET MVC 5, Entity Framework 6 and Autofac DI frameworks in C#- Mentored and trained developers on OOP, SOLID principles, Unit Testing, TDD and Refactoring

- IBM SOA (ESB, ODM & DataPower Gateway) PoC - Analysis, refactoring and automated documentation implementation of enterprise components - Developed a token based authorization layer in Java EE using TDD - Architectural refactoring of Java EE web applications (e.g. findeks.com) - Error and bug analysis and solution advisory - Load testing and bottleneck analysis of Java EE web sites - Static code analysis advisory

- Reduced startup time of an in-house integration software written in Java over %95- Redesigned and rewrote a stored procedure execution software, processing over 16 million transactions per day- Maintenance and engineering team support of in-house Managed File Transfer application, ESB application and Pricing Engine- Developed, maintained and provided engineering team support of UI components for Internet Banking application in C#, JavaScript & jQuery- Added monitoring and management capability for various in-house server applications by serving real-time data on back-end and showing the aggregated data on ASP.NET MVC web pages developed in C#

- Designed and developed a server and a framework for the ATM system of a local bank in Turkey to develop business ideas faster and decrease time to market by implementing NCR APTRA Advance NDC communication protocol in Java and using Netty, Ehcache, Hessian, iBATIS, log4j libraries.- Analysed, designed and coordinated an ATM User Interface and Statement Designer, Publisher and Simulator in C# implemented in partnership with Gebze Technical University as a Republic of Turkey Ministry of Science, Industry and Technology project

- Designed and implemented a framework to develop a Hospital Information System in n-tier architecture applying MVP and Repository patterns in C# as a Windows Forms application using XP methodology- Developed and maintained an HIS for two hospitals using Visual RPG programming language and DB2 database to organize medical data and make business processes better- Integrated legacy HIS with Medula (Provision system of Social Security Institution of Turkey) over SOAP Web Services by developing an ActiveX DLL library using C++ and ATL- Integrated HIS with a local accounting software (named ETA SQL) over MSSQL database by reverse engineering SQL queries run on the database- Applied Continuous Integration practice to eliminate manual build operations and provide fast feedback using CruiseControl.NET, SVN, NUnit and MSBuild- Eliminated manual operations by integrating HIS with laboratory equipment through serial port interface