I've architected and implemented both the back- and front-end for a cryptocurrency exchange targeting the MENA market.The exchange supported crypto/fiat trading pairs and fiat rails to banks in Turkey. All the functionalities were designed and developed specifically for the exchange. No off-the-shelf solutions were used.

I've worked on the Möbius booking engine and Figur8 loyalty management engines, largely modernizing and optimizing the codebase and working on extensive bug fixes.I've architected new integrations with third-party systems, leading to new revenue streams for the company.I've worked on microservices in Java and Node.js. I have also gained extensive AWS experience and architected a new data ingestion pipeline using Lambda functions and DynamoDB on AWS.

Hayal Ortağım is a platform that enables visually challenged users to listen to the latest news, newspaper columns, and various books and magazines, as well as gather information from Turkcell's (the leading telecom company in Turkey) mobile assistant services. I developed the back-end system and administration panels. The system integrates many different textual information sources into a distributed processing queue, and all textual items are processed and turned into voice files by TTS (text-to-speech) conversion. After the conversion, the voice files are served to users via a custom-developed CDN. The platform received the GSMA 2014 award for the "Best Mobile Product, Service, or App for Accessibility and Ease of Use" category.

ACL Teslim is an on-demand courier platform for fast same day delivery requirements for businesses and consumers alike. I architected and developed the back-end software, administration panels, iOS app, and the Android apps for the startup. The applications are now being maintained by the startup. Technologies used on the back-end include Spring Framework, Spring MVC, Thymeleaf, jQuery, and MySQL. iOS and Android apps are based on a custom architecture and well-known, well-maintained third-party libraries.

YKBA is a mobile application that enables users of the banking academy to interact with a custom CMS. I developed the back-end software and administration consoles. Technologies used include Java EE, Spring Framework, Spring MVC, and MySQL.

PetSleepover is a DogVacay clone for Australian pet owners. The project's back-end was in a terrible state due to terrible management and inexperienced developers. I took over, fixed the back-end, implemented a proper workflow for handling client requests, and integrated Braintree payments correctly. Technologies used include Spring MVC, Apache Shiro, Thymeleaf, MySQL, and jQuery.

CardGusto is a loyalty program that features both physical cards and mobile applications. It enables brands to give their loyal customers promotions and gifts based on their interactions with the brand. I developed the back-end software, customer web application, administration console, and brand administration consoles. The system includes a custom analytics tool for administrators and brand managers to analyze their customers. Technologies used include Java EE, Spring Framework, Spring MVC, MySQL, Twitter Bootstrap, and jQuery.

Turkcell Cebim Guvende is an easy-to-use mobile device management solution. The system lets users track their mobile phones and take various actions on their phones remotely. I developed the back-end software and the web application. Technologies used include Java EE, Spring Framework, Spring MVC, Oracle DB, and jQuery. I also maintained the iOS and the Android apps for the project. Due to Turkcell's internal decisions, this project is not being actively maintained.

SORT is an operations management platform for a billboard company in Turkey. SORT enables the managers to assign one-off and periodic jobs to workers and track/verify their progress with photos. I developed the back-end software and administration console. The technologies used include Java EE, Jersey, Spring Framework, MySQL, jQuery, and Twitter Bootstrap.

Kalebenim is a mobile application that enables users to check in and flag places with their football team's flags on Foursquare. I developed the back-end software. The technologies used include Java EE, Jersey, Spring Framework, Apache Shiro, and MySQL.

This was a social network project that was centered on young people sharing their inspiring ideas that can change the world. The project was commissioned by YGA for the telecom company Turkcell. I developed the back-end for the system and also made contributions to the front-end development. The system also features a custom gamification engine that tracks user activities and awards achievements. The technologies used include Java EE, Jersey, Spring Framework, MySQL, and jQuery.

CardSpace is a mobile business card exchange system. I developed the back-end software. The system features synchronization across multiple devices and location-based card exchanges. Technologies used include Java EE, Jersey, Spring Framework, and Apache Shiro.

Tefal Çılgın Yumurta is a single-player mobile game application for iOS. The game features two spatulas playing air hockey on a frying pan. I developed a simple AI for the opposing spatula. The application is developed natively with Objective-C.

Leyla ile Mecnun was a popular TV series in Turkey. I developed the back-end and the administrative panels for the system. The back-end is actually a custom-written CMS with specialized data entry methods tailored to the domain model of the series. Technologies used include Java EE, Spring Framework, Apache Shiro Security, jQuery, Twitter Bootstrap, AWS S3, and CloudFront.