Çağrı Çolak

Main Responsibilities: • Encrypting and signing banking transactions in accordance with the BDDK directive of the State Banking Regulation and Supervision Agency • Mentoring junior developers • Maintaining projects and fixing errors Achievements and Projects: • Encryption and signing of banking transactions in the Maximum Mobile project • Renewing the user login token without logging them out • Writing a common framework for token renewal and transaction signing for Pazarama and Maximum Mobile projects

Key Responsibilities: - Conducting technical analysis of developed applications and planning and implementing solutions for errors based on Crashlytics reports - Supporting new R&D efforts in feasibility and process analysis - Mentoring junior developers Achievements and Projects: Increasing the crash-free rate of CarrefourSA applications from 91% to 98%

Main Responsibilities: • Supporting clients who receive services from the consultancy firm Achievements and Projects: • Developing new planned features for the CarrefourSA application • Maintaining the AktifBank mobile application and developing new features

Main Responsibilities: • Supporting clients who receive services from the consultancy firm • Mentoring junior analysts and developers Achievements and Projects: • Developed the Fenerbahçe iPad application, which displays stock and sales information for Fener stores nationwide, and made it available through the internal app store • Developed and maintained the 4Mevsim application for Bayer Group • Developed and maintained the Avis Turkey application • Developed and maintained the Budget Turkey application

Main Responsibilities: - Managing the architecture, code quality, and development of an application that serves seven platforms under one app. Achievements and Projects: - Leading a 12-person team to launch a project in the U.S. - Implementing Git submodule in the project architecture for the first time, enabling modular updates for seven different platforms without developers overwriting each other's code. This was inspired by Swift SPM and utilized Git's long-standing features.

Main Responsibilities: - Supporting clients who receive services from the consultancy firm. Achievements and Projects: - Migros, Sanal Market – Macro Online – Taze Direkt: Fixing bugs and implementing new developments. - GSK: Developing an SMS verification module for doctors to log into the system. - Kariyer.net: Fixing issues and making the HRVenue online interview video conferencing system operational.

Main Responsibilities: - Developing bug fixes and new features for Turkcell mobile applications, including Platinum, İş Yerim, and Hesabım projects. - Rebranding and developing the Turkcell Hesabım project from scratch as Digital Operator, and launching it. This is now the current Turkcell application. Achievements and Projects: - Partially redesigning the Turkcell Platinum application. - Developing the Digital Operator project from scratch and integrating the Zekai domestic AI chatbot service.

Main Responsibilities: - Developing a mobile application for inventory management for İstanbul/İSTAÇ that is compatible with SAP. Achievements and Projects: - Developing and delivering the İSTAÇ Duran Varlık project compatible with SAP. - Developing and delivering the Bilkom Smile and Start R&D project.

Main Responsibilities: - Developing and continuously improving the Restaurant QR Menu project based on customer needs. Achievements and Projects: - Developing the Mösyö Menu QR application and making it available through the internal app store.

Main Responsibilities: - Developing and continuously improving the Restaurant QR Menu project based on customer needs. Achievements and Projects: - Developing the MQR Menu application and making it available through the internal app store.

Main Responsibilities: - Providing support for startup projects receiving consultancy services. Achievements and Projects: - Developing and delivering the Fotowoo project from scratch for the CEO of ING Bank Turkey.

Main Responsibilities: - Developing a native iOS project for a web application used by companies receiving advertising consultancy services to track their ad displays. Achievements and Projects: - Developing the ReklamStore ad impression analysis application and making it available to clients (such as Petrol Ofisi) through the internal app store.

Main Responsibilities: - Coding the development of mobile board games for native iOS devices. Achievements and Projects: - Developing and launching the Horoscope mobile gaming platform iOS application from scratch.

Main Responsibilities: - Developing the iOS application for a mobile food ordering platform startup project. Achievements and Projects: - The project could not be launched due to insufficient team formation and financial issues.