MUSTAFA ÇELİK

• Led cross-functional web and mobile development teams (Team Leadership, Engineering Management, Agile/Scrum) to deliver secure, scalable, high-quality applications, improving overall delivery efficiency by 30%+. • Owned end-to-end software delivery (System Architecture, Full-SDLC, Technology Strategy) from requirements analysis and solution design • Drove CI/CD, DevOps, and cloud adoption (AWS, Azure, GCP, Infrastructure, Automation) to enable faster, more reliable releases and reduce deployment risks.

• Led the implementation of multi-product solutions including websites, mobile applications, and hardware systems supporting enterprise-scale deployments. • Delivered an airport marketplace platform enabling digital order creation for multiple products, improving operational efficiency and product discoverability. • Delivered an all-in-one InfoKiosk platform integrating multiple services, deployed across 6+ airports, increasing platform sales and generating €100K+ in direct revenue with the team.

• Developed Android applications using Java and Kotlin with MVVM, MVP, and MVC design patterns, contributing to ~20% growth in user engagement through stable mobile experiences. • Created Smart Watch and Kiosk applications using HTML, CSS, JavaScript for airport and enterprise environments. • Designed and implemented RESTfulweb services using Node.js, .Net Core, SpringBoot to support mobile and web platforms. • Built server-side applications and services leveraging Hibernate, Redis, RabbitMQ, Memcached.

• Developed and maintained Android applications using Java, delivering stable and user-friendly mobile solutions. • Designed and implemented RESTful API structures. • Modernized existing applications by redesigning legacy user interfaces with current UI/UX trends, improving usability and visual consistency , resulting in ~20–25% increase in user conversion rates and in-app interactions. • Collaborated with backend, frontend teams to ensure smooth integration and consistent user experience

• Managed and coordinated cross-functional project teams, improving execution efficiency by ~15% through structured communication and task tracking. • Developed Android applications using Java contributing to improved user engagement and application stability. • Designed and optimized backend database structures using MongoDB and MySQL, improving query performance by ~30%. • Implemented RESTful and SOAP web services using PHP and .NET, enabling reliable communication between mobile, web, backend systems.

• Investigating complex technical issues, regarding Zend Framework applications • Analyzing call logs and consolidated common trends and underlying problems • Reducing the number of technical support inquires by 30 percent, by creating documentation addressing common technical issues • Communicating technical information, both written and verbal, effectively to clients of varying technical experience • Helping QA and clarified their doubts while regression testing of the module

This company works about sub-service management platform with using ExtJS. We try to develop company's applications which called "Asistan Technical Service". Also trying to work on mobile platform this application(includes Android,Iphone, Windows Mobile etc).

Android uygulama geliştirildi. ROR üzerine web sitesi yapıldı.

Web uygulamaları(PHP, Ruby), Mobile uygulamalar , Java Enterprise Edition(J2EE)