Berkan Çalışkan
@berkan
iOS Developer with 4+ years of experience building scalable and secure mobile applications using Swift, SwiftUI and UIKit.
What I'm looking for
I have worked on large-scale production apps at leading companies, primarily in fintech and consumer-focused domains. I also developed a Banking as a Service SDK.
I focus on clean architecture, security, and delivering high-quality user experiences.
Experience
Work history, roles, and key accomplishments
iOS Developer
DefineX
May 2024 - Present (1 year 8 months)
Designed Arabic-compatible iOS interfaces and implemented VIPER-based banking features including Apple Wallet, document scanning, biometric auth, and secure encryption for a UAE banking app; contributed to cryptocurrency trading integration and maintained code quality with SwiftLint.
iOS Developer
Beko
Aug 2023 - May 2024 (9 months)
Worked on the HomeWhiz smart home platform performing refactors, bug fixes, hotfixes and led architectural migration from MVC to MVVM to improve stability and scalability in a global consumer product.
iOS Developer
Enerjisa
Jun 2022 - Aug 2023 (1 year 2 months)
Contributed to a mobile refactor using MVVM and VIPER, integrating Firebase, Lottie and Alamofire to improve app stability and UX; app reached #3 in Utilities and maintained a 4.7/5 rating from 10,000+ reviews.
iOS Developer
Neon Apps
Dec 2021 - Jun 2022 (6 months)
Maintained and improved over 10 native iOS applications within a portfolio of 50+, delivering UI enhancements, bug fixes, and code quality improvements using UIKit and programmatic Auto Layout.
IT Assistant
Istinye University
Sep 2019 - Jun 2022 (2 years 9 months)
Supported reliable operation of classroom and lab computers, managed inventory systems and assisted the student card automation program to ensure continuous campus IT services.
Education
Degrees, certifications, and relevant coursework
Istinye University
Bachelor of Science, Software Engineering
2018 - 2023
Completed a Bachelor of Science in Software Engineering with coursework and projects focused on software development and systems implementation.
Istanbul University
Bachelor of Science, Management Information Systems
2020 - 2022
Completed a Bachelor of Science in Management Information Systems with studies in information systems and business-technology integration.
Availability
Location
Authorized to work in
Social media
Job categories
Skills
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