Open to opportunities

Berkan Çalışkan

@berkan

iOS Developer with 4+ years of experience building scalable and secure mobile applications using Swift, SwiftUI and UIKit.

Turkey

Message

What I'm looking for

I am seeking iOS roles where I can build secure, high-quality mobile products, take technical ownership, work in cross-functional teams, and advance architecture and SDK development.

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

Current

iOS Developer

Current

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.

Swift UIKit VIPER DocumentReader SDK Biometrics CryptoSwift SwiftyRSA 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.

Swift MVVM MVC Refactoring Debugging Cross Functional Collaboration

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.

Stability Improvement Swift MVVM VIPER Firebase lottie Alamofire Stability Improvements

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.

Swift UIKit Programmatic Debugging Multi App Maintenance Release Management

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.

IT Support Inventory Management Student Card Systems Troubleshooting System Administration