I'm Behran Kankul, a senior iOS developer with 12+ years of experience building native iOS apps using Swift, SwiftUI, and Objective-C. I lead distributed teams across time zones, mentor engineers, and focus on performance optimization, architecture, and reliable delivery in high-traffic apps. I enjoy clean architectures like MVVM, VIPER, and Clean Swift, and I explore AI-assisted workflows for modular migrations. I'm the founder of CoinInsight and Svayp, and I continue to ship products that blend solid engineering with great user experience.…

Behran Kankul

I'm Behran Kankul, a senior iOS developer with 12+ years of experience building native iOS apps using Swift, SwiftUI, and Objective-C. I lead distributed teams across time zones, mentor engineers, and focus on performance optimization, architecture, and reliable delivery in high-traffic apps. I enjoy clean architectures like MVVM, VIPER, and Clean Swift, and I explore AI-assisted workflows for modular migrations. I'm the founder of CoinInsight and Svayp, and I continue to ship products that blend solid engineering with great user experience.…

Available to hire

I’m Behran Kankul, a senior iOS developer with 12+ years of experience building native iOS apps using Swift, SwiftUI, and Objective-C. I lead distributed teams across time zones, mentor engineers, and focus on performance optimization, architecture, and reliable delivery in high-traffic apps.
I enjoy clean architectures like MVVM, VIPER, and Clean Swift, and I explore AI-assisted workflows for modular migrations. I’m the founder of CoinInsight and Svayp, and I continue to ship products that blend solid engineering with great user experience.

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Skills

Experience Level

Swift
Expert
Objective-C
Expert
C#
Expert
Javascript
Expert
PostgreSQL
Expert
Socket.IO
Expert
Python
Intermediate
Android
Intermediate
MongoDB
Intermediate

Language

Turkish
Fluent
English
Advanced

Work Experience

iOS Team Leader at Mackolik
June 1, 2023 - Present
Mentoring team members through code reviews and active mentoring for Mackolik, MatchEnDirect and Sahadan apps. Contributing to internal coding standards and development practices as a team lead. Prioritized product backlog and monitored progress with product ownership. Delivered new features for the company's iOS native applications. Ensured compliance with source control and versioning guidelines. Achievements: Reduced app’s external dependencies by 10%. CPU consumption of our main screen was reduced by 25%, which is heavily dependent on information from socket connection. Increased test coverage from 5% from 15%.
Senior iOS Developer at Mobven
January 1, 2023 - June 1, 2023
Managed iOS applications for Yap i Kredi and Eximbank.
Senior iOS Developer at hiBooks UK
January 1, 2020 - December 1, 2022
Managed iOS application using Swift and SwiftUI. Achievements: Reduced project dependencies (like Alamofire and PureSwift) with my own solutions for networking and UI building. Increased test coverage from 20% to 35%. 25% of the project has been converted to SwiftUI including custom color picker and camera library.
Senior iOS Developer at Turkcell
September 1, 2018 - December 1, 2019
Optimized and transformed codebase from Objective-C to Swift. Developed new features for the BiP Messenger app, increasing platform efficiency. Achievements: Created a new UI generation library called RacoonKit which is similar to PureLayout for this application in order to increase efficiency to develop new screens.
Senior iOS Developer at KG Technology
August 1, 2017 - September 1, 2018
Maintained BeIN Connect, BeIN Sports, Digiturk Play for BeIN Group.
Senior iOS Developer, FullStack C# Developer at DonanimHaber
June 1, 2016 - July 1, 2017
Developed both new REST API based on ASP.NET MVC and iOS application. Achievements: Created a small JS library for image gallery script with vanilla JS similar to PhotoSwipe library.
Senior iOS Developer, FullStack C# Developer at Katu Software
January 1, 2013 - December 1, 2015
Maintained REST APIs and iOS applications using C# and Objective-C.
Founder at CoinInsight
October 1, 2023 - Present
Developed a complete software solution including server, database, API, website, iOS and Android app.
Co-Founder at Svayp
February 1, 2022 - Present
Developed iOS application using SwiftUI and UIKit. Achievements: Created a unique swipe animation for voting that works seamlessly with SwiftUI.
iOS Team Leader at Mackolik (Mackolik, MatchEnDirect, Sahadan)
June 1, 2023 - Present
Designed and implemented an AI-assisted workflow to migrate legacy monolithic codebase to modern modular architecture, enabling faster refactoring and better maintainability. Led remote iOS team: code reviews, mentoring, architectural guidance for sports apps with millions of daily users. Reduced external dependencies by 10% and main screen CPU usage by 25% (socket-heavy) through optimized caching and data handling. Increased unit test coverage from 5% to 15%; established coding standards and best practices. Prioritized backlog, delivered features on time with product owners in multi-timezone setup.
Senior iOS Developer at Turkcell (BiP Messenger)
September 1, 2018 - December 1, 2019
Migrated legacy Objective-C to Swift; improved performance/maintainability. Built RacoonKit – lightweight UI layout library (like PureLayout) to speed up screen development.
Senior iOS Developer at KG Technology (BeIN Connect, BeIN Sports, Digiturk Play)
August 1, 2017 - September 1, 2018
Maintained streaming/media apps for BeIN Group.
Full-stack iOS + C# Developer at DonanimHaber, Bundle News, Katu Software
January 1, 2013 - December 1, 2017
REST APIs (ASP.NET MVC), iOS features, custom JS libraries (image gallery).

Education

Software Engineering at Bilge Adam Academy
January 1, 2011 - February 10, 2026
Civil Engineering at Kocaeli University
January 1, 2000 - January 1, 2006
Software Engineering at Bilge Adam Academy
January 1, 2011 - March 3, 2026
B.Sc. Civil Engineering at Kocaeli University
January 1, 2000 - January 1, 2006

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Media & Entertainment, Professional Services, Telecommunications
    paper Svayp

    Svayp app is designed to give people a platform to express their opinions on various topics and engage in meaningful discussions with others.

    I developed iOS application using SwiftUI.

    paper CoinInsight

    CoinInsight analyzes the price movements by examining the exchanges where cryptocurrencies are listed. After this analysis, it shares information with you about the direction of the movement. Additionally, it is an application that shares the direction predictions of users based on specific time intervals.

    https://www.twine.net/signin