Okhan Okbay, iOS Developer in Manchester, United Kingdom
Okhan Okbay

iOS Developer in Manchester, United Kingdom

Member since March 17, 2022
Okhan is a senior iOS developer with over eight years of experience working through all fields of the iOS development ecosystem, from live location tracking on maps to real-time messaging apps. He has worked for various companies, including a $10 billion giant like Getir and an FTSE 100 company like Auto Trader UK. Okhan is keen on developing apps that provide the best user experience, positively impacting users' satisfaction and product growth.
Okhan is now available for hire


  • Auto Trader UK
    Xcode, Swift, Objective-C, GitHub API, Fastlane
  • Getir
    Swift, Objective-C, iOS, Software Architecture, Modular Programming...
  • Akbank
    Swift, iOS, Objective-C, Software Architecture, Protocol-Oriented Programming...



Manchester, United Kingdom



Preferred Environment

Xcode, GitHub, Fastlane, Swift

The most amazing...

...app I've worked on was Getir, which was initially launched as a local company in Turkey but then successfully grew into a multinational $10 billion decacorn.


  • Senior iOS Developer

    2021 - PRESENT
    Auto Trader UK
    • Contributed daily to the UK's unrivaled automotive advertisement application as a part of a big iOS team—even maintaining its stability is considered a daily success!
    • Integrated Github Actions for daily Firebase build distributions with the help of Fastlane's integral tools.
    • Introduced the VIPER architecture to the app to make it more testable and break the couplings.
    Technologies: Xcode, Swift, Objective-C, GitHub API, Fastlane
  • Senior iOS Developer

    2020 - 2021
    • Abstracted the payment layer acting as the central hub for millions of transactions.
    • Worked on the foundational structure of the Getir finance team.
    • Collaborated with the UI/UX designers and prevented faulty designs from coming to life by anticipating implementation issues due to third-party SDK restrictions.
    Technologies: Swift, Objective-C, iOS, Software Architecture, Modular Programming, Continuous Development (CD), Continuous Integration (CI), Protocol-Oriented Programming, APIs, Firebase iOS SDK
  • Senior iOS Developer

    2019 - 2020
    • Integrated in a big agile cross-functional team successfully.
    • Served millions of users in a billion-dollar company and released mission-critical features.
    • Worked on loan, wealth, and trader features and provided support to different teams as an on-demand developer.
    Technologies: Swift, iOS, Objective-C, Software Architecture, Protocol-Oriented Programming, APIs
  • Senior iOS Developer

    2018 - 2019
    • Developed a highly performant forum app, which uses all sorts of high-level concurrent programming capabilities.
    • Collaborated with two other iOS developers on the same screens without conflicts following protocol abstractions.
    • Logged non-fatal events to Firebase to get information about the soft errors occurring due to incorrect back-end responses.
    Technologies: Swift, Objective-C, iOS, Software Architecture, Modular Programming, Concurrent Programming, Protocol-Oriented Programming, APIs
  • Senior iOS Contractor

    2017 - 2018
    • Worked as a contractor and a lone iOS Developer of a small agile team and can thrive in that environment as well as I did in massive organizational structures.
    • Developed dependency injection, concurrency, socket servers' client implementations and tricky UI animations.
    • Downsized the socket server costs by nearly more than 30% of what was previously just by utilizing local storage. That kind of a save was crucial for a newly launched startup company.
    Technologies: Sockets, Objective-C, Software Architecture, Concurrent Programming, APIs, Firebase iOS SDK
  • iOS Developer

    2015 - 2017
    Wingie Enuygun Group
    • Migrated their Objective-C codebase into Swift and completed the full flight ticket booking app in 1.5 months.
    • Rewrote their hotel room booking app from scratch with RxSwift and MVVM.
    • Worked as the only iOS Developer in the company, managing all the end-to-end processes.
    Technologies: iOS, Swift, Objective-C, Xcode
  • iOS Developer

    2015 - 2015
    • Worked on well known brand apps like Coca-Cola, Nestle, and Total.
    • Re-wrote one of their key apps named Earthquake Notifier from scratch with Objective-C.
    • Gained familiarity with the naturally agile environment of digital agencies as part of a three-person iOS development team.
    Technologies: iOS, Objective-C, Xcode
  • iOS Developer

    2014 - 2015
    Asis Electronics
    • Worked on multiple cities' travel, live location tracking, and payment apps.
    • Had extensive experience with MapKit and Google Maps. Needed to dive deep into the technical limits thereof.
    • Learned the programming language details and developed the apps simultaneously, demonstrating my quick ability to adapt.
    Technologies: iOS, Objective-C, Xcode


  • Getir

    I collaborated in the design and development of Getir, a super-fast, on-demand delivery service app. It started as a local groceries app and evolved into a massive, multi-billion-dollar, multi-continent company less than five years after its launch. I participated in the process and realized how an organization could grow rapidly.

  • Auto Trader UK

    The UK's number one marketplace to buy a new or used car, with the largest choice of cars for sale. Thousands of retailers and millions of trusted users. A FTSE 100 company is one of the biggest 100 in the UK's market.

  • Akbank

    I worked on loan, wealth, and trader features and supported cross-functional teams at Akbank, a top-tier banking giant in Turkey that prioritizes agile practices and its tech stack. With millions of daily users and critical features running day and night, even a slight change required too many sanity checks, and I've learned how to deal with it at a massive organization.

  • Vampr

    Vampr is the number one social platform helping creatives and artists find people with whom to collaborate, create new music, and monetize their work—an essential network that grows with you every step of your journey.

  • Enuygun - Flight and Hotel

    Enuygun is Turkey's leading travel agency with millions of trusted users. It can be thought of as Skyscanner's Turkish version. Users can book flights and make hotel reservations. The user base has been growing rapidly since its first release.

  • DH | Tech News and Forum

    I started to work on a legacy codebase with two iOS developers, parsing different data types (images, videos, gifs, and emojis) and various text fonts and colors and chaining the messages into one another. It was all done natively as if we were creating an HTML parser with Swift, envisioning a complete user forum experience. We've also considered all the concurrency problems and even used dispatch barriers when needed.


  • Languages

    Swift, Objective-C
  • Tools

    Xcode, GitHub, Fastlane
  • Paradigms

    Protocol-Oriented Programming, Unit Testing, Clean Code, Concurrent Programming, Model View Viewmodel (MVVM), VIPER Architecture, Continuous Development (CD), Continuous Integration (CI), Dependency Injection
  • Platforms

    iOS, Firebase
  • Other

    Mobile Apps, APIs, Software Architecture, Modular Programming, GitHub Actions, Firebase Cloud Functions, Typhoon, Reactive Streams, UI Testing
  • Libraries/APIs

    Firebase iOS SDK, GitHub API, Socket.IO, RxSwift


  • Bachelor's Degree in Computer Engineering
    2012 - 2017
    Istanbul University - Istanbul, Turkey

To view more profiles

Join Toptal
Share it with others