Anton Rogachevskyi, Developer in Warsaw, Poland
Anton is available for hire
Hire Anton

Anton Rogachevskyi

Verified Expert  in Engineering

iOS Developer

Location
Warsaw, Poland
Toptal Member Since
August 2, 2022

Anton is an iOS developer with about 16 years of development experience, including seven years of intensive iOS work. His favorite domains are fintech, edutech, and social networking. Anton is good at problem-solving and can easily set up your project from scratch.

Portfolio

Yahoo! – Sports
iOS, Swift, Objective-C, Amazon Web Services (AWS), PhotoKit...
AB Volvo
Swift, Objective-C, APIs, UIKit, GitHub, Git, Mobile Apps, iOS SDK, Mobile GPS...
Banco Santander
Swift, SwiftUI, APIs, UIKit, GitHub, Git, Mobile Apps, Firebase, iOS SDK...

Experience

Availability

Full-time

Preferred Environment

Xcode, iOS, Swift, Mobile Applications, Mobile App Development, REST, API Integration, App Store, Mobile, Apps, Stripe, Python, User Interface (UI), Web UX, VPN, Multithreading, Testing, Version Control

The most amazing...

...thing I've done is develop the core features of the Yahoo Fantasy Sports mobile app. It's a popular USA fantasy sports app with over 3 million active users.

Work Experience

iOS Developer

2022 - 2023
Yahoo! – Sports
  • Developed core features of the high-loaded iOS fantasy sports application with a 12+ million active user base.
  • Managed release and app rollout processes, including crash reports monitoring and patch releasing.
  • Moved a huge Objective-C codebase into Swift, upgrading the code and covering the app with unit tests. Increased test coverage by 5%.
Technologies: iOS, Swift, Objective-C, Amazon Web Services (AWS), PhotoKit, User Interface (UI), Security, Local Data Persistence, Networks, Multithreading, SDKs, UI Testing, Testing, Version Control

Senior iOS Developer

2021 - 2022
AB Volvo
  • Made a security review of 20+ Volvo applications. Fixed critical security issues.
  • Met project deadlines and 97% of goals, which is the best result among all the review teams in the company.
  • Led several integration processes with 3rd party services. Built an application map layer based on those integrations.
Technologies: Swift, Objective-C, APIs, UIKit, GitHub, Git, Mobile Apps, iOS SDK, Mobile GPS, CocoaPods, JSON, Mobile Development, Core Data, Xcode, iOS, iOS Frameworks, REST APIs, RxSwift, Async/Await, Mobile Applications, Mobile App Development, REST, Auth, API Integration, TestFlight, App Store, Mobile, Apps, iTunes Connect, Model View ViewModel (MVVM), Figma, iOS Native Libraries, PhotoKit, iCloud, Nearby Interaction, User Interface (UI), PSD to Swift, Instant Messaging, Application Security, Security, Keychain, SSL, SSL Certificates, Local Data Persistence, Networks, Multithreading, SDKs, Testing

Senior iOS Developer

2020 - 2021
Banco Santander
  • Built an instant payment module for a bank enterprise application with over one million active users.
  • Built a module-based application architecture that enabled working on the same codebase with 15 developers at a time.
  • Increased the application unit tests coverage from 60 to 85%.
Technologies: Swift, SwiftUI, APIs, UIKit, GitHub, Git, Mobile Apps, Firebase, iOS SDK, CocoaPods, JSON, WatchOS, Apple Pay, Mobile Development, Core Data, Xcode, iOS, iOS Frameworks, REST APIs, RxSwift, iPad, Mobile Applications, Mobile App Development, REST, Auth, API Integration, RealmSwift, TestFlight, App Store, Mobile, Apps, iTunes Connect, Model View ViewModel (MVVM), Figma, iOS Native Libraries, WebView, Swift 4, Augmented Reality (AR), User Interface (UI), Application Security, Security, Keychain, Local Data Persistence, Networks, Multithreading, SDKs, Testing, Version Control

Senior iOS Developer

2018 - 2020
Welltory
  • Built a core data-transport module of a health care application with over one million active users. Did the cross-platform module with three different technologies, C++, Swift, and JavaScript.
  • Led the third-party company integration process, using Calm and Bitrix. Implemented integrations based on deep links and SDKs.
  • Led the application release process. Built a release step-by-step documentation and some automations.
Technologies: iOS, Objective-C, JavaScript, C++, SwiftUI, APIs, SQL, UIKit, Git, Mobile Apps, iOS SDK, Mobile GPS, CocoaPods, JSON, Bluetooth, WatchOS, Mobile Development, Core Animation, Xcode, Swift, iOS Frameworks, REST APIs, Mobile Applications, Mobile App Development, REST, Auth, API Integration, AudioKit, TestFlight, App Store, Mobile, Apps, iTunes Connect, Model View ViewModel (MVVM), iOS Native Libraries, CouchDB, WebView, Internet of Things (IoT), PhotoKit, Swift 4, User Interface (UI), PSD to Swift, Keychain, Local Data Persistence, Multithreading, SDKs, Testing, Version Control

Senior iOS Developer

2017 - 2018
Chummy
  • Built core features as a solo developer. Developed the social networking iOS applications, such as map, chat, and user connections.
  • Rewrote Objective-C modules into Swift. Covered 80% of the application with unit tests.
  • Split the iOS application into module architecture. Resulted in the build time being reduced by 70%.
Technologies: Swift, Objective-C, APIs, SQL, UIKit, Git, Mobile Apps, Firebase, iOS SDK, Mobile GPS, CocoaPods, JSON, Mobile Development, Xcode, iOS, iOS Frameworks, REST APIs, Mobile Applications, Mobile App Development, REST, API Integration, RealmSwift, App Store, Mobile, Apps, Model View ViewModel (MVVM), Figma, iOS Video, iOS Native Libraries, WebView, Swift 4, User Interface (UI), Instant Messaging, XMPP, Multithreading, Testing

Senior iOS Developer

2015 - 2017
BestWallet
  • Built a white-label mobile banking iOS application. Integrated into 12 banks and financial structures.
  • Led as a technical leader of the integration processes with end banks.
  • Wrote and maintained system and application documentation for both the user and developer end.
Technologies: iOS, Objective-C, Swift, APIs, UIKit, GitHub, Git, Mobile Apps, iOS SDK, CocoaPods, JSON, Mobile Development, Core Data, Xcode, Mobile Applications, Mobile App Development, REST, Auth, API Integration, Mobile, Apps, Keychain, Testing

Senior Mobile Developer

2013 - 2015
Dacadoo
  • Developed a Blackberry application of the company's sport-tracker service.
  • Worked as the lead team member of an iOS team. Made low-power Bluetooth integrations with devices and monitors.
  • Led and completed an integration process with third-party services based on RESTful APIs.
Technologies: iOS, Objective-C, Java, BlackBerry, APIs, SQL, UIKit, GitHub, Git, Mobile Apps, Firebase, iOS SDK, Mobile GPS, CocoaPods, JSON, Bluetooth, Mobile Development, Xcode, PHP, Mobile Applications, Mobile App Development, REST, API Integration, Mobile, Apps, Model View ViewModel (MVVM), Networks, Testing

Senior J2ME and Blackberry Developer

2009 - 2013
MusicQubed
  • Developed a music streaming application for J2ME mobile devices.
  • Developed a music streaming application for Blackberry mobile devices. Built a custom sound equalizer system.
  • Worked with media streams, in-app audio, news processing, and music chart building.
Technologies: J2ME, Java, APIs, Git, Mobile Apps, JSON, Mobile Development, Xcode, Mobile Applications, Mobile App Development, Mobile, Apps, Networks

Software Developer

2006 - 2009
JSC CB Hypobank
  • Developed mobile-banking applications for Windows mobile and Java embedded devices.
  • Built the client-side application of a bank remote service point (self-service ATM) based on ASP.NET tech.
  • Collaborated with a team that built Ukraine's first bank business process automation system.
Technologies: C++, J2ME, ASP.NET, Borland C, SQL, Mobile Apps, XML, Mobile Development, PHP, Apps

Fitness Application for the "Nowafit" Project

Developed Android and iOS fitness applications that help users to be fit and healthy. The application creates a unique HIIT training daily and leads the user, showing how to do specific exercises in real time.

Libraries/APIs

CocoaPods, REST APIs, Auth, iOS Native Libraries, PhotoKit, Shopify API, Core Animation, Camera API, RxSwift, AudioKit, Stripe

Tools

Xcode, GitHub, Git, iTunes Connect, Figma, WebView, Borland C, TestFlight, VPN

Frameworks

UIKit, iOS SDK, Core Data, iOS Frameworks, SwiftUI, Yii 2, Vapor, RealmSwift, ASP.NET, Android SDK

Languages

Swift, Objective-C, PHP, Swift 4, SQL, XML, JavaScript, C++, Java, Python

Paradigms

Mobile Development, REST, Model View ViewModel (MVVM), Testing

Platforms

iOS, J2ME, Mobile, Keychain, BlackBerry, Firebase, WatchOS, iCloud, Amazon Web Services (AWS)

Storage

JSON, MySQL, CouchDB, Couchbase

Other

APIs, Mobile Apps, Mobile GPS, Apple Pay, iPad, Mobile Applications, Mobile App Development, API Integration, App Store, Apps, User Interface (UI), Application Security, Security, Local Data Persistence, Networks, Multithreading, SDKs, Bluetooth, Async/Await, iOS Video, Full-stack, QR Codes, Internet of Things (IoT), PSD to Swift, Instant Messaging, SSL, SSL Certificates, Version Control, Nearby Interaction, Augmented Reality (AR), Web UX, XMPP, UI Testing

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

1

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring