Dmitry is available for hire
Hire DmitryDmitry Nesterenko
Verified Expert in Engineering
iOS Developer
Tbilisi, Georgia
Toptal member since January 22, 2021
Bio
Dmitry has 10 years of mobile app development experience—five in Objective-C and five in Swift. He’s detail-oriented, carefully considering UX, architecture, and API design. His code is clean, maintainable, and follows SOLID principles. Dmitry also writes unit tests for core components to ensure stability and prevent bugs during future changes.
Portfolio
FoodTech Company
Swift, SwiftUI, Remote Work, Firebase, iPhone, Model View ViewModel (MVVM)
e-Legion
iOS, Swift, Remote Work, APNs, Firebase, iPhone, VIPER Architecture...
e-Legion
iOS, Swift, Apple Pay, Objective-C, Remote Work, APNs, Firebase, iPhone...
Experience
- Objective-C - 10 years
- iPhone - 10 years
- iOS - 10 years
- APNs - 10 years
- Swift - 8 years
- Firebase - 5 years
- SwiftUI - 3 years
- Apple Pay - 3 years
Preferred Environment
Swift, iOS, Apple Pay, APNs, iPhone, Remote Work, Firebase, Objective-C, RxSwift, SwiftUI
The most amazing...
...project I've participated in was the iOS app for mobile operator Tele2 with 2 million monthly active users.
Work Experience
iOS Developer
2021 - 2022
FoodTech Company
- Added support for Apple Pay as a part of the payment flow.
- Launched a major initiative to increase customer loyalty and payments returns.
- Covered business features with the unit and UI tests.
- Used A/B tests and feature toggles to control the feature rollout.
Technologies: Swift, SwiftUI, Remote Work, Firebase, iPhone, Model View ViewModel (MVVM)
Lead iOS Developer
2018 - 2021
e-Legion
- Developed an app for a mobile telecom company in Russia.
- Led a team of five iOS developers. I managed the task estimation, release builds, and relationships with other teams and the client.
- Integrated a library that allows users to scan identity documents to buy a SIM remotely without visiting the mobile operator's office.
Technologies: iOS, Swift, Remote Work, APNs, Firebase, iPhone, VIPER Architecture, Model View ViewModel (MVVM)
Senior iOS Developer
2016 - 2018
e-Legion
- Helped develop a fintech application that allows users to transfer funds and pay bills. Designed and developed the app's architecture. Configured CI using the Jenkins pipeline, Fastlane, and GitHub Actions.
- Profiled the application for memory leaks and crashes.
- Led the application through a security audit. Fixed issues related to the secure storage of users' personal and credit card data.
Technologies: iOS, Swift, Apple Pay, Objective-C, Remote Work, APNs, Firebase, iPhone, VIPER Architecture, Model View ViewModel (MVVM), RxSwift
iOS Developer
2017 - 2017
Nix (Beauty Fashion App)
- Fixed bugs and improved the overall stability of the application.
- Researched a framework that allows users to apply beauty masks and cosmetics in real time.
- Implemented new features for a beauty application based on a VIPER architecture.
Technologies: iOS, Swift, Remote Work, iPhone
iOS Developer
2013 - 2016
e-Legion
- Developed an app that provides a collection of video lessons for students on all kinds of curricula.
- Built a ride-hailing app for a local taxi provider.
- Researched AR frameworks that were available on the market at the time to decide which one to integrate into the application.
Technologies: iOS, iPad, Remote Work, iPhone, Swift
Experience
Tele2 Selfcare
The application that allows mobile operator subscribers to manage their accounts. They can also check their current balance and allowed services, refill balance, and update services.
The app uses Apple Pay, push notifications, a modern SwiftUI widget, and REST API.
I was the lead of the iOS development team, managing daily standup meetings, task estimation, sprint planning, and builds delivery.
The app uses Apple Pay, push notifications, a modern SwiftUI widget, and REST API.
I was the lead of the iOS development team, managing daily standup meetings, task estimation, sprint planning, and builds delivery.
Banking Application
An application for a Raiffeisen Bank client that allows clients to manage their accounts and cards, pay bills, and transfer funds.
I was responsible for the configuration and development of an Apple Pay functionality in the app.
I was responsible for the configuration and development of an Apple Pay functionality in the app.
Dylan's Candy Bar iOS App
https://www.dylanscandybar.comAn application that allows users to look through the selection of candies and candy-related gifts from around the world. The application is preinstalled on iPad devices located in stores.
The application provides a convenience text editor where users can design a label to be printed on their gift box.
The application provides a convenience text editor where users can design a label to be printed on their gift box.
Educational Video Project
The application provides a collection of educational video lessons for students on all kinds of curriculum. It is written in Objective-C and supports iPad devices and landscape orientation.
I've developed and supported the video player part of the application.
I've developed and supported the video player part of the application.
Education
2002 - 2007
Master's Degree in Computer Science
North-Caucasus Federal University - Stavropol, Russia
Certifications
JANUARY 2007 - PRESENT
UX Design
Usability Lab
Skills
Libraries/APIs
RxSwift
Languages
Swift, Objective-C
Paradigms
VIPER Architecture, Model View ViewModel (MVVM), UX Design
Platforms
iOS, Firebase
Frameworks
SwiftUI
Other
iPhone, iPad, Remote Work, Apple Pay, APNs, Software Engineering, User Experience (UX)
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