Serhiy – Swift, Objective C, Kotlin, experts in Lemon.io

Serhiy

From Ukraine (UTC+3)flag

Mobile Developer|Senior

Serhiy – Swift, Objective C, Kotlin

Serhiy is an iOS developer with around 6 years of commercial experience, skilled in building and maintaining mobile applications across various domains. He is experienced in UIKit, SwiftUI, and core iOS frameworks, with a focus on delivering functional, well-structured, and maintainable solutions. Serhiy is proficient in handling complex features, UI development, and performance improvements while taking ownership of projects from development to release.

7 years of commercial experience in
Food and beverages
Healthcare
Pet care
Social services
Mobile apps
Platforms
Main technologies
Swift
6 years
Objective C
7 years
Kotlin
3 years
Additional skills
Java
Firebase Cloud Messaging
Firebase
REST API
Lottie
SwiftUI
UIKit
Cocoa
Foundation
SwiftLint
MapKit
ARKit
Moya
Alamofire
RxSwift
XML
Unit testing
Stripe API
MVC
MVVM
MVP
Realm
Core Data
Git
Trello
Asana
Jira
Android
Jetpack Compose
XCTest
AWS
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Experience Highlights

iOS & Android Developer
Jul 2021 - Ongoing5 years 1 month
Project Overview

About the project: The application is for fully devoted followers of Christ, where they can find audio and video messages from pastors, check in to the church, invite friends, and track their progress also, you can connect with your campus and stay up to date and more.

Responsibilities:
  • Completed an app redesign;
  • Implemented the app-required functionality (e.g., giving screen, locations - screen, payment methods screen, payment details, custom number keyboard, and more);
  • Completed UI development using UIKit & SwiftUI, and Jetpack Compose for Android;
  • Developed animations;
  • Provided bug fixing, code refactoring, and functionality improvements;
  • Did performance improvements;
  • Developed App Clip;
  • Implemented Rich Push Notification;
  • Completed UI/Unit testing.
Project Tech stack:
Swift
SwiftUI
Alamofire
SwiftLint
Stripe API
Unit testing
RxSwift
Kotlin
Jetpack Compose
iOS Developer
May 2021 - Sep 20221 year 3 months
Project Overview

The US-based start-up for online workouts, with unique plan personalization for each user. The service provides the ability to find a unique workout that suits you. During your workout, you can see statistics from your smartwatch on the screen, allowing you to monitor your workouts and keep track of your body. There is also the option to filter by duration, level, and intensity, which makes the app accessible to all people.

Responsibilities:
  • Completed development from scratch;
  • Implemented app-required functionality(e.g., hints screen, etc.);
  • Developed UI using UIKit;
  • Developed animations;
  • Completed code reviews and bug fixing.
Project Tech stack:
Swift
UIKit
Firebase
SwiftLint
SwiftGen
iOS Developer
Aug 2021 - May 20229 months
Project Overview

This is the Pet Tech Solution for dog owners to find someone reliable, flexible & professional to look after their best friend! The Dogiz helps dog owners connect with the best, most professional pet care services in their area.

Responsibilities:
  • Implemented of app-required functionality (e.g., walking service screen, summary screen, inbox screen, etc.);
  • Developed UI using UIKit;
  • Developed animations;
  • Released the app to the App Store/TestFlight and also to the Firebase.
Project Tech stack:
Swift
UIKit
Firebase
MapKit
Core Location
SwiftLint
iOS developer
Dec 2020 - Jun 20215 months
Project Overview

Berry Go is an application for posting, sharing, and finding fruits with reference to the location on the map, and also it allows leaving fruits feedback.

Responsibilities:
  • Completed development from scratch;
  • Established an app architecture;
  • Networked layer development using URL Session;
  • Implemented refresh token logic;
  • Developed UI using UIKit;
  • Implemented app-required functionality(e.g., sign-in screen, fruits list screen, search fruits screen, fruits details screen, review screen, etc.);
  • Completed code review and bug fixing;
  • Released the app to the App Store/TestFlight and also to the Firebase.
Project Tech stack:
Swift
UIKit
Firebase
MapKit
Core Data
Core Location

Education

2015
Mechanical Engineering
Master's

Languages

English
Advanced

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