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Ostap – iOS, Swift, SwiftUI, experts in Lemon.io

Ostap

From Ukraine (GMT+3)

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Mobile DeveloperMiddle-to-senior
Hire developer
11 years of commercial experience
Banking
Dating
Entertainment
Fintech
Music and audio
Social media
Telecommunications
Collaboration tools
Mobile apps
Lemon.io stats

Ostap – iOS, Swift, SwiftUI

Ostap is a Middle-to-Senior Mobile developer with 9+ years of commercial experience. He showcased good knowledge of Swift development and the main principles of memory management, concurrency and multithreading, and development in iOS. His experience includes working in Fintech, Telecommunications, Dating apps, and Management applications.

Main technologies
iOS
7 years
Swift
4 years
Additional skills
SwiftUI
Combine
Realm
RxSwift
Objective C
XCTest
Fastlane
CocoaPods
CocoaPods
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

Senior iOS Engineer (Squad Leader)
Sep 2022 - Ongoing1 year 11 months
Project Overview

An application that combines banking and telecom features. Introduces a digital card for users to make secure cashless payments and engage in various financial transactions. The telecom component facilitates easy information management and the creation of personalized tariffs in a user-friendly manner.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Led the development of a feature module, driving the successful implementation of key functionalities and enhancing the overall user experience;
  • Played a key role in splitting the application into two separate applications;
  • Implemented new features and designs, enhancing the functionality and user experience of the application;
  • Improved application performance by optimizing code and implementing efficient solutions;
  • Actively participated in code reviews, providing valuable feedback and suggestions to improve code quality and maintain consistency;
  • Collaborated with cross-functional teams to ensure seamless integration of new features and designs.
Project Tech stack:
SwiftUI
Swift
Combine
GitLab CI
CD
Fastlane
Lead iOS Engineer
Sep 2020 - Sep 20222 years
Project Overview

An app designed for a global telecom company operating on the mobile virtual network operator business model, offering services in numerous countries. Enables users to create accounts, oversee information, and purchase various plans and options for their accounts.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Designed and implemented custom UI elements and engaging animations, enhancing the visual appeal and user experience of the app;
  • Employed efficient techniques to optimize application performance, resulting in faster response times and improved user satisfaction;
  • Conducted thorough testing and debugging to identify and resolve any issues or bugs, ensuring a smooth and error-free user experience;
  • Actively participated in code reviews, providing valuable feedback and suggestions to team members.
Project Tech stack:
Swift
iOS
Core Data
XCTest
Fastlane
Senior iOS Engineer
May 2020 - Oct 20205 months
Project Overview

Social media application for creating, sharing, and discovering short videos. An additional feature was the ability to send private videos and add surprises to them (the application had a certain set of gifts to choose from).

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Developed custom UI elements;
  • Redesigned the existing app;
  • Created custom animations;
  • Implemented new features;
  • Implemented new design.
Project Tech stack:
iOS
Swift
Core Data
AVFoundation
Lead iOS Engineer
Oct 2019 - Apr 20205 months
Project Overview

An application for a company that develops and provides software for core banking. The application supports various banking activities such as news feeds, document sharing, order management and portfolio information services. Also, the application could be integrated with a client’s social messaging service, which then makes communication much easier.


Skeleton
Skeleton
Skeleton
Responsibilities:
  • Developed the application from scratch, implementing new features and custom UI elements, resulting in an intuitive and user-friendly interface;
  • Supported continuous integration and continuous deployment (CI/CD) processes;
  • Utilized Swift and CoreData to build a robust and scalable application;
  • Integrated the application with a client's social messaging service, streamlining communication and enhancing user convenience.
Project Tech stack:
Swift
Core Data
XCTest
Jenkins
Combine
sockets
XCFrameworks
iOS Engineer
Feb 2018 - Nov 20191 year 9 months
Project Overview

The payment application enables users to establish a payment account, oversee personal details, and review transactions through a centralized dashboard. Supported funding options presently encompass credit cards and bank accounts. Additionally, users can initiate various types of payments.

Skeleton
Skeleton
Skeleton
Responsibilities:
  • Developed and integrated new features for a payment application, enhancing its functionality and user experience;
  • Developed custom UI elements and animations, creating a visually appealing and user-friendly interface;
  • Implemented a proof of concept to explore new technologies;
  • Supported CI/CD processes, ensuring smooth and efficient deployment of updates and bug fixes.
Project Tech stack:
Swift
Kotlin
Realm
bundler
XCTest
xcuitest
Appium
Fastlane

Education

2015
Software engineering
Master's degree

Languages

English
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