Sergii Lieskov

iOS Developer with a demonstrated history of working in the computer software industry. Skilled in iOS, Management, iOS Development and Strategic Planning. Strong engineering professional with a Engineer's degree focused in Applied Mathematics from Kharkiv National University of Radioelectronics.

• Over 7 years of experience developing innovative iOS apps in Swift.
• Solid understanding of the full mobile development lifecycle, including architecture, design patterns, best practices, and CI/CD and app store deployment.
• Deep knowledge of system frameworks like CoreData, ARKit, SceneKit, Core Animation, Core Graphics, AV Foundation, MapKit, Core Location, UIKit, Cocoa Touch, Vision, Metal, etc.
• Experience with 3-rd party libraries such as Agora, AWS AppSync GraphGL, Amplify, Vuforia, Facebook, Firebase, Google Maps API, Alamofire, etc.
• Experience in developing VPN apps with ikev2, openVPN, wireGuard protocols
• Extensive use of design patterns such as VIPER, MVP, MVC, MVVM, etc.
• Experience with functional programming using Combine and SwiftUI.
• Dependency management using Swift Package Manager and CocoaPods.
• Daily use of tools: SourceTree, Git, JIRA, Confluence, Asana, Bitbucket.
• Implementation of user interfaces based on UI/UX specifications using Figma and Zeplin.
• Familiar with agile Scrum & Kanban methodologies.
• Solid understanding of RESTful API design and JSON.
• Additional experience with Jenkins, bash, shell, Perl, SQL.
• Excellent problem-solving skills and a strong attention to detail.
• Exceptional communication and collaboration skills, both verbal and written, with the ability to communicate effectively with team members and stakeholders.

Master of Applied Mathematics at KNURE | Kharkiv, Ukraine