Michael Sergeev Email & Phone Number

Novosibirsk, Novosibirsk Oblast, Ru

Novosibirsk, Russia

Project Overview: https://apps.apple.com/ru/app/elph/id1556376546 Developed a unified communications app for business with voice calls, video calls, and chat functionality. Team Size: 7 iOS developersResponsibilities:- Led development of key app features, conducted code reviews, and mentored junior developers.- Participated in technical interviews and maintained documentation and task management.- Collaborated with cross-functional teams to ensure seamless feature integration.Key Achievements:- Scalable Chat Service: Created a chat server communication service using URLSessionWebSocketTask and Combine, modularized into SPM packages.- Networking Layer: Developed a scalable networking layer with dataTaskPublisher and Combine, enhancing API interaction efficiency.- Data Caching: Implemented an end-to-end caching solution using SQLite and CoreData.- Combine Integration: Successfully transitioned the team from RxSwift to Combine, guiding them through the integration.- Push Notifications: Integrated UserNotification for push notifications and initiated a closed network notification system without APNs.- Logging System: Built a comprehensive event logging system using os and OSLog.- Secure Data Storage: Developed a scalable service for storing sensitive data in Keychain.- App Configuration: Refactored app configuration using AppAuth for OAuth2.0.- App Navigation: Configured app navigation with XCoordinator to support MVVM-C architecture.- Telephony Stability: Stabilized SIP-based user registration with PJSip.

Novosibirsk, Russia

Project Overview: https://apps.apple.com/ru/app/eltex-home/id123456789Smart device management app for Eltex and third-party devices, including Wi-Fi sockets, relays, leak detectors, smoke sensors, thermostats, cameras, and more.Team Size: 5 developersResponsibilities: - Developed the application, fixed bugs, and managed tasks.Key Achievements:- Camera Management Module: Developed a module for managing cameras, including adding, removing, and previewing.- Refactored Massive ViewController: Refactored a Massive ViewController with over 1200 lines of code.- Service Segregation: Improved code maintainability by creating separate services for responsibilities.- Custom UI Development: Implemented new screens and custom views.

Moscow, Russia

Project Overview: Developed a small application for determining tax rates for clients of an auditing firm (USA). Team Size: 3 developersResponsibilities: - Developed the application, fixed bugs, and managed tasks.Key Achievements: - UI Development: Designed and implemented graphical interfaces using UIKit with programmatic layout. - Network Layer Enhancement: Expanded network layer functionality for handling REST API requests. - Animation Development: Created animations for various scenarios and transitions within the app.

Bachelor Of Science - Bs, Informatics And Computer Technologies

Engineer'S Degree, Internal Combustion Engine