Serge Moskalenko

serge.v.moskalenko@gmail.com    |   https://linkedin.com/in/sergemoskalenko/

Senior Software Developer | Tech Lead (AI, iOS, Android, macOS)
Kyiv, Ukraine (Ready for Remote/Relocation)

PROFESSIONAL SUMMARY

Innovative Senior Software Developer  and Tech Lead  with over 25 years of experience in software engineering. Expert in iOS (Swift/Objective-C) , Android (Kotlin) , and Cross-platform (Flutter/Dart)  development. Proven track record in integrating AI/LLM APIs, architecting complex mobile ecosystems, and leading engineering teams. Specialized in high-performance applications, legacy code modernization, and end-to-end project delivery.

TECHNICAL SKILLS

• Languages:  Swift, Kotlin, Dart, Objective-C, C++, PHP, SQL, JavaScript.
• Frameworks/Tools:  Flutter, SwiftUI, UIKit, Combine, RxSwift, CocoaTouch, AppKit (macOS).
• AI & Backend:  OpenAI API integration, Prompt Engineering, JSON/XML tech-prompts, REST API, Telegram Bot API, Firebase.
• Architecture:  MVVM, VIPER, Clean Architecture, Dependency Injection (Swinject), Unit Testing.
• Database & Storage:  Realm, SQLite, CoreData, Moya, Alamofire.
• Design & Collaboration:  Figma, Zeplin, Sketch, Git, CI/CD, Sentry, Stripe.

PROFESSIONAL EXPERIENCE

Tech Lead / Senior Mobile Developer   Confidential (EdTech & Service Apps)  | 04.2012 – Present

• AI Integration (FoxyLearn):  Architected an AI-driven learning platform using specialized JSON/XML prompt engineering and efficient request caching to optimize API costs and latency.
• Cross-Platform Leadership:  Developed and maintained multiple high-traffic apps using Flutter  and Native (Swift/Kotlin)  stacks, ensuring 99.9% crash-free sessions (Sentry).
• Internationalization:  Engineered the Tribu  app with complex dynamic localization (English, Arabic, Hebrew) and asynchronous UI rendering using Texture (AsyncDisplayKit).
• System Programming (WorkTime):  Developed a macOS monitoring agent using low-level ApplicationServices  and Accessibility API  for user activity tracking in legacy Objective-C.
• Security & Networking:  Implemented secure communication protocols using SocketRocket, XMPPFramework, and VPN technologies.

Lead iOS Developer   SOS Online Backup  | 01.2012 – 04.2012

• Architected the new version of the SOS-client  for iOS, focusing on secure cloud data synchronization and background upload stability.

Head of iOS Department   DarkJoker Games (Mail.ru Group)  | 12.2010 – 12.2011

• Managed a team of developers to produce high-performance gaming applications ( TimeQuest II ) using Objective-C++ and Cocoa Touch.
• Optimized memory management and rendering cycles for early iPad/iPhone hardware.

Mac OS X Developer / Team Member   Software MacKiev  | 2004 – 2008

• Contributed to world-renowned macOS software suites.
• Responsible for automating iterative development processes and porting legacy systems to macOS X.

SELECTED PROJECTS (App Store & Google Play)

• AI/EdTech:  [FoxyLearn] – AI-powered learning.
• Healthcare, Social: Case Drive – Secure Knowledge Vault & Healthcare Community.
• FinTech/PropTech:   Garentii  – Tenant management system.
• Privacy:   Volta VPN  – Secure networking.
• Social: Tribu – Community and communication tools.
• more links…

EDUCATION & CERTIFICATIONS

• M.S. in Physics  | Taras Shevchenko National University of Kyiv (1983 – 1990)
• Certification:  Porting Software and Games to Mac OS X (2004)

LANGUAGES

• English:  Intermediate (Technical/Professional communication)
• Ukrainian, Russian:  Native/Fluent