Senior iOS Developer

Reviewed and analyzed a legacy Objective-C codebase. Updated the application to align with newer iOS platform requirements. Worked on Apple's Privacy Manifest compliance for third-party SDKs and application dependencies. Investigated deprecated APIs and compatibility issues introduced by recent iOS releases. Fixed bugs and improved application stability. Collaborated with the client to assess modernization priorities while preserving the existing OpenGL rendering engine. Performed testing and validation to ensure changes did not impact core application functionality.

Providing contract-based iOS development and modernization services to international clients.Delivered structured refactoring and architectural redesign, improving application scalability and reducing technical debt by ~25%. Integrated AI-driven capabilities including image recognition, intelligent filtering, and API- based AI services, increasing feature automation efficiency by ~30%. Designed modular and reusable networking layers, reducing API integration time for new features by ~20%. Improved application stability and runtime performance by 15–20% through profiling, memory optimization, and concurrency improvements.

Led development and modernization of multiple production iOS applications serving active user bases across consumer and service domains. Led iOS development for 3 production-grade applications (Dately, Localily, ChatMD) with complex and long-running codebases. Reduced recurring production bugs by 40% through modular refactoring and systematic debugging practices. Migrated large-scale Objective-C & UIKit modules to Swift & SwiftUI, reducing technical debt by 30%. Designed and implemented MVVM & Clean Architecture patterns, decreasing regression issues by 25%. Improved app performance and memory efficiency by 20% through profiling and optimization. Mentored and guided 4 junior engineers, increasing overall team productivity by 30%. Collaborated closely with product managers, backend engineers, and QA teams in distributed remote environments. Improved release stability and reduced hotfix frequency through structured testing and architectural improvements.

Worked on cybersecurity automation and endpoint security validation systems. Apr 2015 - Oct 2016 Automated 100+ security test cases, improving execution efficiency by 30%. Increased testing coverage by 25% using VM-based environment simulations. Contributed to validation of IDS systems and encrypted database mechanisms (SQLCipher-based systems). Resolved complex technical issues, reducing test instability and improving reliability.

Designed and developed new iOS applications using UIKit and Objective-C. Maintained and stabilized existing applications through bug fixes and performance improvements. Improved overall app stability by approximately 15% through systematic debugging and refactoring. Collaborated with designers and QA to deliver reliable feature updates.

Improved app performance by 20% through memory optimization and UI responsiveness enhancements. Accelerated development timelines by 25% via architectural cleanup and modern framework integration. Maintained and enhanced production applications across multiple client projects.

Developed and maintained native iOS applications with measurable performance improvements. Enhanced reliability and responsiveness of apps by 30% through structured debugging and optimization. Collaborated with cross-functional teams to deliver stable production releases.

Developed web crawlers and data extraction systems, improving structured data accuracy by 20%. Increased scraping and data processing efficiency by 15% across Kyaak and Kyrus projects. Contributed to backend system improvements supporting large-scale data pipelines.