KHASAN ABDULLAEV

Led iOS development for fintech and real-time messaging applications, owning technical direction, architecture decisions, and code quality across multiple product domains. Designed and built MVP architectures from scratch using Clean Architecture and MVVM, defining module boundaries, navigation flows, and dependency injection strategy. Implemented a shared authentication module (internal iOS SDK) used across multiple apps, standardizing authentication flows, token management, session handling, and secure storage. Built modular, reusable architectures to support long-term product evolution. Collaborated with product managers, UX/UI designers, backend engineers, and QA to translate business, security, and regulatory requirements into reliable technical solutions aligned with the roadmap. Built and maintained secure networking layers, including authentication flows, API versioning, error mapping, and retry strategies. Integrated real-time messaging and in-app customer support chat. Define

Maintained and enhanced iOS features for security and privacy applications, improving user experience, performance, and overall stability. Optimized memory usage and networking, achieving faster load times and reduced crash rates. Implemented unit, UI, and integration testing strategies to reduce regressions and raise release confidence. Identified and fixed memory leaks using Instruments (Leaks, Allocations, Memory Graph) by resolving retain cycles and lifecycle issues. Achieved up to 40% faster load times and 30% crash rate reduction, contributing to more stable long-session usage. Improved team productivity and code quality by ~25% and reduced long-term maintenance overhead by ~20%.