PushKit is a separate push framework for a small set of high-urgency, non-UI push types — VoIP being the canonical one.

A notification is an OS-mediated message surface: the operating system — not your app — renders a piece of content on behalf of your app, outside of your app's own UI.

A production-grade study of local and push notification architecture across Android, iOS, macOS, the web, and Windows.

A real-time emergency coordination platform that enables control room operators, responders, and citizens to stay synchronized through live incident tracking, status updates, location monitoring, and event-driven communication.

A large enterprise struggled with scattered documentation, slow information retrieval, and repeated employee support requests.

A real-time voice changer Android app built using FFmpeg, libmp3lame, and SoundTouch, enabling live audio effects, pitch/tempo modification, and high-quality MP3 output with low latency.

A real-time image filtering engine built using OpenGL ES shaders for high-resolution photos and live camera feeds, delivering low-latency processing and smoother UI performance.

A complete Android performance optimization project including app size reduction with ProGuard/R8, faster startup using profiling, optimized RecyclerView with DiffUtil/pagination, and memory leak resolution using LeakCanary.

A multi-process Android architecture using AIDL, bound services, and background processes to isolate heavy tasks, reduce UI lag, and improve overall app performance and stability.

A robust rate-limiting and API throttling system using NGINX, Kong Gateway, Fail2ban, and custom logic to protect backend services from abuse and stabilize performance under high traffic.