Senior iOS / ARKit Expert Needed – Analyze & Fix Native App Crashes (Swift / Objective-C / C++)

We are looking for a highly experienced Senior iOS engineer to help us analyze and resolve several native crashes in our production iOS application. Our application uses a proprietary ARKit-based indoor positioning SDK (camera-based localization, computer vision, native iOS framework). Our internal developers have reached a point where we need an expert with deep experience in low-level iOS debugging. Current Issues The crashes occur inside our native SDK and include: * EXC_BREAKPOINT * BUG_IN_CLIENT_OF_LIBMALLOC * Pointer being freed was not allocated * Possible memory corruption * Possible race conditions / threading issues * Dispatch queue synchronization problems * Native crashes related to ARKit The crashes are reproducible through TestFlight crash reports. Your Tasks * Analyze TestFlight crash logs * Symbolicate crashes (dSYM files available) * Identify root cause(s) * Debug memory issues * Debug threading/race conditions * Review native SDK code * Propose and implement fixes * Validate fixes using Xcode Instruments Required Skills * Expert in iOS development * Swift * Objective-C / Objective-C++ * C++ * ARKit * Xcode Instruments * Address Sanitizer * Thread Sanitizer * Memory Graph Debugger * Crash symbolication * Experience debugging native memory corruption Experience with computer vision, SLAM, OpenCV or Metal is a strong plus. Nice to Have * Experience with computer vision * OpenCV * Metal * CoreVideo * AVFoundation * Camera pipelines * Large production iOS apps Deliverables * Root cause analysis * Explanation of every crash * Code fixes * Pull request (or patches) * Verification that crashes are resolved To Apply Please include: * Your experience debugging native iOS crashes * Examples of similar memory/threading issues you’ve solved * Experience with ARKit or computer vision applications * Your availability * Estimated time required