About the role

Senior Mobile Systems Engineer focusing on iOS at Magnet Forensics, responsible for system engineering for the Graykey product across multiple platforms.

Responsibilities

Lead design and implementation of complex mobile platform integrations across the Graykey product.
Debug hard problems that span multiple layers: Python, native C/C++, and mobile OS userspace and kernel behavior.
Own root cause analysis on issues that require reading crash dumps, kernel panics, and disassembled binaries.
Drive implementation from design through system integration, testing, and production.
Mentor engineers on the team and help raise the technical bar through code review.
Collaborate with firmware, product, and other engineering teams across the company.

8+ years of professional engineering experience, with at least 4 years working at the iOS platform layer.
Experience with cross-compilation toolchains and embedded build systems targeting ARM64.
Comfortable debugging remote devices and reading crash dumps and core files.
Strong with git and senior-level code review workflows.
A-series/M-series SoC architecture: AP/SEP boundary, iBoot, DFU, restore mode.
XNU kernel fundamentals: IOKit, kernel extensions, and how to actually debug at that layer.
Memory protection: ASLR, PAC, and PPL.
Code signing, entitlements, and the full trust chain.
Sandboxing, container isolation, and platform-level IPC.
Secure Enclave: its role in key management and where its boundaries are.
Data protection classes, file system encryption, and key derivation.
Keychain internals: what’s happening underneath the API.