Qi Chen
Specialist in Linux Kernel Instrumentation and Real-Time Architecture. Proven track record of solving "Black Box" integration challenges through reverse engineering and driver-level optimization. Expert in reducing system latency (70%) and architecting self-healing IPC mechanisms for mission-critical hardware environments.
Professional Experience
Core Architect for a proprietary Hardware-in-the-Loop (HIL) simulation platform, replacing a commercial vendor solution.
1. Proprietary Engine (Reverse Engineering)
Designed a kernel-level probe by modifying FPGA Drivers to intercept ioctl calls. Reverse-engineered the undocumented "Black Box" scheduling logic of the legacy vendor system. Delivered a proprietary engine that outperformed the commercial vendor, reducing signal jitter by 40%.
Deep Dive: Reverse Engineering Protocol2. Performance Optimization (230us Latency)
Diagnosed a "Temporal Coupling" bottleneck where Worst-Case Execution Time spiked to 800us. Re-architected the IPC layer using POSIX Message Queues to decouple network I/O from critical paths. Smashed the barrier to ~230us (38% faster than industry standard), increasing signal capacity by 400%.
Deep Dive: Breaking the Latency Barrier3. Stability & Testing Evolution
Eliminated "Silent Crashes" by migrating from fragile SSH tunneling to a robust Linux System V Daemon managed via Thrift RPC. Designed the SDK as a 100% Drop-in Replacement for the legacy API. Enabled hybrid automated testing, slashing regression cycles from 2 weeks to ~5 hours (98% efficiency gain).
Deep Dive: Zero-Crash ArchitectureTechnical Expertise
- System Internals: Deep understanding of Linux Kernel Modules, System V IPC (Shared Memory, Msg Queues), and Preempt-RT scheduling policies.
- Architecture: Experience designing decoupled, self-healing distributed systems using RPC (Apache Thrift) and Daemon management.
- Protocols: Proficient in Google Protobuf, TCP/UDP Socket Programming, and low-level driver interfaces.