Qi Chen

System Software Engineer

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

System Software Engineer (HIL) 2021 – 2024
Hirain Technologies

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 Protocol
2. Performance Optimization (230μs Latency)
Diagnosed a "Temporal Coupling" bottleneck where Worst-Case Execution Time spiked to 800μs. Re-architected the IPC layer using POSIX Message Queues to decouple network I/O from critical paths. Smashed the barrier to ~230μs (38% faster than industry standard), increasing signal capacity by 400%.
👉 Deep Dive: Breaking the Latency Barrier
3. 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 Architecture

Technical Expertise