What if the difference between a lab prototype and a production BCI system came down to software architecture choices? Brain-computer interfaces have escaped the research lab. EEG wearables now stream neural data in real time. The hardware works. The algorithms converge. Yet most engineering teams still wrestle with fragile signal pipelines, inconsistent APIs, and compliance deadlocks that stall deployment. This book changes that. Inside, you will learn how Structure EEG signal processing pipelines using modular design patterns that scale from bench prototypes to FDA-registered devicesBuild attention-tracking APIs that survive real-world noise, motion artifacts, and sub-100ms latency requirements without accuracy collapseIntegrate flexible electrode arrays with embedded systems through fault-tolerant communication protocols and predictive power managementEngineer data isolation layers that safeguard raw neural signals while exposing clean cognitive metrics to downstream applicationsNavigate Class II device regulations and EU MDR requirements using documented design controls that satisfy auditorsOptimize continuous monitoring for 24/7 consumer use through adaptive sampling and edge-processing strategiesImplement version-controlled prompt templates for AI-assisted artifact rejection that maintain full traceabilityThis is not theoretical neuroscience. It is a technical manual for senior embedded engineers and software architects who must ship reliable neurotechnology products. Every pattern maps to production code, every example addresses hardware constraints, every recommendation accounts for regulatory reality. Your expertise built the hardware. Now engineer the system around it.