The Recommendation Engine That Changed the Internet -- ByteDance's Core Technical Competency

ByteDance's recommendation algorithm is arguably the most consequential piece of software in modern tech -- it made TikTok the fastest-growing app in history and is the foundation of every ByteDance product. This module covers how the algorithm works, the microservices architecture behind it, ByteDance's tech stack (Golang, Python, KiteX, CloudWeGo), and the scale challenges of serving personalized content to 1.6 billion users under 100ms latency. For engineering candidates, this is the technical depth that impresses interviewers.