Become a Senior Software Engineer with a Job Guarantee: Sections 0:00 Introduction 2:28 Single Server Setup 6:35 Databases: SQL, NoSQL, Graph 12:55 Vertical vs Horizontal Scaling 15:45 Load Balancing 24:31 Health Checks 27:23 Single Point of Failure (SPOF) 31:03 API Design 47:20 API Protocols 59:13 Transport Layer: TCP, UDP 1:04:25 RESTful APIs 1:19:07 GraphQL 1:24:55 Authentication 1:30:37 Authorization 1:41:19 Security