Become a senior software engineer with a job guarantee — Learn the system-design foundations—servers, databases, vertical vs horizontal scaling, load balancers, health checks, and SPOFs—so you can answer like a senior and pass the system-design interview rounds. 🔖 Sections 0:00 Introduction 0:50 Single Server Setup 6:03 Exercise: Setting up a Single Server 18:09 Databases 24:30 Vertical vs. Horizontal Scaling 29:32 Load Balancing Algorithms 36:14 Load Balancer Health Checks and Examples 39:06 Single Point of Failure 43:05 Exercise: Setting up a Load Balancer