Stateful Web Apps with Elixir and Phoenix

Modern web users expect instant, interactive experiences, but traditional stateless architectures often fall short under heavy traffic. By leveraging the concurrent power of the Erlang virtual machine, Elixir and the Phoenix framework allow you to build robust, stateful applications that maintain persistent connections with ease. This course guides you from the fundamental principles of concurrency to deploying responsive, real-time web systems. You will transition from writing basic backend code to managing complex, multi-user state in real-time. Through structured written lessons, you will learn how to handle thousands of simultaneous connections without sacrificing performance or system reliability. What you'll learn: - Understand the core concepts of Elixir concurrency, including processes, OTP behaviors, and GenServers - Configure Phoenix Channels to establish and manage persistent, bi-directional WebSocket connections - Manage application state safely across multiple concurrent users without race conditions - Implement modern PubSub patterns to broadcast real-time updates instantly to connected clients - Apply basic testing strategies for stateful processes and real-time communication flows - Design resilient systems that automatically recover from failures using supervision trees The course begins with foundational definitions of state and concurrency, ensuring you understand the mechanics of Elixir before moving into Phoenix Channels and real-time architecture. You will then explore practical implementation patterns, structured step-by-step through written explanations and clear code examples. This course is designed for web developers, backend engineers, and programming enthusiasts who are new to Elixir and Phoenix. No prior experience with functional programming or real-time systems is required. Start reading today to unlock the power of real-time, stateful web development with Elixir and Phoenix.