Serverless offers scalability and reduced overhead but has hidden pitfalls like architectural traps, cost issues, debugging challenges, cold starts, and more. This talk explores these realities using real-world examples. Learn why infinite scalability isn't always achievable, how architecture changes impact costs, serverless observability, managing state, and the human factors of team skills and vendor lock-in. This session is for developers, DevOps engineers, and architects to help them design serverless applications effectively and avoid common mistakes.