Serverless File Processing with AWS Lambda and S3

Handling user file uploads is a foundational requirement for modern web applications, but managing servers to process them can be complex and expensive. Serverless architecture solves this by running code only when an upload event occurs, saving you time and infrastructure costs. In this text-based course, you will learn how to build a secure, event-driven image upload pipeline. You will understand how to encode files using Base64, transfer them via APIs, write them to Amazon S3 using AWS Lambda, and configure the necessary permissions to keep your application secure. What you will learn: Understand foundational serverless concepts and event-driven architecture basics; Configure Amazon S3 buckets to store uploaded files and trigger downstream events; Write AWS Lambda functions to process, decode, and store Base64-encoded image data; Apply IAM policies following the principle of least privilege to secure your serverless resources; Practice debugging and monitoring your file workflows using structured CloudWatch logs. The course begins with essential terminology and the basics of file transfer protocols before guiding you through step-by-step written tutorials and structured code examples to implement a complete file-processing pipeline. This course is designed for beginner developers and cloud enthusiasts who want to learn serverless integrations; no prior AWS experience is required. Start reading today to master event-driven serverless file handling.