Stop hardcoding! Use AWS Parameter Store instead (Hands-On) This article is a practical guide for DevOps engineers who want to manage configuration and secrets the right way on AWS. Introduction If you have a database hostname, a password, and an API URL your application needs to call, where do you put them? The wrong answer is “environment variables hardcoded into your Lambda function” . The issue is: different environments (dev, prod) need different values, rotating a password means redeploying every service that uses it, and hardcoding config eventually ends up in Git (you don’t want that, trust me). AWS has multiple services for managing configuration and secrets, but today we will focus on AWS Systems Manager Parameter Store . AWS Parameter Store gives you a central, secure, hierarchical place to store configuration and secrets, and any AWS service can read from it at runtime without you changing a line of application code.…