Go Serverless, Not Flagless: Implementing Feature Flags in Serverless Environments

The article discusses the integration of LaunchDarkly feature flags with AWS Lambda in serverless architecture applications. Serverless architecture offers faster development, lower costs, and less maintenance compared to traditional architectures. Feature flags allow teams to control feature releases without redeployment, which is particularly useful for stateless serverless applications. The article provides a step-by-step guide on how to integrate LaunchDarkly into an AWS Lambda application using the NodeJS runtime. It also explains how to store flag configurations in ElastiCache and process them within the application. Finally, it emphasizes that there are multiple ways to implement feature flags in serverless architecture applications depending on the app's structure, serverless provider, and implementation timeline.