Guide: Enabling Synchronous Communication Between AWS Lambda and NestJS Services

A developer guide published on DEV Community explains how to set up inter-service communication in a distributed system using AWS Lambda and NestJS. The approach draws inspiration from Dapr, a microservices framework, aiming to abstract away the complexity of service-to-service communication. A custom LambdaCommunicationService is built to act as a bridge, allowing one Lambda function to invoke another using a simple method call with parameters like service name, path, and HTTP method. The guide covers building the communication service, adding retry logic, and implementing a Lambda factory that supports both local and cloud environments. A demo application is available on GitHub, with a follow-up guide on asynchronous communication via AWS SQS planned for the future.