Event-driven serverless orchestrator using AWS Lambda to coordinate requests across OpenAI, Firebase, and Google Places APIs. API Gateway routes client requests to a Lambda function that orchestrates external API calls, persists results in DynamoDB, and logs telemetry via CloudWatch. Secrets Manager securely manages API keys while IAM roles enforce least-privilege access across compute and data subnets. This pattern eliminates server management, scales automatically with demand, and centralizes API orchestration logic in a single Lambda function for simplified maintenance and cost optimization.