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ActiveSub: Subscription & Trial Saver

Role: Cloud Systems Engineer | Tech Stack: API Gateway, Lambda, DynamoDB, EventBridge, SES

The Problem

Consumers lose hundreds of dollars annually to forgotten free trials and auto-renewing subscriptions. Relying on calendar apps is manual and error-prone.

The AWS Architecture

This tool utilizes a fully serverless, event-driven architecture to automate financial alerts:

  • Data Persistence: User inputs are POSTed via API Gateway to an AWS Lambda function, which writes the expiration dates to a DynamoDB table.
  • Cron Jobs: Amazon EventBridge triggers a daily Lambda execution that scans the database for trials expiring within 48 hours.
  • Automated Alerts: When a match is found, Amazon SES (Simple Email Service) dispatches a formatted cancellation reminder directly to the user's inbox.

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๐Ÿงช Try the Live Demo

Enter your info to instantly receive a mock AWS SES alert.

๐Ÿ“ก Live Architecture Testers

Real-time DynamoDB feed of the last 20 users.