💶 FINTECH PubSub migration

The Challenge

A FINTECH client asked us to migrate their current refund logic to PubSub. All refunds are then asynchronous and need to be processed in the background. The client wanted to leverage PubSub’s scalability and reliability to handle the increasing number of refund requests efficiently and make sure users are not waiting for refunds to finish.

The Solution

We designed a solution that integrates PubSub into the client’s existing infrastructure to manage refund requests. The refund logic was refactored to publish messages to PubSub topics, which are then consumed by subscribers to process the refunds. This asynchronous processing allows the client to handle refunds more efficiently without impacting the user experience.

Challenges & Learnings

• 🧩 Data Consistency: Ensuring data consistency between the refund requests and the processing logic was crucial. We implemented a mechanism to handle retries and ensure that refunds are processed accurately.
• ❌ Error Handling: Handling errors during the refund process was a key consideration. We designed a robust error handling system to manage exceptions and ensure that refunds are processed successfully.
• 📈 Monitoring & Logging: Setting up monitoring and logging for the PubSub integration was essential for tracking refund requests and processing times. We implemented logging and monitoring solutions using DataDog to provide visibility into the refund process.
• 💶 Cost reduction: We had to manage the costs associated with PubSub usage. We optimized the configuration to minimize costs while ensuring the system’s performance and reliability.
• ⏩ Scalability: PubSub’s scalability was a significant advantage for handling the increasing volume of refund requests. We optimized the PubSub configuration to ensure that the system can scale to meet the client’s needs.

💡 Want to learn more? Feel free to reach out!