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In the video, I discussed the criticality of notification systems for fintech companies like Razer pay. I delved into Razer pay's notification system architecture, emphasizing the importance of timely notifications for transactional integrity. I highlighted the challenges faced by Razer pay in scaling their notification system, such as database bottlenecks and handling peak loads during special events. I detailed the incremental changes Razer pay made to their architecture, including prioritizing incoming loads, implementing separate queues with different priorities, and addressing database scalability issues by writing asynchronously to Kinesis. Additionally, I underscored the significance of observability in ensuring system health and meeting SLAs. This comprehensive approach to system design and optimization is crucial for delivering a seamless user experience, as demonstrated by Razer pay's notification system overhaul.

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