Sangwoo Lee articles - 5 total
Optimizing Push Notification Logging at Scale - From Synchronous Bottleneck to Async Batching
How I transformed notification logging from a blocking operation to a non-blocking batch system,...
Breaking Down a 1,500-Line Firebase Service - Clean Architecture in Practice
How I refactored a monolithic Firebase service into clean, testable, and reusable utility modules...
Decoupling Firebase Push Notification Logic with BullMQ - From Synchronous Chaos to Asynchronous Elegance
How I transformed a monolithic Firebase notification service into a scalable queue-based...
Firebase Push Tokens Are Device-Specific, Not User-Specific: A Critical Refactoring
When I first built my Firebase Cloud Messaging (FCM) notification system, I made a critical...
Refactoring Mass Push Notifications: From Offset to Cursor Pagination
How I achieved 17x-400x performance improvement by switching from offset to cursor-based pagination...