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Youzan Coder
Youzan Coder
Jun 28, 2019 · Mobile Development

Designing a Modular Retail POS System with Offline Synchronization and Search

The article outlines a modular retail POS architecture that separates store, transaction, product, and marketing components, stores product data locally for offline checkout, uses incremental synchronization and cross‑platform pinyin conversion for fuzzy search, and decouples modules via JSON protocols to ensure scalability and reliability.

Hardware IntegrationMobile DevelopmentPOS
0 likes · 18 min read
Designing a Modular Retail POS System with Offline Synchronization and Search
58 Tech
58 Tech
Apr 9, 2019 · Backend Development

Optimizing Group Chat Performance in an Instant Messaging Backend

This article analyzes the challenges of scaling group chat in an instant messaging system and presents architectural optimizations—including shared message storage, periodic conversation list updates, offline count handling, and version‑based incremental sync—to reduce write and read amplification while improving overall performance.

Group ChatMessage QueueWrite Amplification
0 likes · 12 min read
Optimizing Group Chat Performance in an Instant Messaging Backend