Solo dev's Opener Market odyssey ends in glory: Redis Lua scripts crush coupon chaos, DB locks fend off over-selling apocalypse, search latency dives 72%—because e-commerce empires start in basements

The Opener Market project, a high-concurrency e-commerce platform, has concluded with significant achievements in system architecture and performance optimization. The platform is divided into three domains: Coupon, Order, and Search, each addressing specific high-traffic challenges. Notably, the Search Domain's latency was reduced by 72% from 1.8 seconds to 0.5 seconds. The project utilized Redis Lua Scripts, Database Locking, and QueryDSL to ensure data consistency and transaction integrity. Key lessons learned include the importance of a memory-first strategy, asynchronous processing, and balancing data integrity with speed. The project demonstrated the effectiveness of using Redis to handle high-concurrency events, resulting in a successful issuance of coupons without relying on database locks. With its scalable backend system, Opener Market achieved guaranteed atomic transactions and improved throughput. The project's outcomes have significant implications for the e-commerce industry, highlighting the importance of optimizing system architecture for high-traffic events and prioritizing data accuracy.