Worked on cache architecture optimization for the kaiachain/kaia repository, focusing on backend development with Go. Developed a pointer-free FIFO-based cache to replace pointer-rich LRU caches for per-peer transaction, block, and bid storage, targeting improved memory efficiency and reduced garbage collection overhead. The new design used a ring and map structure to achieve constant-time eviction and membership checks, eliminating pointer traversal and reducing GC scans. Benchmarks demonstrated reduced operation latency and memory footprint, with GC time dropping substantially for large cache sizes. The approach emphasized predictable memory usage and simpler eviction semantics, supporting scalability across high-memory, long-running node environments.