June 2025 monthly summary: Implemented WebSocket Message Size Limit feature in shardeum/json-rpc-server, adding a configurable sizeLimit, enforcing it at the server, and handling oversized messages with robust error signaling. This reduces DoS risk and strengthens stability under high-load traffic. Linked to SHARD-1712: Limiting packets size on websockets (#164). No separate major bugs fixed this month; stability improvements come from the feature itself. Overall impact includes reduced risk of DoS, improved reliability under burst traffic, and clearer failure modes for oversized payloads. Technologies demonstrated: WebSocket server configuration, input validation, error handling, Git-based traceability, and issue-linked development.

January 2025 focused on stabilizing timestamp handling in shardus-core to improve reliability and data integrity of transaction timestamps. Implemented a fixed-size cache for timestamp retrieval, introduced pruning to cap memory usage, and added validation to ensure cycleCounter matches the latest cycle number, preventing processing of stale data.

December 2024: Delivered reliability, security, and data-quality improvements across three repositories, strengthening transaction data reliability, staking operations, and system hardening. Key business value includes reduced risk of infinite data fetch loops, improved accuracy of staking processing, and strengthened API proxy security, enabling more trustworthy analytics and customer-facing experiences.