williamxie

Designed and implemented a high-throughput blockchain transaction stress testing bot in Go. Supported multiple transaction types and sustained extremely high TPS without being limited by RPC throughput or single-machine performance. Achieved very low transaction failure rates, enabling accurate stress testing of Cronos under different protocol and parameter configurations. Provided critical performance data for chain tuning, parameter decisions, and stability validation. Core contributor to the Cronos (Cosmos-based) blockchain explorer indexing service. Synchronized block data directly from Cronos / Tendermint nodes, parsing blocks, transactions, and events. Built high-performance RESTful APIs for querying blocks, transactions, and event data. Supported both real-time and historical data access for public explorers and internal systems. Independently designed and implemented a high-performance historical data reindexing service in Go. Used for schema changes, data repair, and large-scale historical backfills. Achieved significantly higher throughput than the main indexer, with multi-node horizontal scalability. Dramatically reduced reindexing time, removed dependency on DevOps intervention, and improved overall engineering efficiency.

Backend built with Spring Boot microservices, frontend with Angular. Led backend integration of the blockchain wallet system, generating deposit addresses using HD wallets. Developed backend services for HSM-based custody, including asset consolidation and withdrawals. Designed deposit consolidation strategies to periodically aggregate funds into multi-signature cold wallets. Implemented batch withdrawal transactions to improve throughput and reduce on-chain fees. Adopted multi-signature cold wallets (Ledger/Trezor) to enhance asset security. Long-term contributor to an internal infrastructure and virtualization management system. Backend services built with NestJS and Spring Boot. Designed and implemented intelligent DNS management and machine health monitoring. Developed frontend admin dashboards using Vue + Ant Design. Took responsibility for frontend task breakdown and technical mentoring.

Participated in the development of an Ethereum wallet supporting ETH and ERC-20 tokens. Implemented features for multi-signature wallets to enhance asset security. Integrated smart contract interfaces and debugged on-chain transactions. Worked across mobile and backend systems to deliver complete end-to-end functionality.