karl2026

 Security Operations: Responsible for business system security event analysis and assessment, vulnerability remediation tracking, security risk analysis and closed-loop management, participating in network, API, database and data security assessments.  Database Audit Project: Led the initial construction phase of the database audit and API security monitoring project independently — vendor research, technical solution, project initiation, procurement parameters, risk assessment and selection support; the relevant projects have been officially initiated.  API Security Monitoring: Based on the online banking zone and open interconnection zone network architecture, planned traffic mirroring collection via core TAP switch, covering core egress and high-risk interfaces.  Security Mechanism Building: Familiar with TLS/mTLS, signing and verification, Chinese national cryptography (SM series) algorithms, key management and audit trails, providing an engineering foundation for financial system security protection.

 Wallet Query Infrastructure: Maintained production query systems covering 100+ blockchain networks, handling data sync, RPC calls, parsing & database persistence, consistency checks & anomaly recovery; processed tens of thousands of on-chain transactions daily.  Grouped Deployment Architecture: Independently designed EVM grouped deployment architecture, reducing EVM services from 10+ to 5-6; merged first 5 EVM-compatible chains into a single Go service, reducing deployment units from 5+ to 1, cutting migration workload by at least 50%.  Geth Client Upgrade: Responsible for custom geth client major version upgrades, merging internal RPC features into upstream official new releases, resolving code conflicts and verifying compatibility.  Snapshot Consistency Solution: Designed concurrent balance retrieval via goroutine+work pool+sync.WaitGroup, resolving a map concurrent read/write bug caused by RPC client shallow copy (1-week investigation), ensuring multi- address snapshot data consistency.  Production Reliability: Handled code reviews, release approvals and incident response; with stability practices including reorg rollback, idempotent writes, checkpoint recovery, and sequential resumption after restart; able to troubleshoot from node, RPC, network, service, database and chain state layers to restore services.