Solidity Developer

Architected a blockchain-based elevator maintenance system for a Hong Kong government project using Hyperledger Besu, integrating 1,000 IoT devices to enable predictive maintenance, reducing operational costs by 20%. Led a team of 6 engineers to develop cross-chain solutions, enhancing interoperability between private and government chains in mainland China, improving transaction efficiency by 25%. Optimized smart contracts with Solidity, achieving 100% improvement in data security and transparency for corporate applications by addressing vulnerabilities like reentrancy and overflow attacks. Spearheaded Eurus Layer 1 Blockchain and RajiSwap DeFi/NFT platforms, leveraging Solidity and AWS ECS to boost user engagement by 40% and market reach by 60%.

Designed private blockchain networks using Hyperledger Fabric, implementing consensus mechanisms to enhance data integrity for pharmaceutical anti-counterfeit solutions, improving traceability by 30%. Developed cross-chain cryptographic protocols, increasing asset management efficiency and transaction throughput by 15% across multiple blockchains. Secured HKD $10M in funding from Hong Kong ITF for 3 blockchain projects, leading proposal development and execution to meet strict regulatory standards. Architected microservices-based infrastructure on AWS and Tencent clouds, implementing CI/CD pipelines with Kubernetes to ensure 99.9% system availability.

Built a multi-tenant e-commerce platform on AWS, implementing high-availability microservices to support a 40% increase in online sales through optimized API systems. Conducted research on Bitcoin Layer-2 scaling and zero-knowledge proofs, contributing to privacy-focused blockchain solutions adopted by 2 enterprise clients.

Integrated blockchain systems with ERP and POS platforms, improving supply chain transparency by 30% and reducing inventory costs by 60%. Optimized Microsoft Navision ERP and POS systems, enhancing order fulfillment accuracy by 30% through streamlined workflows.

Led Windows-to-Hyper-V migration, ensuring zero downtime for critical hospital systems while adhering to ITIL standards.

Led server OS upgrades and virtualization projects, increasing system processing speed by 60% and reducing operational costs.