Designed and deployed smart contracts on Ethereum and EVM-compatible chains using Solidity with focus on gas optimization and security. Integrated Viem / Ethers.js to interact with on-chain data across multiple DApps. Maintained 80%+ test coverage through unit & integration tests using Hardhat / Foundry, ensuring zero critical vulnerabilities before mainnet deployment. Developed on-chain/off-chain data synchronization pipeline for real-time portfolio tracking and analytics.

Contributed to a hotel booking platform as part of a cross-functional team of 8 members. Built reusable React components using hooks and component-based architecture, improving UI consistency across the platform. Integrated RESTful APIs for real-time data rendering and collaborated via Git under Scrum methodology over a 3-month On-the-Job Training.

Developed and maintained backend services using .NET Core 8 following Clean Architecture and SOLID principles. Worked with RESTful APIs and SQL databases to support real-world production features.