- Launched the personal project Crypilot independently in 5 sprints, integrating Back-End and Blockchain technology to make it easier for web3 beginners to create wallet, obtain info, and trade crypto. - Won popularity award in a co-work competition by developing a chat room in collaboration with two Front-End and two iOS engineers. Responsible for designing system architecture and building socket server, act as coordinator in the team. - Developed a short URL application with QPS 2000 capacity by implementing DB sharding to handle high traffic by working with two team members. - Experienced in utilizing various tools to build load balancers, such as AWS and NGINX, and well-known in multiple load balancing algorithms to increase capacity and reliability of application. - Built e-commerce website STYLiSH in 4 sprints, completed tasks of every sprint on time, and further surveyed WebSocket to implement an instant notification feature.

- Developed NFT marketplace with value-adjustment exchanging/ selling/ bidding NFT functions, features fragmenting NFT, fragment low liquidity ERC721 to get ETH liquidity in fractional token / ETH pool. - Familiar with domain knowledge, such as consensus mechanism, EIPs standards. - Set up Compound, features mint/ redeem/ borrow/ repay function, and Uniswap AMM, features swap/ add liquidity/ remove liquidity function. - Developed Flashloan, liquidated in Compound to take 605 USD profit with low risk and cost. - Experienced in writing contract automation test scripts with 100% coverage(unit and integration test) to minimize security risk by JS. - Reproduced historical exploit attack - Alpha Finance, traced transactions by Ethereum Transaction Viewer and Tenderly, forked Ethereum mainnet by Hardhat to reproduce exploit attack. - Familiar with security knowledge, passed 10 security challenges in Ethernaut, passed 5 challenges about Flashloan in damn-vulnerable-defi.

- Familiarized with Solidity and Hardhat. - Developed NFT-Swaper for NFT exchanging.

- Improved DDR5 yield about 4.1%, controlled projects schedule and coordinated resource to let modules execute plans. - Maintained inline deviation of responsible process layers smaller than 0.5 sigma by y3 tool, analyzed data correlation and found out root cause. - Simplified process to lower the cost about 1.5M TWD per year, evaluated probe and back-end data of product skipping the specific layer.