1. TTWallet Backend Service • Designed and implemented a service facilitating cross-chain bridging for web3 wallets, ensuring seamless integration with Multichain. Primary languages and tools used included Node.js, Nest.js, and ethers.js. • Designed and implemented a real-time, cross-language, and cross-timezone push notification system. Additionally, developed an internal API empowering the operations team to send custom push notification requirements. 2. TTFarm | GameFi project on the ThunderCore blockchain • Developed a GameFi project centered around the theme of animals, implementing business logic using Solidity and the Truffle development framework. The project achieved over US$500K in sales within the first 3 weeks of launch and surpassed US$4.5M in total sales. • Built a backend event tracking system by batch-fetching contract events on the blockchain. This system empowers the operations team to analyze sales quantities and cost metrics from various perspectives. The technology stack includes Node.js, ethers.js, and PostgreSQL. 3. TTWallet | A mobile wallet with over 500K Monthly Active Users • Designed and integrated multiple payment platforms, including Binance Connect and Coinbase Pay, into our web3 wallet for seamless and secure financial transactions. • Integrated Wallet Connect v1 and v2 functionalities into our web3 wallet, enhancing its seamless interaction with Dapps for enhanced convenience.

1. TTWallet • Implemented a user-centric quest system to boost user engagement, including functionalities like monitoring user interactions with DApps to earn TT and retweeting Twitter posts for extra TT rewards. Utilized technologies such as React Native, Redux. • Upgraded the React Native version of TTWallet from 0.65 to 0.69, successfully completing the upgrades for both iOS and Android platforms to comply with the latest Google Android SDK policies. 2. TTMining | A one-stop DeFi platform where you can earn TT and stablecoin • Rapidly constructed a user-friendly DeFi DApp using React.js, Redux, and Material-UI, allowing users to effortlessly generate TT and stablecoin interest by placing assets on TTWallet. • Collaborated with product manager and designer to construct a Bounty Hunter and friend referral system, catapulting TTMining's daily active users to 20K. 3. Pos-Staking | A DApp allows users to stake TT to secure the ThunderCore network • Collaborated to develop the highest TVL DeFi DApp on the ThunderCore network with designers and contract engineers, utilizing technologies such as React.js, TypeScript, Redux, and Ethers.js. • This DApp enables users to stake, unstake, and claim their native token to earn rewards, contributing to the enhanced security of the ThunderCore network. The protocol has reached a TVL milestone exceeding US$5M.

• Implemented a blockchain transaction log backups database with MongoDB. • Built an event listener application for discounting system and logger mechanism for monitoring irregular transaction events.

• Built cross platform (iOS/Android) mobile applications in React Native. • Conceptualized and designed the contact book app for kindergarten.

• Built a back end system of social media in Node.js. • Integrated with third-party OAuth providers (FB/Google) and web framework (Express). • Designed and Implemented of a message transmission system with MQTT.

• Built a data visualization platform for top 100 Facebook fan pages in AngularJS. • Implemented a Facebook crawler in Python and stored the parsed website data into MySQL.