Zhongwei Zhou
EXPERTISE
BIO
Led the development of a Blockchain-based sports betting system, managing a $5.7 million budget and a cross-functional team. Spearheaded the creation of a recruitment platform using blockchain and AI. Expert in developing decentralized applications, having delivered solutions impacting over 76,000 users. Proficient in Solidity and Rust for smart contract development. Extensive hands-on experience with deep learning and generative AI.
WORK EXPERIENCE
Project Manager
SafeHaven Exchange
December 2024 - Present
Project Manager of SafeHaven Exchange, leads product strategy and tokenomics, building trust and empowering a resilient investor community and leading US based CEX development directly.
Lead Blockchain engineer
Brainvire Infotech Inc
August 2021 - December 2024
Led the development of DeFi protocols such as UniSwap and PancakeSwap, resulting in $5.7 million in TVL across the platforms. Integrated Hierarchical Deterministic (HD) wallets across 5 blockchain platforms, supporting multi-chain transactions and improving cross-chain asset management by 30%. Developed custom tokens and ICOs, resulting in the successful launch of 3 dApps using Solidity, raising $2 million in initial funding in Solana network. Implemented real-time blockchain data fetching using Polygon and Etherscan APIs, reducing data retrieval time by 50% and improving system responsiveness. Enhanced user security by implementing biometric-based IDs, reducing unauthorized access attempts by 40%. Engineered a fixed-supply blockchain network with custom mining algorithms, stabilizing the network and reducing volatility by 20%. Applied unit testing and TDD principles to smart contracts, reducing deployment errors by 75% and increasing code reliability. Deployed blockchain nodes on AWS, enhancing scalability and reducing latency by 35%, supporting an increase in transaction volume by 40%.
Cosmos Sdk Engineer | Senior blockchain engineer
Unique Software Development
February 2017 - July 2021
Integrated Protobuf as the main encoding library in the Cosmos SDK, leveraging its tools to enhance data serialization and communication, resulting in a 25% improvement in data transmission efficiency. Tacked Node Client (Daemon) RunTx recovery middleware, ensuring transaction integrity and reliability, and reducing transaction failure rates by 15%. Leveraged Tendermint for secure and efficient transaction processing, improving throughput by 20% and enhancing fault tolerance. . . Optimized the core ABCI message handlers to ensure efficient transaction validation and processing, resulting in a 30% improvement in transaction throughput. Developed secure state-machines on top of CometBFT using the Cosmos SDK, implementing robust data persistence and transaction handling mechanisms, which resulted in a 40% increase in transaction processing efficiency and a 30% reduction in data inconsistencies. Ran IBC protocols on the Cosmos Hub, facilitating seamless communication and transactions between independent blockchains. This led to a 50% increase in cross-chain transactions. Implemented and tested over 5 Zero-Knowledge-based solutions, with a deep understanding of ZK-Rollups. Applied cryptographic methods for digital signature verification, including ECDSA and DKL, in 3+ projects. Developed expertise in Public Key Infrastructure (PKI), Zero-Knowledge Proofs (ZKP), and Hashgraph technology. Successfully launched 2 ZK-based Layer 2 solutions using Polygon’s Chain Development Kit (CDK). Managed the launch of tokens on the ZK-Rollups platform, achieving a 60% average staking participation rate through comprehensive tokenomics strategies and secure staking platforms. Balanced a ZK-Rollups chain operating on top of the Ethereum blockchain, enabling the execution of transactions off-chain while periodically committing transaction batches to an on-chain rollup contract. This resulted in a 50% reduction in gas fees and increased transaction throughput.
Senior frontend engineer | Web 3 engineer
GiniLytics IT Solutions
June 2013 - February 2017
Launched P2E game, attracting 30,000+ players. Implemented advanced NFT features using ERC-721, ERC-1155, and ERC-2535 standards, enhancing the functionality and upgradeability of deployed contracts. Motivated user engagement by 30% by integrating multiple wallet connections like MetaMask, Phantom, and HashPack across various DApps. Supported a DeFi platform from Ethereum to Hyperledger, resulting in a 50% reduction in transaction fees and a 25% increase in platform user retention while maintaining cross-chain compatibility and security. Audited smart contracts to enhance platform security, preventing potential losses of up to $2 million by identifying and fixing vulnerabilities in Ethereum Network. Integrated Web3 technologies such as MetaMask wallets, DID, and IPFS into dApps, increasing user adoption by 40% and reducing onboarding time by 20%. Provided a distributed, full-text search engine using Elasticsearch, improving search speed by 50% and supporting millions of queries per day across multiple clients. Built a private blockchain using Hyperledger Fabric 1.0, enhancing data security by 93% and significantly decreasing risk exposure for all participating entities. Reduced airdrop costs by 50% when distributing 520 million tokens by utilizing bundled addresses and meta transactions, saving significant operational costs. Wrote a smart contract for airdropping without using the owner’s gas, implementing a claim function with Merkle Proof, which reduced gas fees by 60% and improved distribution efficiency in Ethereum network. Executed Merkle-Tree-Bulk-Transfer, Multiple-Tokens-Airdrop, and Charity-based NFTs, successfully minting and storing 10,000 NFTs on IPFS, which increased minting efficiency by 35%.
Web Developer
Include Software
August 2012 - April 2013
Configured minification, SASS preprocessor to CSS, and test runner with Karma. Experience with Angular versions, including Angular 2, and used Jasmine and Karma for test cases in AngularJS. Developed custom directives, controllers, views, and filters using AngularJS architecture. Implemented 2-way data binding and used ng-filters across the application. A single page application is implemented using AngularJS. Automated build processes with Jenkins, including compilation, packaging, and artifact management, improving efficiency and consistency across development teams. Helped build a web scraping system using PHP for an automated Cyber Security firm database. Developed custom directives, controllers, views, and filters using AngularJS architecture. Worked on various CSS frameworks like Bootstrap to develop responsive web pages. Delivered a fully functional Content Management System – Website using WordPress. As a result, the website has enhanced stakeholder communications and outreach processes, making it possible for stakeholders to receive critical information swiftly. Used Node.js to offer an easy and safe way to build high-performance and scalable network applications. Involved in consuming RESTful APIs and processing JSON data for rendering in UI. Optimized JSON data structures and queries to enhance API performance and data handling efficiency. Worked with the QA team on a daily basis in fixing reported bugs/defects and checking cross-platform compatibility. Used AJAX to provide an advanced user experience. Implemented GUI pages by using JSP, JavaScript, CSS3, and HTML5.
PORTFOLIO PROJECTS
S3DOC
The S3DOC information system is a new generation of a durable medium with digital signature (eIDAS), the so-called softWORM, in which durability features are guaranteed by applying the best world practices and standards in the area of algorithms and cryptographic methods implemented in the software. S3DOC is an innovative EU-wide information system with the characteristics of a durable medium. I designed and developed the S3DOC durable medium based on Ethereum and IPFS. I created complex smart contracts, e.g., data storage, user management (user register, personal data, authentication), and document management (document register, document metadata). I built decentralized software that stores documents on IPFS and their metadata on Ethereum. In the second version of the system, I moved all the software to a new blockchain platform written in Node.js, achieving much better performance and security compared to Ethereum and IPFS.
View ProjectTriangular Arbitrage Bot
A triangular arbitrage bot that monitors the blockchain for specific transactions that interact with decentralized exchanges. Once found, it checks the trade volume to see if it will cause a significant enough price impact to create an arbitrage opportunity. If so, it will immediately calculate the best possible path for profit and submits the transaction.
View ProjectBlockchain Based patient Data management System
Increased data security compliance by {100%} by developing a HIPAA-compliant blockchain system for managing patient data. Integrated with FHIR standards to ensure interoperability between different healthcare providers. Technologies Used: Hyperledger Fabric, DAML, Python, Node.js, Azure
Luxochain
A customized ERC-721 NFT project in which I wrote the smart contract in Solidity and liaised with a front-end developer to integrate Web 3 functionality on the web page. Customization was in the pricing structure and revealing strategy of NFT. The project was deployed on the Ethereum blockchain.
View ProjectTOPASS NFT
TOPASS tokens provide a unique safeguard against the possibility of counterfeit goods with single-package accuracy. The consumer will be able to verify the originality of the product immediately after purchase. Security with TOPASS tokens prevents copying and multiplication of security features on counterfeit products, which is possible with hologram security features. There are many other uses for TOPASS tokens, which are described on the website. The TOPASS smart contract runs on a public blockchain platform. We use the efficient L2 Polygon platform for this purpose. It guarantees high performance and low transaction fees. We can run our smart contract on another Ethereum-compatible platform upon your request. I was in charge of implementing NFT tokens and modifying them for client requirements. I also programmed a middleware server using Node.js and Express.js, which provided a REST API to enable the client systems to use the tokens.
View ProjectNature NFTs Marketplace
The Nature NFT Marketplace is an NFT factory deployed on the Polygon Mainnet blockchain. It allows users to create their own NFT from a digital image, list it for sale on the marketplace, and actively trade all users' NFT listings. It was built with an Ethereum smart contract that adds the previously mentioned functionality. I have deployed the app to the Polygon and Arbitrum blockchains in an effort to lower transaction "gas" fees. This project's GitHub repository can be found at Github.com/georgemac510/nature-nfts-marketplace-polygon.
View ProjectLegal Documents Marketplace
The Legal Documents form repository is a datastore and marketplace for purchasing common fillable-PDF legal documents such as a simple will, articles of incorporation for specific states or provinces, bill of sale samples, building contracts, and business plans. Currently, the legal documents are stored as .jpg files. In future iterations, the documents will be fileable-PDFs so users can fill them with their unique information and use them for their purposes. The legal documents are stored on IPFS and deployed to the Goerli Ethereum Testnet as ERC-721 NFTs. This project's GitHub repository can be found at: github.com/georgemac510/blockchain-developer-bootcamp-final-project. Your Metamask account must be set to the Goerli blockchain to view and interact with the app.
View ProjectDecentralized Token Exchange
The McKurz cryptocurrency exchange dApp was launched on the Ethereum Kovan Test Network in August 2020. It has since been upgraded to the Goerli testnet due to the Ethereum Merge and the deprecation of the Kovan chain. The exchange allows users to list buy and sell orders of different cryptocurrencies. The app is an older production and works best with unlocking Metamask with your password, refreshing the browser after connection, and possibly making a manual connection to the Metamask Goerli wallet (update shortly). If you need Goerli testnet tokens to test the app, please email john.mclaughlin@toptal.com with your Goerli Ethereum address, and testnet tokens will be sent to your address.
View ProjectSafe Harbour Finance Reward Coin Staking App Deployed to zkSync
The Safe Harbour Finance app allows users to stake native SAFE tokens and acquire rewards of the platform's native SAFE token. The app's uniqueness is that it is deployed to the zkSync testnet 2.0, where costs of staking, transfer, lending, or borrowing are quite inexpensive and secure. To use the app, you will need to add the 'zkSync alpha testnet' to Metamask. Directions for this process can be found at: https://v2-docs.zksync.io/dev/troubleshooting/important-links.html#testnet-network-info. Demonstrations of the app are available.
View ProjectDApp Platform
• Developed a React-based DApp to provide users with easy and efficient access points to the best of decentralized finance. I helped set up 15 customizable earning strategies and all market data in one spot to let users benefit from the future of finance. • Fixed multiple productivity issues within old code, which resulted in faster and lighter performance. • Used smart contracts to implement all necessary blockchain features requested by product owners. • Managed the front-end team: code review, task management, deployment, consultation, mentoring, and work planning. • Developed new staking products, improving customer attraction by 20%. • Designed multiple dynamic and browser-compatible pages using HTML5, CSS3, and JavaScript (React, Redux). • Identified issues and provided solutions to problems related to performance and poor UX to ensure support and up-to-date user experience for existing customers.
View ProjectCrypto Copy Trading Platform
Bidsbee is the ultimate solution to all the challenges of crypto trading. Its comprehensive set of advanced yet easy-to-use tools and functions allows users to join the trading world as seamlessly as possible. The functionality of copy trading enables users to benefit from the expertise of professionals and earn a passive income without participating in trading activities. For professional traders, the platform offers the most advanced functionality and all the relevant data on the market in one place for users' comfort and more profit. All services are non-custodial, which guarantees the top safety level for the funds of our users.
View ProjecteCommerce Website
I developed an eCommerce solution based on Django-oscar for one of Spain's largest kids' fashion brands. I customized it for their wholesale solution and integrated a national payment solution and shipping service to offer a smooth user experience. I also maintained it. The system has been operating for four years.
View ProjectSolidity Engineer at Panoptic
Developed smart contracts, 3rd-party smart contracts integrations, tests, and deployment scripts. Technology used: Solidity, Hardhat, OpenZeppelin, Uniswap v3, TypeScript, JavaScript, The graph, etc.
View ProjectKaggle - Data Science Competitions
My rankings demonstrate my ability to compete with the world's best data scientists: * Top 6% (100/1984) in Expedia Hotel Recommendation * Top 9% (84/979) in Outbrain Click Prediction
View ProjectVerified Blockchain Developer
8+ years of experience
Preferred commitment: Part Time
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