john8

Led a team in designing and developing high-performance blockchain applications using Rust. Worked with backend engineering team for upgrading existing backend into Rust backend version from v1.0 to v2.0. Developed quickbooks packages as a crate and published into crates.io with the package name quickbooks. Took part in development of TurboTax admin panel backend system upgrading based on Rust especially for settlement funding management. Developed TurboTax settlement funding admin panel frontend development using Angular.js with frontend engineers based on tickets assigned for me. Designed and implemented the PCAP(Personal Crypto Advertising Preference) based on Decentralized identity provider using Zero Knowledge Proofs and Blind Signatures. Designed the SSI(Self Sovereign Identity) system around the business model. Developed Customer-Centric AD system based on W3C standard DID solution. Implemented light wallet based on social media platforms and DID Avatar Solution integrated into social avatars. Implemented the main app-chain modules by customizing the Polkadot - Substrate network and launched the testnet and deploy parami parachain. Designed and developed the infrastructure and well-formed project of data yield farming DApp and NFT marketplace DApp from scratch. Developed the flow for users who staked SNS token (company token based on SOL) can post a question and also answers for each questions, and also can validate others answers - validated answers can get reward with SNS token. Validated answers and questions are provided to the AI company as a training data. Developed the smart contract of each platforms using Solana-Anchor (Rust) mainly focused on code & storage optimization for less gas fee. Designed and implemented NFTembedded app-chain withSolana-Anchor(Rust)framework and integrated unit test of codebase. Launched and maintained the app-chain testnet for testing the features like NFT minting and NFT collection making. Collaborated and tutored with frontend and backend developers for web3 integration (web3.js + React.js / Typescript + GraphQL) and phantom wallet interaction. Developed smart contracts using Cosmwasm and Rust, adhering to best practices for security and efficiency. Facilitated daily stand-ups, sprint planning, and retrospectives, ensuring alignment with agile methodologies. Conducted code reviews and provided mentorship to junior developers, fostering a culture of continuous learning and improvement. Developed and maintained scalable, modular blockchain solutions in collaboration with the Senior Frontend Development Team. Ensured that all backend functionalities were seamlessly integrated with frontend applications to provide the best user experience. Implemented new features and extensions on the blockchain platform, leveraging feedback from the frontend team to enhance functionality and usability. Utilized Golang for backend development, ensuring high performance and reliability of the blockchain network. Directed the formulation and assessment of smart contracts for DeFi protocols, covering DEX, liquidity pools, lending platforms, and yield farming strategies, and upheld regulatory compliance and operational integrity in the cryptocurrency landscape. Spearheaded the development and integration of Tokenomics models and incentive mechanisms, resulting in a 23% increase in daily active users and a 40% surge in liquidity. Joined a team of developers, designers, and product managers in a collaborative effort, driving a 30% boost in user adoption rates and a 15% enhancement in platform scalability. Championed the development of groundbreaking blockchain solutions, and leveraged expertise to provide strategic guidance and technical insights for clients, driving successful project implementations and business growth. Coordinated with the frontend team to ensure alignment on user experience goals and feature implementations. Managed project timelines and deliverables, ensuring that all milestones were met within stipulated deadlines. Designed and deployed custom smart contracts for an NFT marketplace, translating business requirements into technical specifications.

Implemented gas optimization strategies to minimize transaction costs and enhance platform scalability, conducting extensive testing and performance tuning to optimize contract efficiency. Integrated Merkle tree-based signature verification mechanisms to fortify platform security, ensuring robust authentication and data integrity across all user interactions. Developed bespoke smart contracts for NFT marketplaces, leveraging Solidity to construct intricate functionalities tailored to specific business requirements. Innovated a reservation swap mechanism enabling users to secure listed items through a two-step payment process, integrating payment verification and token minting protocols to ensure transaction integrity and user trust. Engineered gas-less transaction protocols, optimizing gas usage across all platform interactions by implementing off-chain transaction management and batch processing techniques. Implemented Merkle tree structures for signature verification, utilizing efficient hashing algorithms to validate large datasets with minimal computational overhead, enhancing security and scalability. Spearheaded the development of custom tokens and associated infrastructure across multiple blockchain networks, ensuring alignment with business objectives and regulatory requirements. Led integration efforts with decentralized and centralized exchanges, bridges, and token sale platforms, optimizing liquidity and market access for issued tokens. Implemented the IDO smart contract and Launchspot and development the core smart contract of IDO to crowdfunding and ERC-20 token swapping like uniswap liquidity pooling and farming integration. Developed the feature staking and unstaking of fast and the liquidity aggregator and limit order feature and token bridge between Avalanche chain and Ethereum chain. Implemented Layer-2 Scaling Solution using Polygon Network integration and Polygon-zkEVM. Integrated SSO login flow using OpenApi and OpenId via company individual logic and used. FluentValidation, Cronos, Swashbuckle packages in backend side. Implemented mint, transfer logic and auction, bid, create / offer logic for NFT marketing side and deposit and withdraw token logic for wallet manage side. Integrated smart contract to Asp.net backend using Nethereum package and hosted backend to AWS Elastic Beanstalk and uploaded Postgresql DB via AWS service. Developed pixel-perfect UI that is the modern and fantastic and also added some flexible animations using react and typescript and used IPFS and Infura. Developed Android and iOS hybrid app using React Native integrating firebase backend and firestore. Led the implementation of a new decentralized finance (DeFi) protocol, increasing user transactions by 50%. Built smart contracts for the Ethereum platform, managing a portfolio of 10 projects. Engaged closely with regulatory compliance teams to ensure that 15 blockchain solutions met industry standards and regulatory requirements. Achieved a 30% reduction in gas fees on smart contracts by optimizing solidity code and implementing market research. Engineered custom tokens across various blockchain networks, employing tailored implementations to address specific business needs and optimize functionality. Implemented staking protocols and farming mechanisms to incentivize user engagement and network participation, fostering long-term investments and sustainability. Orchestrated successful token sale launches on platforms like PinkSale, adhering to compliance measures and regulatory requirements through meticulous documentation and due diligence. Developed an escrow system facilitating quiz contests, enabling creators to define contest parameters and prize token specifications, with automatic distribution to winners upon completion.

Developed and maintained backend services for a high-traffic e-commerce platform using Java Spring Boot. Collaborated with a team to design and implement RESTful APIs to support 4 client applications. Participated in code reviews and provided constructive feedback to improve code quality and maintainability. Worked closely with product managers to define requirements and prioritize features based on customer needs. Assisted in the development of 3 web-based project management tool using React.js and Node.js. Designed and implemented user interface components using modern front-end frameworks and libraries. Collaborated with senior engineers to implement new features and enhance existing functionality. Participated in team meetings and brainstorming sessions to discuss project requirements and design solutions.