paul730

Engineered real-time, high-throughput systems using Node.js, Express.js, and WebSocket for order tracking and status updates, improving user experience by providing instant feedback during peak demand times for Grubhub’s delivery services. Integrated Redis for caching critical data, enhancing the performance of Grubhub’s order management system by enabling faster retrieval of high-frequency data such as restaurant menus, delivery status, and user preferences.

Developed ERC-20 token contracts on Ethereum and Solana, enabling seamless wallet integrations and facilitating secure decentralized exchange (DEX) functionality within Coinbase's decentralized product ecosystem. Worked on the implementation of Layer 2 scaling solutions such as Optimism and Arbitrum, reducing transaction costs and improving throughput for Coinbase’s DeFi products, making decentralized financial transactions more scalable. Integrated Web3.js into the Coinbase wallet, ensuring secure user authentication and seamless smart contract interaction with decentralized applications (DApps), focusing on DeFi protocols such as Uniswap and Aave. Contributed to the development of Decentralized Identity (DID) solutions using blockchain-based authentication, allowing users to control access and securely interact with Web3 applications. Worked on the development of cross-chain asset management solutions by integrating Cosmos SDK and IBC (Inter-Blockchain Communication) to facilitate asset transfers between chains, reducing fragmentation and increasing liquidity across decentralized ecosystems.

Implemented server-side rendering (SSR) and React.js for HubSpot’s CRM and marketing platforms, improving SEO performance and reducing initial page load times for high-traffic user-facing applications. Integrated GraphQL APIs into HubSpot's CRM system, enabling clients to query and retrieve only the necessary data, resulting in improved performance and a more responsive user interface. Developed authentication systems using OAuth2 and JWT for secure, role-based access to HubSpot’s enterprise SaaS platform, supporting single sign-on (SSO) for integration with third-party services. Built a real-time notification system with Node.js and WebSocket, enabling HubSpot users to receive immediate updates on lead interactions and sales opportunities across their CRM and marketing automation tools. Optimized back-end services by implementing caching strategies with Redis and server-side caching using Next.js to improve HubSpot's real-time reporting and data fetching for large enterprise clients.

Developed project management tools using AngularJS and Node.js, focusing on real-time data tracking for construction projects and providing stakeholders with up-to-the-minute project status updates. Spearheaded in integrating Stripe and PayPal for secure payments, automating invoicing and transaction tracking, and ensuring full compliance with financial regulations.