# HarpyWings > Web3 Infrastructure Architect & Core Developer. Specializing in high-performance Golang backends, microservices, and secure smart contract design (Solidity/Rust). Focused on solving deep execution layer challenges, advanced DeFi primitives, and cutting-edge account abstraction frameworks. ## Recent Posts - [Architectural Flaws in EIP-712 Caching: Implementing Safe Execution Guards Under EIP-7702 Persistent Delegation](https://paragraph.com/@harpy-wings/eip-7702-eip-712-architectural-flaws-vaultguard): EIP-7702 rewrites account abstraction, but persistent EOA delegation breaks standard EIP-712 caching. Discover why current patterns fail. ## Blog Information - [Homepage](https://paragraph.com/@harpy-wings/): Main blog page - [RSS Feed](https://api.paragraph.com/blogs/rss/@harpy-wings): Subscribe to updates ## Optional - [All Posts](https://paragraph.com/@harpy-wings/): Complete post archive - [Sitemap](https://paragraph.com/@harpy-wings/sitemap-index.xml): XML sitemap for crawlers