hxsimo

Designed and implemented a Data Context Retrieval (DCR) system to enrich AI agent reasoning with relevant memory and document-based context. Built pipelines for file ingestion, including chunking, embedding, and vector storage using PostgreSQL with pgvector. Developed a MemoryAgent and DocumentAgent architecture to retrieve and rank relevant context via semantic similarity. Wrote SQL queries and indexing strategies to support fast and scalable vector search across memory and document tables. Created unit tests to ensure robust context indexing, retrieval accuracy, and correct interaction with the vector database.

Designed, developed, and maintained a MEV bot targeting arbitrage and sniping opportunities across EVM-compatible networks. Implemented core logic in Rust for high-performance on-chain data processing, mempool scanning, and transaction simulation. Continuously monitored performance, adjusted strategy heuristics, and improved latency-sensitive components for better competitiveness in high-speed environments.

Designed and implemented plug-and-play Starknet full nodes, focusing on reliability, performance optimization, and ease of deployment for developers and institutions. Contributed to LayerX infrastructure on Starknet, with a particular focus on bridging mechanisms and execution layer integrations. Audited and reviewed smart contracts for Barknet, a hybrid LayerX protocol combining Starknet and Bitcoin primitives, including DEX contracts and bridging logic. Acted as a mentor at a Starknet Hacker House, guiding teams on Cairo development, Starknet architecture, and best practices for secure smart contract design. Collaborated with core protocol contributors and open-source maintainers to improve tooling, node configuration standards, and ecosystem documentation.

Led a cross-functional team of developers and designers to build a Telegram bot enabling multichain token sniping, trading, bridging, and staking. Designed and developed smart contracts and backend logic for seamless multichain interactions, leveraging LayerZero for interoperability. Implemented automated trading features and token sniping mechanisms with real-time mempool monitoring across multiple EVM chains. Oversaw the deployment and lifecycle management of a LayerZero-based token, including contract deployment, bridging logic, and staking utilities. Defined the technical roadmap, coordinated development sprints, and ensured delivery of a reliable user experience in a high-frequency trading context.

Reviewed and finalized Solidity smart contracts for multichain deployment (e.g., Ethereum, Polygon, BNB Chain). Wrote and maintained deployment and upgrade scripts across multiple networks. Integrated smart contract interactions into a multichain front-end (using Web3/ethers.js). Connected the contracts to The Graph, designing and deploying subgraphs for efficient indexing.