Solidity Developer

Tech: Node.js, Solidity, AI APIs, Docker, AWS, Hardhat • Built custom indexers and backend services to aggregate and structure on-chain and external data using event-based pipelines. • Worked with RAG (Retrieval-Augmented Generation) systems to structure large, heterogeneous datasets and deliver relevant context to internal consumers. • Contributed to internal infrastructure for data ingestion, enrichment, and experimentation, focusing on flexibility and modularity. • Improved backend performance through job queues, batching, and cache layers, ensuring resilience under high request volumes. • Delivered backend modules integrated with external blockchains and third-party services, focusing on maintainability and rapid iteration.

Tech: Node.js, Solidity, Go, React, PostgreSQL, AWS, Hardhat, Elixir, Blockscout, Docker, CI/CD Designed and shipped a decentralized lending protocol using Uniswap V3 LP positions as collateral • Implemented time-weighted collateral ratios, custom liquidation thresholds, and Chainlink-based oracle pricing • Successfully audited by Halborn Developed a cross-chain token bridge in two phases • Initial version — backend-driven, with deposit events automatically triggering issuance on the destination chain • Later version — upgraded to EIP-712 signature validation for secure, decentralized claim processing Engineered a high-frequency trading bot for BNB Chain • Focused on mempool sniping, gas strategy optimization, and low-latency execution via private nodes • Achieved up to $200k/week profit during high-volatility periods Built an EVM-compatible blockchain (based on BSC) • Tuned consensus parameters, deployed Uniswap V2, implemented custom staking logic • Integrated Blockscout with upstream compatibility patches Led internal DeFi R&D prototyping • Explored synthetic assets, modeled liquidation mechanics, and analyzed LP profitability • Contributed to long-term architectural decisions and protocol direction Built smart contracts for a staking game with NFT mechanics • Combined ERC-721 and ERC-1155 standards with on-chain staking and unlockable rewards • Designed hybrid accounting logic to support complex game flows Created a Chrome Extension for real-time NFT collection tracking • Aggregated data from OpenSea and LooksRare with rotating proxies and batch metadata fetching • Bypassed API rate limits to maintain live, reliable updates Forked and extended a Lisk/ARK-based blockchain • Modified core node and wallet logic • Added custom transaction types and optimized storage layout for NFT/game integrations

Tech: Node.js, HTML, MongoDB Built a backend system for analyzing Bitcoin transaction flows • Focused on address clustering and tracing fund propagation • Processed over 2.5 TB of raw blockchain data using batch jobs and worker_threads • Leveraged sharded MongoDB clusters to reduce analytic query time from hours to minutes Developed internal tools for visual fund-flow investigation • Created a lightweight web interface using HTML and D3.js • Built custom graph visualizations to map transactional links and propagation paths • Reduced investigator triage time by 45% Handled full-stack deployment across dedicated VPS infrastructure • Manually configured servers, managed storage distribution, and monitoring • Deployed without Docker or containerization, focusing on fine-grained control and performance