Senior Smart Contract & Blockchain Architect

Jitender Singh

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Senior Smart Contract & Blockchain Developer with over 6 years of hands-on experience building DeFi protocols, NFT platforms, and cross-chain systems. Comfortable working across Ethereum and Layer-2 networks, with practical experience in AMMs, CDP lending models, governance workflows, and NFT standards like ERC-721, ERC-1155, ERC-4626, EIP-2981, and EIP-2771. Have designed and shipped upgradeable contract architectures (UUPS, Transparent Proxy, Beacon) and handled security reviews and audits throughout development. Well-versed with Hardhat, Foundry, OpenZeppelin, Ethers.js, and cross-chain frameworks including LayerZero and Wormhole. Have integrated major DeFi protocols such as Aave, Compound, Curve, and Balancer, and focused on optimizing contracts for gas efficiency and maintainability. Used to working closely with product and frontend teams to deliver clean, reliable on-chain logic across Ethereum, Polygon, Arbitrum, Optimism, and newer ecosystems. SKILLS SUMMARY

Languages:Solidity, JavaScript, Typescript, Rust, C++ Libraries:Hardhat, Foundry, OpenZeppelin, Chai, Mocha, Waffle, Slither, Tenderly Tools:Encryption, hashing, digital signatures, and zero-knowledge circuits Soft Skills: Excellent communication, Troubleshooting, problem-solving, Team Management, decision-making Chains: ETH, BNB, BASE, LINEA BTC, Solana SUI, hyperledger, Hyperliquid, BNB, R3 Corda, zkEVM WORK EXPERIENCE

HyperPNL January 2024 – Present

Senior Smart Contract Developer

● Intent-Based Systems: Designed and implemented intent-driven architectures for blockchain applications, mapping high-level user intents into executable blockchain actions. Leveraged NLP models for intent classification and entity extraction to improve usability.

● DeFi Architecture: Engineered core DeFi components, including transparent proxy patterns, ERC-4626 vault integrations, and DAO governance structures, ensuring scalability and alignment with business objectives.

● Innovative Smart Contracts: Developed time-aware algorithms and Solidity data structures, integrating MEV-Time oracles to securely access and validate future data points, strengthening overall protocol design.

● Research & Development: Investigated privacy-preserving techniques for smart contracts to safeguard user data, comply with evolving regulations, and push forward innovation in decentralized architectures.

● Developed on-chain trading logic and supporting off-chain services to handle high-frequency interactions, liquidity management, and reliable execution across multiple blockchain networks.

● Decentralized Oracles: Explored and integrated decentralized oracle solutions to deliver reliable, tamper-resistant data feeds for MEV-Time–based applications.

● Intent Recognition: Designed methods for classifying user intents based on transaction patterns and contextual data, enabling more intuitive blockchain interactions.

● Security & Audits: Implemented robust security measures against MEV exploits and contract vulnerabilities. Collaborated with external auditors to conduct regular reviews, ensuring enterprise-grade security standards.

● Gas Optimization: Optimized smart contract logic and storage patterns, achieving up to 25–30% reduction in gas costs, making protocols more efficient and user-friendly.

● Experience working with Rust-based smart contracts and blockchain modules, particularly during audits, integrations, and protocol research for cross-chain deployments.

● Utilized Python and Golang extensively for scripting, monitoring, oracle validation pipelines, and automated testing frameworks to support DeFi and cross-chain platforms.

● Ecosystem Collaboration: Partnered with external protocol teams and research groups to align on interoperability standards, accelerating adoption of cross-chain frameworks.

● Developer Tooling: Created internal tooling and testing frameworks to streamline contract development, simulation, and automated verification.

● Mentorship & Leadership: Mentored junior blockchain engineers on Solidity and Solana best practices, secure coding, and smart contract design, fostering a culture of quality and innovation.Built and deployed production-grade decentralized applications by integrating Solidity smart contracts with Node.js backends and React/Next.js frontends using ethers.js and web3.js Nervos June 2022 – January 2024

Senior Smart Contract Developer

● Decentralized Oracles: Developed oracle integrations using Chainlink and Pyth Network to deliver accurate, tamper-proof price feeds with cryptographic proofs, ensuring high integrity of financial data in smart contracts.

● Cross-Chain Interoperability: Evaluated Arbitrary Message Passing (AMP) protocols like LayerZero and Wormhole, analyzing architectures, performance, and security trade-offs to guide cross-chain design decisions.

● Algorithmic Interest Rates: Engineered interest rate models inspired by Compound Protocol, leveraging supply-demand dynamics with automated adjustments from on-chain data feeds.

● Collateralized Lending: Contributed to a collateralization protocol on BNB Chain, enabling overcollateralized borrowing through smart contracts managing ratios and liquidation flows.

● DeFi Infrastructure: Designed and developed Token Converters, ERC-4626 vaults, and Governance Bravo contracts, integrating TWAP and Chainlink oracles for robust price data.

● Ethereum Standards: Implemented multiple Ethereum Improvement Proposals (EIPs 20, 721, 1155), enhancing contract interoperability and token functionality.

● On-Chain Liquidity: Built an Automated Market Maker (AMM) for perpetual futures, optimizing for dynamic liquidity provisioning and slippage management.

● Security & Audits: Conducted internal audits with MythX and Slither, identifying vulnerabilities and significantly improving platform resilience.

● Prototyped Go-based services and modules supporting intent execution engines and off-chain coordination layers inspired by Cosmos SDK module architecture.

● Applied IBC-style message passing concepts for secure cross-chain intent routing and settlement verification.

● Used Python tooling for simulation testing, oracle-data validation, and monitoring workflows.

● Scalability: Deployed solutions across Layer 2 networks (Polygon, Arbitrum, Optimism) to ensure low-cost, high-throughput transactions.

● Cross-Chain Token Standardization: Created a Unified ERC-20 Token with LayerZero, enabling seamless transfers, burns, and mints across chains while maintaining balance consistency (tested on Goerli & Fuji).

● Developer Ecosystem: Leveraged advanced tooling (Ethers.js, Hardhat, OpenZeppelin, fx-portal, GraphQL, libp2p, Chai/Mocha) to streamline development, testing, and protocol integrations. Indorse May 2019 – January 2021

Smart Contract Developer

● Developed and maintained core NFT smart contracts using ERC-721 and ERC-1155 standards, enabling secure minting, trading, and metadata management for large-scale digital asset collections.

● Refactored and modularized monolithic asset contracts, improving gas efficiency and scalability of NFT transfers and batch operations within the platform ecosystem.

● Implemented contract upgradeability (Transparent & UUPS proxy patterns) and migrated existing NFT data on-chain, ensuring backward compatibility and seamless user transition without service disruption.

● Integrated Layer-2 scaling on Polygon, extending NFT minting and marketplace interactions to reduce gas fees and enhance transaction throughput.

● Built a decentralized NFT marketplace (Rarible-inspired) supporting asset listing, bidding, and settlement flows using platform-native ERC-20 tokens.

● Implemented meta-transaction support (EIP-2771) enabling gasless user interactions, reducing onboarding friction and improving user acquisition.

● Performed internal smart contract audits, identified vulnerabilities, and applied best-practice mitigations to strengthen protocol security and production reliability.

● Developed event-indexed subgraph services using The Graph Protocol to power real-time querying of NFT ownership, listings, and trading activity, improving frontend data consistency and performance.

● Wrote comprehensive unit and integration tests using Hardhat + Waffle + TypeScript, achieving high test coverage and ensuring reliable contract behavior across mainnet and testnet deployments.

● Collaborated with product and design teams to define smart contract APIs and transaction flows, ensuring seamless integration between on-chain logic and frontend UI/UX.

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