Open-minded software engineer with 4 years of professional experience and a strong passion for the Web3 ecosystem. Possesses a deep understanding of DeFi concepts and is continuously working toward building innovative and impactful DeFi protocols. Eager to learn and quick to adapt in the fast-evolving Web3 landscape, while consistently balancing security and efficiency in product development.
Smart Contract Engineer
- Design, develop, and maintain secure and efficient EVM-based smart contracts
- Write comprehensive unit and integration tests with gas optimization
- Participate in protocol and architecture design with focus on security, upgradeability, and decentralization
- Conduct code reviews and vulnerability analysis across the entire smart contract lifecycle
DeFi Protocol Expertise: Deep understanding of Uniswap V2/V3, Aave V3, Liquid Staking Protocols (LSP), and EigenLayer - including underlying logic, source code analysis, and secondary development.
October 2024 - February 2025
An incentive-based marketing platform featuring tokenized real-world engagement and application-level Proof-of-Work for event participation.
- Developed comprehensive tokenomics model with ERC20 token and NFT-based role differentiation
- Built "application-level Proof-of-Work" module with dynamic event logic and reward settlement
- Designed and implemented staking protocol with differentiated APYs based on user activity and lock-up duration
- Created NFT system for user role management and privilege assignment
- Integrated real-world event participation with on-chain value generation
Tech Stack: Solidity, ERC20, ERC721, Staking Mechanisms, Tokenomics Design
Repository: [PLACEHOLDER_URL]
March 2025 - June 2026
A funding pool-based cross-chain bridge infrastructure enabling seamless token transfers between EVM networks with decentralized relay architecture.
- Developed liquidity pool module for native and ERC20 token management
- Built messaging layer establishing transaction linkage between source and destination chains
- Participated in Gas Oracle service development for cross-chain fee calculation
- Contributed to decentralized off-chain relayer network integrated with on-chain contracts
- Implemented secure token receipt and release mechanisms across chains
Tech Stack: Solidity, Go, Cross-chain Communication, Gas Optimization, Decentralized Relayers
Repository: [PLACEHOLDER_URL]
July 2025 - January 2026
A Layer 2 infrastructure that combines PoS security with Layer 1 LSP participation, enabling dual yield generation from L2 consensus rewards and L1 staking rewards.
- Built Layer 2 PoS module with economic model supporting Stakers and Operators
- Implemented cross-chain bridge for transferring staked tokens to Layer 1 LSP
- Developed Layer 1 LSP integration with mining pools for validator activation
- Enabled potential restaking through protocols like EigenLayer for additional yield
- Designed reward distribution and penalty enforcement at consensus layer
Tech Stack: Solidity, Cross-chain Bridges, PoS Economics, LSP Integration, EigenLayer
Repository: [PLACEHOLDER_URL]
Smart Contract Engineer | Dolphinnet | October 2024 - Present Designing and developing secure EVM-based smart contracts for DeFi protocols and infrastructure
Software Engineer | West Image LTD | September 2021 - October 2024 Delivered .NET-based solutions, managed full-stack feature development, and handled client deployments
I'm always open to discussing DeFi protocols, smart contract security, and Web3 innovation.
Email: yuchengsong813@gmail.com
Building the future of Web3, one smart contract at a time 🚀