catman678
Senior Solidity Engineer
3 years of blockchain development in smart contracts and Go backend — vault, staking, lending; on-chain and off-chain architecture.
Hands-on with EVM : accounts, blocks, transactions, consensus, event logs .
Understand DeFi: CEX/DEX, staking, lending; Uniswap, Aave, OpenSea; settlement and liquidation.
My Stack: Solidity, Foundry, OpenZeppelin, Solmate, Go, MySQL, Redis, Kafka, Prometheus, Java, Python.
AI-assisted: Cursor / DeepSeek, etc. across the project workflow, including requirements, architecture optimization, module development, testing, etc.
Currently open to full-time Solidity / Go roles in DeFi.
Experience: 3 years
Yearly salary: $130,000
Hourly rate: $60
Nationality: 🇨🇳 China
Residency: 🇨🇳 China
Experience
Solidity Engineer
Exactly 2025 - 2026
● Built Market / Auditor lending: floating ERC-4626 vault plus 4-week fixed pools, with shared accounting and liquidation ● Floating deposits mint shares; yield accrues as the exchange rate rises; fixed demand above supply is funded by the floating pool ● ETH router for native deposit/borrow/repay/withdraw with auto wrap/unwrap ● Flash-loan leverage via Balancer and Permit2; roll size across fixed and floating in one tx ● AccessControl, pause/freeze, Timelock + multisig, transparent proxy on critical contracts
Solidity & Go Engineer
YieldNest 2023 - 2025
● Built ERC-4626 aggregator vaults for LRT restaking and RWA lending; shares priced in a unified base asset ● Pluggable strategies (restaking, RWA); funds to Safe; loans split into principal / interest / fees via Flow ● Go indexer: multi-chain event sync, confirmation delay, reorg rollback on Ethereum and BNB ● MySQL + Redis for positions, TVL, APY; indexes cut query time by 60%; cache lag under 500 ms ● Rebalancing alerts, ops console, Prometheus/Grafana for scan rate, reorgs, and vault pause
Skills
assembly
golang
java
linux
python
solidity
english
chinese-mandarin