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Joshua Shen

@joshuashen

Message

I build production blockchain protocols, smart contracts, and high-performance Rust trading systems.

China

Message

I've built production blockchain systems across National Health and Sahara AI, from ERC-3643 RWA compliance and ERC-4337/EIP-7702 gas abstraction to modular EVM contracts connecting AI inference with on-chain settlement.

Previously, I migrated a legacy trading engine to high-concurrency Rust and improved CEX integration time to under 24 hours. My work spans consensus research, Filecoin cryptography, MPC wallet infrastructure, transaction indexing, and reliable blockchain backend systems.

Experience

Work history, roles, and key accomplishments

Current

Blockchain Solutions Engineer

Current

National Health

Nov 2025 - Present (10 months)

Architected an ERC-3643-based RWA compliance framework and designed a gas abstraction architecture combining ERC-4337 and EIP-7702. Contributed to MPC wallet infrastructure and conducted multi-chain and DeFi research.

Solidity Rust Go ERC 3643 Compliance ERC4337 EIP 7702 MPC EIP 1559 Ethereum BNB Chain Polygon BASE Arbitrum Solana TON Move Aave Morpho Chainlink Maker Cobo MPC

Blockchain Smart Contract Engineer

Sahara AI

Jun 2024 - Oct 2025 (1 year 4 months)

Served as Smart Contract Architect, designing and implementing modular EVM smart contracts based on EIP-6551 and EIP-3525. Advised on EVM architecture and EIP standards, and deployed off-chain services including Subgraph indexers and blockchain explorers.

Solidity Foundry Hardhat EIP 6551 EIP 3525 EVM Subgraphs Blockchain Explorers Morpho Story Protocol Uniswap

Quantitative Trading System Engineer

Asymmetric Technology Co., Ltd.

Nov 2022 - May 2024 (1 year 6 months)

Spearheaded migration of a legacy Python trading engine to a high-concurrency Rust architecture, reducing CEX integration time from weeks to under 24 hours. Engineered a hybrid WebSocket + REST event-driven architecture for order execution and state synchronization.

Rust Python TypeScript WebSockets REST CEX DeFi ZoomEx Injective

Rust Blockchain Backend Engineer

Shanghai Feipeng Technology Co., Ltd.

Jun 2021 - Sep 2022 (1 year 3 months)

Implemented and benchmarked Rust optimizations for Filecoin Proof-of-Replication, focusing on the sealing pipeline. Investigated Polkadot/Substrate protocol and implemented experimental modifications to NPoS consensus logic.

Rust Filecoin PoRep Substrate NPoS Docker Linux Venus