Founding Engineer

Summary

Join Sei Labs' Monaco team as a Founding Engineer and contribute to the core engineering efforts behind Monaco’s CLOB (Central Limit Order Book), supporting both spot trading and perpetual futures trading instruments. Build and optimize low-latency trading infrastructure, both on and offchain. Lead smart contract development for Monaco’s EVM-based perpetuals product using Solidity. Improve the performance of order matching systems, focusing on latency and reliability. Ship production code for Monaco v1 and lead explorations into v2 architecture with Sei Labs. The ideal candidate will have 3+ years of experience building low-latency trading systems across TradFi and DeFi stacks, experience with Rust and Solidity, and a strong understanding of DeFi strategies and institutional users.

Requirements

• 3+ years of engineering experience, building low latency trading systems, ideally across both TradFi and DeFi stacks
• Have worked at or adjacent to HFT firms (e.g., Citadel, Cubist, AQR, Jump, HRT) or were part of early engineering teams at CLOB protocols/perp DEXs (like dYdX, Hyperliquid, Vertex)
• Bring experience in Rust and Solidity, with the ability to navigate low-level systems and smart contracts
• Have built or traded DeFi strategies and understand the nuances of institutional users, market structure, performance optimization, and gas fees
• Must be based in NYC or willing to relocate

Responsibilities

• Contribute to the core engineering efforts behind Monaco’s CLOB (Central Limit Order Book), supporting both spot trading and perpetual futures trading instruments
• Build and optimize low-latency trading infrastructure, with both on and offchain nuances
• Lead the smart contract development for Monaco’s EVM-based perpetuals product (Solidity)
• Improve performance of order matching systems with a strong focus on latency and reliability
• Ship production code for Monaco v1 and lead explorations into v2 architecture with the Sei Labs