Senior DeFi Engineer: Mainnet Staking, Vaults & Cross-Chain

Launch Legends Inc.; United States; Remote; USD 180,000 - 260,000; Full time

Job summary

Launch Legends Inc. is seeking a Senior Smart Contract Engineer to advance the Autheo platform on Mainnet, focusing on staking, fees, and THEO utility flows.

You will design and implement pools, vaults, and routing contracts, and ensure robust token accounting and emission controls. You'll work with cross-chain bridges, perform comprehensive testing with Foundry or Hardhat, and author audit scopes, ABI notes, and TypeScript SDKs for DevHub.

Qualifications

• 5+ years of experience shipping smart contracts that held value
• Proficiency in Solidity and EVM traces
• Experience with AMM, staking contracts, vaults, or bridge-adjacent pools
• Experience writing unit, fork, and invariant/fuzz test suites
• Bachelor's or Master's in Computer Science or equivalent practical depth

Responsibilities

• Develop staking, fee, and THEO utility flows on Mainnet
• Build pools, vaults, or routing contracts based on written designs
• Manage token accounting, supply, emissions, and pause mechanisms
• Implement cross-chain asset movement via existing bridges
• Ensure safety through Foundry or Hardhat, fuzz, or invariant testing
• Write audit scopes and provide ABI notes/SDKs in TypeScript for DevHub

Skills

Solidity

Smart contract development

EVM tracing

Auditing awareness

Education

Bachelor's or Master's in Computer Science or equivalent

Tools

Foundry

Hardhat

TypeScript

Job description

Launch Legends Inc. is seeking a Senior Smart Contract Engineer to advance the Autheo platform on Mainnet, focusing on staking, fees, and THEO utility flows.

You will design and implement pools, vaults, and routing contracts, and ensure robust token accounting and emission controls. You'll work with cross-chain bridges, perform comprehensive testing with Foundry or Hardhat, and author audit scopes, ABI notes, and TypeScript SDKs for DevHub.