Senior Solidity Engineer (DeFi Vaults) - Fulltime - Worldwide

Description:

We need an expert Solidity dev to model and build an ERC-7540-style vault from scratch. You’ll design the logic, test it under extreme conditions, and deliver clean, production-ready code, fast.

What you’ll do:

• Model vault interactions (deposits, withdrawals, accounting).
• Write efficient Solidity contracts (ERC-7540 compliant).
• Run invariant and fuzz tests (Foundry preferred).
• Document architecture and testing assumptions.

What we’re looking for:

• Deep DeFi experience (vaults, AMMs, lending, yield).
• Mastery of Solidity + EVM internals.
• Strong background in fuzz/invariant testing and contract modelling.
• Proven on-chain deployments or audit-level work.

Nice to have:

• Foundry wizardry, gas optimisation chops, open-source DeFi repos.

Deliverables

• Build smart contract model according to our specifications
• Develop ERC-7540 Vault using Solidity
• Ensure smart contract security and efficiency
• Collaborate with team to integrate vault into existing systems