Solidity Engineer

We are hiring a Solidity Engineer who writes clean, elegant, rigorously tested smart contracts, and who cares about the craft.

You will own the development of Everlong’s on-chain systems, including:

• ERC-4626 vault architecture
• CDP & lending mechanics
• ALM integrations on top of Uniswap V3 & V4
• Yield + rebalance automation integration
• Protocol upgrades and new products on multiple chains (Berachain, Katana, etc.)

We need someone who moves with urgency, takes pride in their code, and treats testing and security as non-negotiable.

If you enjoy writing clean, expressive, gas-efficient code, this is your role.

Responsibilities

• Design and implement smart contracts across the whole stack
• Abstract onchain complexity to the Frontend team with SDK work (e.g. typescript ethereum libraries)
• Write extensive automated testing:
  • unit tests
  • fuzzing
  • invariant testing
• Collaborate with backend/infra execution engineer to connect vault logic to automation bots (rebalancing, arbitrage, liquidations).
• Maintain a strong security mindset (assertions, invariants, pre/post conditions).

Ship fast, iterate fast, improve fast.

Must-Have Qualifications

• 2+ years Solidity development

• Deep experience with ERC-4626 vaults

• Experience building CDP or lending systems

  (e.g., MakerDAO, Liquity, Curve Lend, Aave, Morpho, Euler, Gearbox)

• Comfortable with asset accounting, collateral ratios, utilisation, liquidations and other financial terminology.

• Expert testing discipline:

  • Ideally through Foundry.

• Gas optimization and clean code mindset (storage layout, calldata usage, natspec)

• Ownership mentality & high urgency

Nice to haves (Major advantages)

• Formal security/auditing experience
• Experience with Uniswap v3 / v4 hooks or concentrated liquidity mechanics
• Experience with ALMs / automated rebalancing designs (Charm, Gamma, Arrakis, Perennial)
• Background in MEV-aware design and execution flow optimization

Compensation

Base salary: Competitive (depends on seniority)

Equity + Tokens: core team alignment available.

Performance upside: Based on shipped features + value created

Team offsites: 2-3 times a year