Solidity Smart Contract Developer
$138,000–$181,700 year
Remote
RemoteFull Time$138,000–$181,700 yearMid LevelSmall
Full TimeMid LevelSmall
Job Summary
Design and implement NFT marketplace smart contracts including BEP-721/1155 minting, trading logic, and a staking engine with per-second reward accrual. Build on-chain payment and settlement contracts for SmartCommerce, integrating escrow mechanisms and off-chain fulfillment triggers. Write comprehensive test suites, optimize gas usage, and coordinate with auditors to remediate security issues before mainnet deployment. Maintain and extend existing staking contracts for the live mining ecosystem. Own contract architecture across greenfield products while ensuring clean code and clear documentation.
Required Qualifications
- 2+ years writing production Solidity with deployed, verified contracts
- Strong understanding of smart contract vulnerabilities — reentrancy, integer overflow, oracle manipulation, front-running, access control issues
- Hands-on experience with Hardhat or Foundry
- Familiarity with OpenZeppelin contracts and EVM token standards (ERC-20, ERC-721, ERC-1155)
- Ability to reason about tradeoffs between gas optimization, security, and code readability
- Clear written communication in English for async collaboration
Desired Qualifications
- Prior work on staking protocols, reward distribution systems, or NFT marketplaces
- Experience preparing for or completing a third-party audit (CertiK, PeckShield, Trail of Bits, OpenZeppelin)
- Familiarity with IPFS or Arweave for decentralized metadata storage
- Full-stack blockchain developers with strong Solidity depth
- Experience with formal verification or advanced fuzz testing (Echidna, Foundry fuzzing)
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