Blockchain Developer

OpenSea

$30-50[Hourly]
Remote3-5 Yrs ExpBachelorContract
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Remote Details

Open CountryNorth America

Language RequirementsEnglish

This remote job is open to candidates in specific countries. Please confirm if you want to continue despite potential location restrictions

Job Description

Description

Project Overview:

We’re building a next-gen NFT marketplace with a 12-month roadmap. The platform will launch with essential NFT features like minting, listings, wallet integration, and royalties – then expand into multi-chain support, gated content, and creator tools.


We’re aiming for a 4-6 month MVP, followed by iterative releases focused on growth, UX improvements and feature depth.


Timeline-Based Roadmap:

Phase 1 (Months 1–4): MVP Build.

- ERC-721/1155 minting, fixed-price listings.

- MetaMask / WalletConnect integration

- NFT metadata handling via IPFS

- Marketplace UI (React-based)

- Deploy to Ethereum testnet & mainnetPhase 2 (Months 5–8): Core Feature Expansion

- Auction smart contracts

- Royalty support (EIP-2981)

- Admin panel & dashboard

- Mobile optimization

- Security audit & gas optimization


Phase 3 (Months 9–12): Advanced Functionality

- Multi-chain support (Polygon, Arbitrum)

- Token-gated content

- Creator profiles & lazy minting

- Integration with OpenSea, Alchemy, or Moralis APIs


Responsibilities

  • Write & deploy Solidity smart contracts
  • Connect frontend (React) with smart contracts
  • Optimize gas usage, ensure upgradeability
  • Collaborate with frontend/dev team
  • Manage CI/CD for smart contract deployment
  • Support audits and test coverage

Requirements

Required Skills

- Solidity + Smart contract development (2–4+ yrs)

- Deep knowledge of ERC-721, ERC-1155, EIP-2981

- Experience with Web3.js or Ethers.js

- Hardhat / Foundry / OpenZeppelin stack

- Mainnet/testnet deployment experience

- Self-driven, team-friendly, and reliable


Bonus Points:

- Multi-chain experience (Polygon, Arbitrum, etc.).

- Familiar with OpenSea SDK, Moralis, Alchemy.

- NFT governance, fractional NFTs, or DAOs.

- Backend experience with Node.js (for metadata/server logic)

Web3.jsERC-721
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Rodrigo Pagac

HR ManagerOpenSea

Just replied

Posted on 01 July 2025

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