Blockchain Developer

Company DescriptionDX Blockchain Group FZCO is a blockchain development company focused on building decentralized applications, smart contracts, white-label NFT marketplaces, and secure blockchain infrastructure. The company helps businesses turn blockchain technology into practical products through architecture, development, security, deployment, and ongoing technical support. As demand grows for decentralized finance, tokenized products, digital ownership, smart contract automation, and Web3 applications, DX Blockchain Group is expanding its blockchain engineering capabilities. Role DescriptionWe are hiring a Blockchain Developer to design, build, test, and maintain smart contracts, decentralized applications, wallet integrations, and blockchain-based products. This is a full-time technical role intended for developers with direct cryptocurrency or Web3 experience. Candidates should understand how public blockchains, wallets, transactions, gas fees, token standards, decentralized applications, and smart contracts operate in production. General software development experience without practical blockchain knowledge will not be sufficient for this position. Candidates must be legally authorized to work remotely from the United States.

Responsibilities

Design, develop, test, deploy, and maintain production-grade smart contracts and decentralized applicationsBuild blockchain products across DeFi, NFT marketplaces, tokenized assets, wallets, payments, digital ownership, and Web3 infrastructureDevelop secure smart contracts using Solidity and modern Ethereum development frameworksIntegrate frontend and backend applications with blockchain networks, wallets, RPC providers, indexers, and smart contract APIsImplement token standards such as ERC-20, ERC-721, ERC-1155, permit-based approvals, and upgradeable contract patterns where appropriateBuild wallet connectivity using technologies such as MetaMask, WalletConnect, ethers.js, viem, or web3.jsWrite automated unit, integration, fork, and end-to-end tests for smart contracts and blockchain workflowsReview smart contracts for reentrancy, access-control errors, oracle manipulation, arithmetic issues, front-running exposure, signature vulnerabilities, and other security risksOptimize smart contract architecture and gas usage without compromising readability, maintainability, or securityWork with blockchain explorers, testnets, local nodes, RPC providers, decentralized storage systems, and on-chain data servicesParticipate in technical architecture discussions, code reviews, documentation, deployment planning, and incident investigationMonitor protocol upgrades, Ethereum improvement proposals, blockchain security incidents, developer tooling, and emerging Web3 standardsCollaborate with product, design, security, infrastructure, and client-facing teams to translate

requirements

into reliable blockchain products

Qualifications

Professional experience developing smart contracts, decentralized applications, blockchain infrastructure, or cryptocurrency productsStrong proficiency in Solidity and practical knowledge of the Ethereum Virtual MachineExperience using Foundry, Hardhat, or another professional smart contract development and testing frameworkExperience integrating applications with wallets, smart contracts, RPC endpoints, blockchain explorers, and on-chain dataUnderstanding of Ethereum transactions, calldata, events, gas, nonces, signatures, private and public keys, contract storage, and transaction finalityUnderstanding of common smart contract vulnerabilities and secure development practicesFamiliarity with DeFi, token standards, decentralized exchanges, liquidity pools, staking, multisignature wallets, bridges, oracles, and governance systemsProficiency in JavaScript or TypeScript and experience with Node.jsExperience using Git, GitHub, automated testing, pull-request workflows, and continuous integrationAbility to explain previously developed blockchain products, deployed contracts, or meaningful open-source Web3 contributionsStrong debugging, documentation, communication, and problem-solving skillsPreferred BackgroundExperience deploying and maintaining smart contracts on Ethereum mainnet or established Layer 2 networksExperience with Base, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, or SolanaFamiliarity with OpenZeppelin Contracts, Safe, Chainlink, The Graph, IPFS, Alchemy, Infura, QuickNode, Tenderly, Slither, Mythril, or similar toolsExperience developing DeFi protocols, NFT marketplaces, tokenization platforms, blockchain payments, custody workflows, or wallet applicationsUnderstanding of account abstraction, cross-chain messaging, upgradeable contracts, multisignature governance, zero-knowledge systems, or decentralized identityExperience performing smart contract reviews, responding to security findings, or working with external auditorsPublic GitHub repositories, verified contract addresses, technical writing, hackathon projects, or open-source blockchain contributionsBackground in computer science, software engineering, cybersecurity, mathematics, or a related technical discipline

Benefits

Remote work environment for candidates based in the United StatesOpportunity to build real blockchain products including smart contracts, dApps, NFT marketplaces, wallets, and tokenized applicationsExposure to blockchain architecture, smart contract security, Web3 infrastructure, DeFi, and digital ownershipCollaborative technical environment involving blockchain engineers, product teams, security specialists, and Web3 professionalsOpportunities for professional development in smart contract engineering, protocol design, blockchain security, and decentralized application architectureCompensationSalary range: $90,000 - $95,000 USD per year depending on blockchain engineering experience, smart contract expertise, security knowledge, and production deployment historyPerformance-based incentives and additional bonus opportunities may also be available