Senior Blockchain Developer

6 days ago

Delhi, India USquare Full time

Hiring: Senior Backend + Smart Contract Developer (Web3)We’re looking for ahighly experienced Backend + Smart Contract Developerwith a strong grasp of blockchain architecture and mid-level AWS expertise to join our innovative Web3 team. This is your chance to design and build cutting-edge decentralized systems that scale globally.Key ResponsibilitiesSmart Contract Development:Architect, develop, and deploy secure smart contracts (Solidity / Rust) for Ethereum, EVM-compatible chains, and other L1/L2 networks.Conduct in-depth testing, auditing, and gas optimization.Backend Engineering & Blockchain Architecture:Design high-performance backend systems and scalable blockchain architectures.Build and maintain APIs, node integrations, and indexing services (e.g., The Graph, Alchemy, Infura).Cloud & Infrastructure (AWS):Deploy and manage backend services using AWS (EC2, Lambda, API Gateway, S3, RDS) and cloud best practices.Implement CI/CD pipelines, containerization (Docker, Kubernetes), and monitoring solutions.Security & Optimization:Ensure system security, resilience, and gas optimization.Apply best practices for mitigating vulnerabilities (reentrancy, overflow, etc.).Collaboration & Ownership:Work closely with frontend, DevOps, and product teams to deliver robust end-to-end blockchain products.Take complete ownership from architecture to deployment.Must-have Qualifications4+ years in backend development and 2+ years in smart contract development.Deep understanding of Ethereum, EVM architecture, L2 scaling solutions, and DeFi/NFT standards (ERC20, ERC721, ERC1155).Proficiency in Solidity, JavaScript/TypeScript, Node.js, and at least one systems language (Go, Rust, or C++).Strong experience in blockchain solution architecture for scalable dApps.Mid-level experience with AWS (EC2, Lambda, API Gateway, S3, RDS).Familiarity with common smart contract vulnerabilities and mitigation strategies.Proven ability to deliver secure, scalable, production-ready blockchain systems.Preferred QualificationsExperience with Hardhat, Foundry, Truffle, Web3.js / Ethers.js.AWS DevOps experience for blockchain-based apps, including CI/CD pipelines and container orchestration.Cross-chain development and interoperability protocol expertise.Knowledge of zero-knowledge proofs (ZK-SNARKs/STARKs).Experience with audited DeFi protocols.Familiarity with L2 rollups, bridges, and advanced blockchain scaling techniques.Exposure to NFTs, DeFi mechanics, and modern blockchain infrastructure.Location:Remote / Hybrid (India preferred)Type:Full-time

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