Senior Blockchain Developer

highly experienced Backend + Smart Contract Developer

Key Responsibilities

• Smart 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 Qualifications

• 4+ 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 Qualifications

• Experience 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.

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