Senior Web3 Engineer

4 days ago

Bengaluru, Karnataka, India Etta Global Partners Full time ₹ 20,00,000 - ₹ 25,00,000 per year

We are seeking a highly experienced Senior Web3 Developer with deep expertise in blockchain protocols, smart contract development, and security practices. The ideal candidate will have hands on experience across multiple chains and ecosystems, including Aptos, Arbitrum, OKX, Bitcoin Taproot, and strong knowledge of Layer 1 and Layer 2 networks. This role requires proficiency in Solidity and Move for smart contracts, advanced knowledge of bridging and interoperability, and a strong understanding of security threats and mitigation strategies in DeFi.

Key Responsibilities

Smart Contract Development & Deployment

  • Design, develop, and deploy secure smart contracts using Solidity and Move (.move).
  • Implement cross-chain functionality, bridges, and interoperability solutions.
  • Optimize smart contracts for gas efficiency, scalability, and security.

Blockchain Infrastructure

  • Set up, run, and maintain nodes and staking environments across multiple blockchains (L1 & L2).
  • Contribute to protocol integration with Aptos, Arbitrum, OKX, BTC Taproot, and other ecosystems.

Security & Auditing

  • Conduct in-depth smart contract audits, both manual and with tools (e.g., Slither, MythX, Echidna, Foundry).
  • Identify and mitigate vulnerabilities such as diamond attacks, civil attacks, sandwich attacks, MBV (Miner/Maximal Extractable Value) and other exploits.
  • Implement best practices for contract upgradability and secure protocol design.

Zero-Knowledge Proofs & Cryptography

  • Develop and integrate ZK-proof systems for privacy-preserving transactions.
  • Collaborate with researchers and engineers on novel cryptographic solutions.

Collaboration & Documentation

  • Work closely with product, security, and research teams to deliver robust blockchain solutions.
  • Create detailed technical documentation and contribute to internal knowledge sharing.

Skills & Experience

  • 8+ years in software development, including 5+ years in blockchain development.
  • Programming Languages: Solidity, Move (.move), Rust, JavaScript/TypeScript, Python (preferred).
  • Blockchain Expertise: Aptos, Arbitrum, OKX, BTC Taproot, Ethereum, Layer 1 & Layer 2 solutions.
  • Smart Contracts & Security: Strong grasp of bridging, contract patterns, and vulnerabilities (reentrancy, diamond, sandwich, MBV, etc.).
  • Auditing Tools: Familiarity with tools like Slither, MythX, Foundry, Tenderly, Echidna, Certora.
  • Infrastructure: Node setup, validator operation, staking mechanisms, RPC management.
  • Cryptography: Understanding of ZKPs, elliptic curve cryptography, and consensus mechanisms.
  • Problem Solving: Ability to diagnose complex blockchain issues and propose scalable solutions.

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