Senior Smart Contract & Web3 Engineer

GenixBit Labs Pvt. Ltd.; United States; Remote; USD 140,000 - 200,000; Full time

Benefits offered by this job

Health insurance

Job summary

GenixBit Labs Pvt. Ltd. is seeking a Senior Smart Contract & Web3 Engineer to develop and audit secure Solidity contracts for EVM chains, with emphasis on gas efficiency and zk integrations.

This full-time remote position collaborates across product and security teams, utilizing Foundry, Hardhat, Ethers.js, and Viem to deliver scalable, audited blockchain solutions and interoperable asset tracking.

Qualifications

• 4+ years of professional Solidity/EVM development.
• Deep knowledge of gas optimization and EVM assembly (Yul).
• Experience with Foundry, Hardhat, Ethers.js, and audit methodologies.
• Strong understanding of cryptographic primitives and decentralized architectures.
• Familiarity with ERC-20, ERC-721, ERC-1155 standards.

Responsibilities

• Architect gas-optimized Solidity contracts on EVM chains.
• Conduct automated security fuzzing, static analysis (Slither), and formal verification.
• Integrate contract state with frontends via Viem / Ethers.js and GraphQL Subgraphs.
• Deploy and manage decentralized oracle integrations and Layer-2 scaling bridges.

Skills

Solidity / EVM

Gas optimization

Cryptography

Auditing methodologies

Tools

Foundry

Hardhat

Ethers.js

Viem

Subgraphs

Job description

Senior Smart Contract & Web3 Engineer

Full-time Remote Global / USA Remote Senior $140,000 - $200,000 / year Posted: Oct 16, 2026 · Closes: Nov 5, 2026

About the Role

Develop and audit secure Solidity smart contracts on EVM chains, zero-knowledge proof integrations, and decentralized asset tracking protocols.

Key Responsibilities

• Architect gas-optimized Solidity smart contracts using Foundry and Hardhat
• Conduct automated security fuzzing, static analysis (Slither), and formal verification
• Integrate contract state with web frontends via Viem / Ethers.js and GraphQL Subgraphs
• Deploy and manage decentralized oracle integrations and Layer-2 scaling bridges

Requirements

• 4+ years professional smart contract development experience (Solidity / EVM)
• Deep understanding of EVM assembly (Yul), gas optimization, and ERC standards (ERC-20, ERC-721, ERC-1155)
• Experience with Foundry, Hardhat, Ethers.js, and audit methodologies
• Strong grasp of cryptographic primitives and decentralized architecture

Solidity Foundry TypeScript Ethers.js Viem Subgraphs