Blockchain Jobs in New York, New York, United States

Blockchain/web3 Engineer

New York City, NY

Contract

Job Description:

Must Have Technical/Functional Skills:

Core Web3 / Blockchain Skills (Must-Have)

• Strong understanding of blockchain fundamentals:

o transactions, blocks, gas/fees, wallets/keys, RPC, finality, consensus basics

• Hands-on experience with smart contracts:

o Solidity (preferred) and development tooling (Hardhat/Foundry/Truffle/Remix)

Experience working with EVM-based chains (Ethereum/Polygon/Arbitrum/Optimism/BSC)

or enterprise chains (Hyperledger Fabric/Corda/Quorum) depending on project

Roles & Responsibilities

• Smart Contract Engineering & Web3 Development
• Design, develop, and maintain smart contracts (Solidity/Vyper or relevant stack) aligned to product and security requirements.
• Build backend/Web3 components for contract interaction:
• Transaction orchestration, signature flows, nonce management, gas strategies
• Web3 SDK integrations
• Develop and manage contract deployment pipelines, including ABI/versioning, migrations, upgrade strategies (proxy patterns), and release coordination.

Implement secure patterns for contracts:

Support smart contract testing:

• Node Operations & Infrastructure
• Deploy, configure, and operate blockchain nodes and supporting infrastructure:
• Full nodes/archival nodes, RPC endpoints, validator nodes (as applicable)
• Manage node upgrades, chain configuration changes, and incident response for production networks.

Implement operational tooling for:

• Node health checks, RPC performance monitoring, log aggregation, and alerting
• Handle blockchain-specific reliability concerns:
• Re-org handling, finality considerations, peer connectivity, RPC failover, rate limiting