Hardhat Web3 Jobs in United States

240 jobs found

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Job Position Company Posted Location Salary Tags

Belmont Lavan

United States

$54k - $87k

Belmont Lavan Ltd

United States

$54k - $87k

NeerInfo Solutions

Dallas, TX, United States

$87k - $112k

Flourish Health

United States

$60k - $120k

Odiin.

San Francisco, CA, United States

$98k - $100k

ether.fi

New York, NY, United States

$150k - $200k

Sei Development Foundation

New York, NY, United States

$77k - $84k

HIFI

New York, NY, United States

$110k - $140k

The Brixton Group

Boston, MA, United States

$87k - $117k

Realm

New York, NY, United States

$200k - $275k

SMASH

San Jose, CA, United States

$96k - $112k

SMASH

San Jose, CA, United States

$72k - $100k

Underground Administration LLC

Tampa, FL, United States

$54k - $110k

HAVOK LABS

United States

$65k - $1000k

TechnoSphere, Inc.

Jersey City, NJ, United States

$72k - $85k

Belmont Lavan
$54k - $87k estimated
TX Texas City US

We are seeking an experienced Blockchain / Web3 Developer who will design, build, test and deploy smart contracts, integrate them with front-end and back-end systems, and ensure high standards of security, performance, and usability. You will collaborate with product, UX, frontend, and backend teams to deliver production-ready features, contribute to architecture decisions, and continuously improve our Web3 stack.

Key Responsibilities

  • Design, write, and deploy secure smart contracts
  • Implement token standards (ERC-20, ERC-721, ERC-1155) and upgradeable contracts using libraries like OpenZeppelin
  • Optimise contracts for gas usage, performance, and security, including audits and peer reviews
  • Integrate Web3 libraries with front-end applications and wallets
  • Develop backend services / APIs that interact with on-chain and off-chain data.
  • Work with Layer 2 / roll-ups / scaling solutions, bridges, and/or cross-chain integrations where required
  • Write automated tests, maintain CI/CD pipelines, and ensure robust coverage and code quality
  • Maintain clear technical documentation, and mentor more junior engineers


Requirements

  • 5 - 8+ years experience in blockchain / Web3 development
  • Strong Solidity skills; experience with EVM chains; familiarity with non-EVM is desirable
  • Proficiency in Web3 tools: Hardhat, Truffle, Foundry, etc.
  • Experience with front-end technologies (React, Next.js )and backend
  • Good grasp of REST / GraphQL APIs, database work (SQL / NoSQL), and decentralised storage
  • Solid understanding of Web3 security best practices
  • Ability to work in an agile, collaborative team; good communication skills in English

Desirable Extras

  • Experience with gas-efficient contract design and Layer-2 roll-ups
  • Prior exposure to zero-knowledge proofs, account abstraction, or decentralised identity (DID) systems
  • Open source contributions or code samples / portfolio of deployed smart contracts or projects
  • Experience in marketplace / escrow / auction mechanics