Web3 Brand & Community Lead

CoinCortex Finance; United States; Hybrid; USD 120,000 - 160,000; Full time

Job summary

CoinCortex Finance is seeking a Blockchain Engineer to design, implement, and review smart contracts and protocol integrations that run in production for institutional clients.

You will work in Solidity and adjacent Web3 tooling with a security-first mindset, optimizing gas and upgrade paths while collaborating with product, security, and backend teams to align on-chain behavior with financial controls.

Qualifications

• 3+ years building smart contracts in Solidity or comparable languages.
• Production experience with Ethereum, EVM chains, and Web3 tooling.
• Strong grasp of security, gas optimization, and protocol design.
• Familiarity with testing frameworks, audits, and secure deployment practices.
• Ability to collaborate with product and backend teams on production releases.

Responsibilities

• Design, implement, and maintain smart contracts and protocol integrations
• Review code for security, correctness, gas efficiency, and upgrade safety
• Integrate Ethereum and EVM-chain infrastructure with CoinCortex services
• Write tests, deployment procedures, and operational documentation
• Support incident response and on-chain monitoring for production systems

Skills

Solidity

Ethereum experience

Web3 tooling

Security & gas optimization

Collaborative release process

Job description

CoinCortex Finance depends on reliable on-chain systems for routing, settlement, and treasury operations. As Blockchain Engineer, you will design, implement, and review smart contracts and protocol integrations that run in production for institutional clients.

You will work in Solidity and adjacent Web3 tooling, with a security-first approach to gas, upgrade paths, and failure modes. You will partner with product, security, and backend engineering so on-chain behavior matches the financial controls clients expect.

• Type: Full-time
• Location: Remote / Hybrid
• Salary range: $120,000 – $160,000

What you will do

• Design, implement, and maintain smart contracts and protocol integrations
• Review code for security, correctness, gas efficiency, and upgrade safety
• Integrate Ethereum and EVM-chain infrastructure with CoinCortex services
• Write tests, deployment procedures, and operational documentation
• Support incident response and on-chain monitoring for production systems

Requirements

• 3+ years building smart contracts in Solidity or comparable languages
• Production experience with Ethereum, EVM chains, and Web3 tooling
• Strong grasp of security, gas optimization, and protocol design
• Familiarity with testing frameworks, audits, and secure deployment practices
• Ability to collaborate with product and backend teams on production releases