Feldspar & Flint LLC is hiring a

Senior Blockchain Engineer - $180k

Feldspar & Flint is a NYC metro-based Recruiting firm dedicated to identifying and providing exceptional candidates to meet the specific needs of our clients.

Job Summary:

We are seeking a highly skilled and experienced Senior Blockchain Engineer with a strong background in Solidity development and Quantitative Finance. The ideal candidate will possess deep expertise in financial instruments such as derivatives, swaps, lending, repo markets, collateral management, and liquidation, along with a solid understanding of blockchain technology and smart contract development.

You will play a key role in designing, developing, and deploying secure and scalable smart contracts that power next-generation DeFi infrastructure.

Key Responsibilities:

• Design, develop, test, and deploy smart contracts using Solidity for complex QuantFi use cases.
• Collaborate with product and finance teams to translate financial models into blockchain-based solutions.
• Conduct rigorous security testing using tools like Slither and Mythril to ensure contract integrity.
• Utilize frameworks such as Hardhat and Foundry for development and testing.
• Write scripts and automation tools using JavaScript or TypeScript.
• Participate in code reviews, audits, and continuous improvement of smart contract architecture.
• Stay current with DeFi trends, security best practices, and emerging technologies.

Must-Have Qualifications:

• Bachelor’s degree in Computer Science, Engineering, Finance, or a related STEM field.
• Proven experience in Quantitative Finance, including derivatives, lending, and collateral systems.
• Strong proficiency in Solidity and smart contract development.
• Experience with Solidity security testing tools (e.g., Slither, Mythril).
• Hands-on experience with Hardhat and/or Foundry.
• Proficiency in scripting languages such as JavaScript or TypeScript.

Nice-to-Have Qualifications:

• Experience building or contributing to DeFi infrastructure, especially in areas like derivatives, collateral, lending, risk management, or compliance.
• Familiarity with on-chain risk modeling and oracle integration.
• Contributions to open-source blockchain projects.

Apply Now: