Steadfast International Services, LLC is hiring a
Blockchain Lead

Compensation: $120k - $150k

Location: NJ Jersey City US

Job Title: Associate Director, Blockchain Engineering

Location: Jersey City, NJ / Tampa, FL (Hybrid: 3 days onsite – Tuesdays, Wednesdays, plus 1 flex day)

Type: Full-Time | Mid-Senior Level

Function: Information Technology

Industry: Financial Services

Overview:

We are seeking a seasoned Solidity Engineer with strong expertise in Quantitative Finance to join our blockchain engineering team. The ideal candidate should possess a deep understanding of financial instruments—such as derivatives, swaps, lending, repo markets, and collateral management—and a strong background in blockchain development and smart contract implementation.

Key Responsibilities:

  • Design, develop, test, and deploy smart contracts for quantitative finance (QuantFi) applications.
  • Model and implement complex financial instruments and systems.
  • Collaborate with frontend/backend teams to integrate smart contracts into web platforms.
  • Build cross-chain interoperability and work with various Layer 1 technologies.
  • Conduct thorough code reviews ensuring security, performance, and quality.
  • Maintain and enhance deployed smart contracts as business needs evolve.
  • Stay up to date with blockchain and cryptographic innovations to identify and mitigate security risks.
  • Work with product managers and stakeholders to define technical requirements and system architecture.
  • Communicate blockchain concepts to both technical and non-technical team members.
  • Debug and resolve issues with deployed smart contracts.

Required Qualifications:

  • Bachelor’s degree in Computer Science, Engineering, Finance, or related STEM field.
  • 7+ years of software development experience.
  • Proven experience in Solidity development and Quantitative Finance.
  • Background in finance, banking, or trading with understanding of financial systems and instruments.
  • Strong knowledge of blockchain security principles and smart contract vulnerabilities.
  • Proficiency with Hardhat, Foundry, and Solidity security tools (e.g., Slither, Mythril).
  • Strong scripting skills in JavaScript or TypeScript.
  • Experience with unit/integration testing and best development practices.

Preferred Qualifications:

  • Advanced degree in Computer Science, Engineering, Finance, or a related field.
  • Hands-on experience in DeFi infrastructure, including derivatives, lending, collateral, and risk systems.

Interview Process:

  1. Initial Screening: HireVue
  2. Technical Interview: Zoom with Hiring Manager
  3. Final Round: Onsite Interview

Benefits Include:

  • Performance-based bonus
  • Health and life insurance
  • Retirement plans
  • Generous leave policy including personal/family care

Apply Now:

Compensation: $120k - $150k

Location: NJ Jersey City US


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