Senior Blockchain Engineer: Smart Contracts & Quant Models

Unchain Data; Boston (MA); Hybrid; USD 140,000 - 285,000; Full time

Benefits offered by this job

Health insurance

Market-leading retirement

Generous PTO and parental leave

Employee match program for charity

Job summary

Fidelity Digital Asset Management is seeking a senior blockchain engineer to architect and deploy advanced blockchain solutions and smart contracts across multiple platforms in a hybrid work setting in Boston.

You will collaborate with quantitative researchers to integrate blockchain data into predictive models and trading systems, while mentoring engineers in a fast-paced, high-performance environment. The role emphasizes security, scalability, and innovation.

Qualifications

• 4+ years of hands-on blockchain engineering or crypto infrastructure experience.
• Strong understanding of EVM tokens (ERC-20, ERC-721) and DeFi primitives.
• Proficiency in Python, Solidity, and JavaScript/TypeScript.

Responsibilities

• Architect and oversee blockchain-based systems across EVM, Solana, and Cosmos SDK.
• Lead secure deployment pipelines, testing, and audit processes for crypto infra.
• Collaborate with quant researchers to embed blockchain data into models and trading algorithms.
• Review and audit smart contracts for security, scalability, and DeFi standards.

Skills

Blockchain engineering

Smart contract development

Python

JavaScript/TypeScript

Solidity

DeFi protocols

Tools

Hardhat

Truffle

OpenZeppelin

Mythril

Ganache

Job description

Fidelity Digital Asset Management is seeking a senior blockchain engineer to architect and deploy advanced blockchain solutions and smart contracts across multiple platforms in a hybrid work setting in Boston.

You will collaborate with quantitative researchers to integrate blockchain data into predictive models and trading systems, while mentoring engineers in a fast-paced, high-performance environment. The role emphasizes security, scalability, and innovation.