Senior Engineer, Custody Engineering (Tokenization)

Responsibilities

• Drive tokenization features from concept through deployment, scaling digital asset architecture against industry standards.
• Own technical execution for the digital asset lifecycle, including issuance, controlled transfer, and on-chain verification.
• Lead the design, implementation, and testing of smart contracts that hold customer assets and coordinate the end-to-end audit process.
• Build and maintain the off-chain integration layer to ensure secure, reliable communication between the blockchain and internal systems.
• Partner with product and operational compliance teams to translate cryptographic and security requirements into engineering solutions.

Requirements

• 5+ years of software engineering experience delivering complex systems in production.
• Expert-level fluency in Solidity and the Ethereum Virtual Machine (EVM).
• Strong command of TypeScript for backend development, API integration, and off-chain indexing services.
• Hands-on experience with modern Web3 development tooling such as Foundry or Hardhat.
• Expert-level knowledge of smart contract token standards and the surrounding ecosystem.
• A security-first mindset with proven expertise in preventing and mitigating common smart contract vulnerabilities.
• Degree in Computer Science, Engineering, or a related technical field.

Preferred Qualifications

• Engineering experience within the finance or high-security sectors.
• Familiarity with SVM/Solana or Daml/Canton smart contract development.
• Familiarity with C++ to interface with broader platform systems.
• Fluency in modern key management paradigms such as MPC or HSM.
• Experience with advanced wallet architectures like Account Abstraction (ERC-4337) or multi-signature frameworks.

About the Company

Bullish is an institutionally focused global digital asset platform providing market infrastructure and information services. Through its ecosystem, including the Bullish Exchange, CoinDesk Indices, CoinDesk Data, and CoinDesk Insights, the company provides deep liquidity, real-time market analytics, and industry-leading digital asset media.