Lead Engineer, Custody Engineering; Tokenization

Bullish is an institutionally focused global digital asset platform that provides market infrastructure and information services. These include:
Bullish
Exchange – a regulated and institutionally focused digital assets spot and derivatives exchange, integrating a high-performance central limit order book matching engine with automated market making to provide deep and predictable liquidity. Bullish Exchange is regulated in Germany, Hong Kong, and Gibraltar.
Coin Desk
Indices – a collection of tradable proprietary and single-asset benchmarks and indices that track the performance of digital assets for global institutions in the digital assets and traditional finance industries.
Coin Desk
Data - a broad suite of digital assets market data and analytics, providing real-time insights into prices, trends, and market dynamics.
Coin Desk
Insights – a digital asset media and events provider and operator of , a digital media platform that covers news and insights about digital assets, the underlying markets, policy, and blockchain technology.

At Bullish, we are engineering the institutional standard for the digital asset industry. Our mission is to build a platform centered on security and compliance, requiring a commitment to technical excellence that extends beyond delivering code. As a global organization, we set a high bar for those driven to do their best work alongside experienced, deeply specialized peers.

Engineers here treat development as a craft and own the outcome from concept to deployment. Our teams bring structure to ambiguity and shape the frameworks that support a global organization. We refuse to compromise on quality and seek problem solvers who thrive on complex technical challenges with real market consequences.

The Custody Engineering team builds the systems that safeguard user assets, architecting secure and compliant infrastructure for the full lifecycle of funds. Our technical scope spans blockchain development, smart contracts, oracles, and the full-stack systems that power them. We operate with a high degree of autonomy and ownership over core infrastructure, connecting blockchain technology with institutional-grade stability.

With the core architecture in place, the team is now heavily focused advancing the tokenization strategy. As Lead, you will own the technical roadmap, evolve the foundational architecture using proven standards to keep security risk low, and guide the team as the systems scale. The work ships features whose impact is visible to the business directly.

• Drive the evolution of the foundational architecture and engineering roadmap, leading the project's scaling and tokenization phases using established industry standards.
• Serve as the technical owner for the full tokenization lifecycle, including asset issuance, controlled transfer, settlement mechanics, and on‑chain verification.
• Lead the secure design, implementation, and audit of the smart contracts that hold customer assets, and the backend for workflows interacting with the smart contracts.
• Define and enforce auditable security controls (e.g., policy engines, governance rules) that meet institutional standards for asset safety and regulatory compliance.
• Act as the primary cross‑functional technical interface, translating cryptographic and security requirements into actionable engineering work for engineering, product, and operational compliance teams.
• Mentor a team of engineers and set the standard for code quality, security review, and engineering judgment.

• 6+ years of experience architecting and scaling production‑grade systems. Proven ability to lead cross‑functional technical initiatives and mentor high‑performing engineering teams to deliver high‑impact solutions.
• Expert‑level fluency in secure public chain smart contract development, such as Solidity and the Ethereum Virtual Machine (EVM), with command of industry‑standard security frameworks and libraries such as Open Zeppelin.
• Deep, authoritative knowledge of token standards (e.g. ERC‑20, ERC‑3643, Token‑2022) and advanced wallet and custody architectures (e.g., ERC‑4337 Account…