Senior Security Engineer, Digital Assets

Role Summary

Design build and secure institutional-grade digital asset custody platforms. The posting frames this as a hands-on engineering role focused on crypto-native security capabilities and digital asset development including secure wallet technologies key management cryptographic protocols smart contract security tokenization custody policy enforcement and advanced blockchain security solutions.

Key Responsibilities

• Contribute to the design and implementation of secure wallet solutions spanning MPC HSMs cold warm and hot wallet architectures and custodial versus non-custodial control models.
• Implement distributed key generation and signing workflows and ensure secure handling of key lifecycle events such as generation storage usage rotation and recovery.
• Design and implement security-critical components using modern cryptographic protocols DeFi application security principles and cross-chain and blockchain interoperability patterns.
• Evaluate and integrate advanced technologies such as zero-knowledge proofs decentralized identity frameworks and applicable CBDC architectures.
• Build and configure programmable custody policy engines with multi-approval workflows spending thresholds velocity limits role-based access controls and segregation of duties.
• Work with engineering cybersecurity risk compliance and audit stakeholders on security reviews threat modeling architecture assessments and incident analysis and remediation.
• Assess blockchain architectures smart-contract frameworks tokenization approaches and secure bridge or interoperability models for enterprise suitability.
• Leverage GenAI and agentic AI tools to accelerate threat modeling cryptographic design reviews documentation and validation.

Source-Supported Qualification Themes

• 7 years of software engineering experience with a strong focus on security or cryptography.
• Hands-on experience with secure wallet technologies and key management systems such as MPC HSMs or equivalent.
• Strong understanding of cryptographic primitives secure protocol design and distributed systems.
• Experience building systems where security failures have material impact.
• Ability to collaborate effectively across engineering security and risk teams.
• Strongly preferred: experience with crypto custody platforms digital assets or blockchain infrastructure; hands-on work with ZKPs DID frameworks DeFi protocols or CBDC-related systems; and experience implementing policy-driven transaction controls in high-risk systems.