Senior Security Engineer, Digital Asset Custody

Job Description

Senior Security Engineer, Digital Asset Custody
On behalf of our Financial Services client, Procom is searching for a Senior Security Engineer, Digital Asset Custody for a 12-month plus role. Role has the possibility to convert to perm in the future. . This position is a hybrid position with 4 days onsite at our client’s Southlake or Austin office. 

Senior Security Engineer, Digital Asset Custody - Job Description:
We are hiring a Senior Security Engineer, Digital Asset Custody to serve as the technical authority for Crypto Custody engineering, with deep ownership of key management, custody security architecture, and risk posture across Schwab's digital asset platforms. This is a hands-on, high-impact individual contributor role. The Lead Engineer sets technical direction, defines custody architecture, and owns critical design decisions across HSMs, MPC, key storage, policy enforcement, disaster recovery, and incident response.

Senior Security Engineer, Digital Asset Custody - Responsibilities:
• Design, implement, and evolve institutional-grade key management architectures, including HSMs and MPC.
• Define clear trade-offs and architectural patterns across hot wallet, warm wallet, and cold storage models.
• Lead the design of the Custody Policy Engine, governing authorization, approvals, limits, and segregation of duties.
• Own custody-specific disaster recovery strategies, including key recovery and quorum loss scenarios.
• Act as the custody architecture authority, ensuring consistency across wallets, blockchains, environments, and platforms.
• Leverage GenAI and agentic AI tools to accelerate architecture design, threat modeling, documentation, testing, and reviews.

Senior Security Engineer, Digital Asset Custody - Mandatory Skills:
• 10+ years of software engineering experience with deep specialization in security-sensitive or cryptographic systems.
• Strong hands-on experience with HSMs, MPC frameworks, and secure key management systems.
• Experience with Web3 security tooling such as Slither, Mythril, and Foundry Fuzzing.
• Experience with common cryptography implementation languages such as C, C++, Rust, or Go.
• Proven ability to design systems where failure has material risk implications.
• Strong grounding in distributed systems, secure architectures, and fault-tolerant design.
• Track record of acting as a technical authority without formal people management.

Senior Security Engineer, Digital Asset Custody – Nice-to-Have Skills:
• Experience with crypto custody, digital asset platforms, or blockchain infrastructure.
• Prior ownership of incident response, DR design, or security runbooks.
• Ability to articulate risk-based trade-offs clearly to technical and non-technical stakeholders.
• Systems thinker who connects technology, security, policy, and operations.
• Experience applying AI tools to complex engineering workflows.

Senior Security Engineer, Digital Asset Custody – Assignment Length:
This is a 12-month contract position.

Senior Security Engineer, Digital Asset Custody - Start Date:
ASAP.

Senior Security Engineer, Digital Asset Custody - Assignment Location:
Southlake, Texas, United States. This is a hybrid position requiring on-site presence 4 days per week. Austin is a backup location.