Senior Security Engineer, Digital Asset Custody

Job Title: Senior Security Engineer, Digital Asset Custody

Duration (Contract): 12 Months

Client Location: Southlake, TX

Location Preference: Onsite

Job Description:
As a Senior Security Engineer specializing in Digital Asset Custody, you will act as the technical authority responsible for designing and securing enterprise-grade custody platforms for digital assets. You will lead the architecture and implementation of secure key management systems, policy enforcement mechanisms, and resilient custody workflows while ensuring compliance with strict security and regulatory requirements. This role demands deep expertise in cryptographic systems, distributed architectures, and risk management, along with the ability to influence technical direction and ensure the highest standards of security, scalability, and operational resilience.

Key Responsibilities:

• Design and implement secure key management systems using HSMs, MPC, and advanced cryptographic techniques
• Architect and manage secure processes for key generation, storage, rotation, signing, and recovery
• Define and implement custody models including hot, warm, and cold wallet strategies
• Lead the design and development of custody policy engines governing transaction approvals and controls
• Translate regulatory, legal, and risk requirements into enforceable technical controls
• Develop and maintain disaster recovery strategies for custody systems, including key recovery and failure scenarios
• Create and manage incident response runbooks and lead post-incident analysis and remediation
• Ensure high availability, scalability, and resilience across custody platforms and blockchain integrations
• Identify and mitigate risks across custody architecture, workflows, and operational processes
• Collaborate with cross-functional teams to strengthen security posture and technical standards
• Develop monitoring, auditing, and observability solutions to ensure transparency and traceability
• Leverage AI-assisted tools to enhance system design, threat modeling, and engineering efficiency

Required Skills, Experiences, Education, and Competencies:

• 10+ years of software engineering experience with a focus on security or cryptographic systems
• Strong hands-on experience with Hardware Security Modules (HSMs) and Multi-Party Computation (MPC)
• Deep understanding of secure key management architectures and cryptographic principles
• Experience with Web3 security tools and smart contract security analysis
• Proficiency in programming languages such as C, C++, Rust, or Go for secure system development
• Experience designing and supporting highly secure, fault-tolerant distributed systems
• Proven ability to lead architectural decisions in high-risk, high-trust environments
• Strong understanding of security frameworks, zero trust principles, and risk management strategies
• Experience collaborating with security auditors and third-party security assessments
• Excellent problem-solving, analytical, and communication skills
• Ability to influence technical decisions and guide cross-functional teams
• Experience with digital asset custody platforms or blockchain infrastructure (preferred)
• Experience owning incident response and disaster recovery strategies (preferred)
• Ability to articulate complex risk trade-offs to technical and non-technical stakeholders (preferred)
• Experience leveraging AI tools for engineering, security analysis, and automation (preferred)

The hourly range for roles of this nature are $70.00 to $90.00/hr. Rates are heavily dependent on skills, experience, location, and industry.

cyberThink is an Equal Opportunity Employer.