Job#: 3037301

Job Description:

Senior Security Engineer – Digital Asset Custody

Position Overview

We are seeking a highly experienced Senior Security Engineer, Digital Asset Custody to serve as a technical authority for secure custody platforms supporting digital assets. This is a hands-on, high-impact individual contributor role responsible for designing and owning key management systems, custody architecture, and enterprise security controls.

You will play a critical role in shaping the security and risk posture of digital asset platforms, working closely with engineering, cybersecurity, risk, and leadership teams to deliver secure, resilient, and scalable custody solutions.

Why Join Us

This role offers the opportunity to build the foundational security layer for digital asset custody platforms, working at the intersection of cryptography, blockchain, and enterprise security in a high-impact environment.

Key Responsibilities

Key Management & Cryptographic Architecture

• Design and implement institutional-grade key management systems, including:
  • Hardware Security Modules (HSMs)
  • Multi-Party Computation (MPC)
  • Secure key generation, storage, rotation, signing, and recovery
• Define and evaluate architectures across hot, warm, and cold wallet models
• Ensure compliance with security, regulatory, and audit requirements
• Partner with cybersecurity and risk teams to embed zero-trust and defense-in-depth principles

Custody Policy & Governance

• Lead the design and development of a Custody Policy Engine to govern:
  • Transaction authorization and approvals
  • Role-based access and segregation of duties
  • Transaction limits, controls, and exception handling
  • Policy versioning, auditability, and enforcement
• Translate business, legal, and risk requirements into technical controls and automation
• Serve as a trusted advisor on custody governance and policy design

Disaster Recovery & Incident Response

• Own custody-specific disaster recovery strategies, including:
  • Key recovery and quorum loss scenarios
  • Chain-related failure events
• Develop and maintain incident response plans and recovery runbooks
• Partner with Operations, Security, and SRE teams to ensure readiness and resilience
• Lead post-incident reviews, root cause analysis, and long-term remediation planning

Custody Architecture & Risk Management

• Serve as the technical authority for custody architecture, ensuring consistency across wallets, blockchains, and environments
• Identify risks early and define clear mitigation strategies and trade-offs
• Ensure systems scale securely across multiple assets, chains, and tokenized products
• Drive enterprise-wide improvements in security, resilience, and engineering rigor

Engineering Excellence & AI Utilization

• Apply modern engineering practices to build secure, scalable, and observable systems
• Leverage GenAI and agentic AI tools to enhance:
  • Threat modeling and architecture design
  • Code development, testing, and validation
  • Documentation and knowledge sharing
• Promote high standards for AI-assisted engineering with a focus on accuracy and safety

Required Qualifications

• 10+ years of software engineering experience, with focus on security, cryptography, or high-risk systems
• Hands-on experience with:
  • HSMs, MPC frameworks, and secure key management systems
• Experience with Web3 security tools (e.g., Slither, Mythril, Foundry Fuzzing)
• Proficiency in low-level or systems programming languages such as C, C++, Rust, or Go
• Strong understanding of distributed systems, secure architectures, and fault-tolerant design
• Experience collaborating with security auditors (e.g., Trail of Bits, Halborn)
• Proven ability to operate as a technical leader and decision-maker without direct reports

Preferred Qualifications

• Experience with crypto custody platforms, blockchain systems, or digital asset infrastructure
• Ownership of incident response, disaster recovery, or security runbooks
• Ability to communicate risk-based decisions to technical and non-technical audiences
• Strong systems-thinking mindset across technology, security, governance, and operations
• Experience leveraging AI tools in engineering workflows

What Success Looks Like

• Secure, resilient, and fully auditable key management and custody systems
• Well-defined and tested failure modes and recovery strategies
• Fast, effective response to incidents with clear accountability
• Scalable custody architecture supporting multiple assets and blockchain networks
• Recognition as a key technical authority driving digital asset custody strategy

EEO Employer

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Employee Services Department at [email protected] or 844-463-6178.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico.

Everforth Apex uses a virtual recruiter as part of the application process. Click here for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at https://www.apexsystems.com/privacy-policy

Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Everforth Apex team member can provide.

Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.

If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.

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