Senior Crypto Custody Architect & Security Engineer

Paradigm Global Consulting; Southlake (TX); On-site; USD 180,000 - 240,000; Full time

Job summary

Charles Schwab seeks a Senior Security Engineer, Digital Asset Custody to act as the technical authority for crypto custody engineering. You will own key management, custody security architecture, and risk posture across Schwab's digital asset platforms.

This is a hands-on, high-impact individual contributor role requiring autonomy and the ability to influence security, engineering, operations, and leadership.

Qualifications

• 10+ years of software engineering experience 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, Foundry Fuzzing.
• Experience with languages like C, C++, Rust, Go.
• Experience collaborating with security auditors (Trail of Bits, Halborn).
• Proven ability to design systems with high risk implications.
• Strong grounding in distributed systems and fault-tolerant design.
• Track record as a technical authority without formal people management.

Responsibilities

• Design, implement, and evolve institutional-grade key management architectures (HSMs, key generation, rotation, storage, signing, recovery).
• Define custody architecture and policy enforcement to support hot/warm/cold storage models.
• Lead the Custody Policy Engine design (authorization, approvals, limits, separation of duties, auditability).
• Engineer disaster recovery, incident response runbooks, and resilience plans for custody systems.
• Ensure security, resilience, and auditable custody architectures across assets and blockchains.
• Leverage AI tools to accelerate architecture design, threat modeling, and reviews.

Skills

Security engineering

Cryptographic systems

HSMs

MPC frameworks

Web3 security tooling

C/C++/Rust/Go

Security audits collaboration

Distributed systems

Incident response

AI in engineering

Tools

Slither

Mythril

Foundry Fuzzing

Job description

Charles Schwab seeks a Senior Security Engineer, Digital Asset Custody to act as the technical authority for crypto custody engineering. You will own key management, custody security architecture, and risk posture across Schwab's digital asset platforms.

This is a hands-on, high-impact individual contributor role requiring autonomy and the ability to influence security, engineering, operations, and leadership.