Senior Security Engineer, Digital Assets

Purple Drive Technologies LLC
Austin, United States of America
15 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English
Experience level
Senior
Compensation
$ 160K

Job location

Austin, United States of America

Tech stack

Communications Protocols
DevOps
Digital Assets
Distributed Systems
Cryptographic Protocols
Key Management
Blockchain
Software Engineering
Software Security
Blockchain

Job description

  • 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.
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Requirements

  • 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.

Benefits & conditions

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