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# Senior Security Engineer, Digital Assets

- **Company:** Purple Drive Technologies LLC
- **Location:** Austin, TX, United States
- **Experience:** Expert
- **Salary:** $145,600.0 - $160,160.0
- **Contract:** Permanent contract
- **Skills:** Communications Protocols, DevOps, Digital Assets, Distributed Systems, Cryptographic Protocols, Key Management, Blockchain, Software Engineering, Software Security, Blockchain Interoperability
- **Published:** July 3, 2026
- **Apply:** https://www.careerjet.com/jobad/usfef555eb98261c42b9fda61199ad446f

## About the Role

* 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.

## 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.
 * Leverage GenAI and agentic AI tools to accelerate threat modeling, cryptographic design reviews, documentation, and validation., In this role, you will leverage your expertise to help train next-generation AI systems, shaping how models learn, reason, and perform through high-quality, real-world input. Your …
 + 1 month ago, As a Senior DevOps Engineer, you will play a pivotal role in shaping the future of AI systems by designing and maintaining scalable infrastructure solutions. Your expertise will di…
 + 1 month ago
+


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