Digital Assets Custody Engineer

Project description We are seeking a highly experienced Digital Assets Custody Engineer to design, build, and operate secure custody solutions for digital assets across hot, warm, and cold environments. This role plays a critical part in safeguarding cryptographic keys, ensuring transaction integrity, and maintaining highly available, compliant, and scalable custody platforms. You should have combined deep expertise in blockchain technologies, cryptographic key management, and secure system architecture with a strong understanding of operational controls, regulatory requirements, and security best practices. You will collaborate closely with security, compliance, and DevOps teams to ensure the highest standards of asset protection and operational resilience. Responsibilities Design, implement, and maintain secure digital asset custody architectures, including hot, warm, and cold storage solutions Develop and operate Key Management Systems (KMS) supporting multi-signature and Multi-Party Computation (MPC) wallets Build, integrate, and maintain blockchain connectivity for networks such as Bitcoin, Ethereum, and other Layer 1 / Layer 2 protocols Implement best-in-class security controls for private key generation, storage, backup, access, and transaction signing Define and enforce transaction approval workflows, policy controls, and cryptographic signing processes Continuously monitor custody systems for anomalies, unauthorized activity, and potential security threats Partner with security, compliance, and DevOps teams to ensure regulatory, audit, and operational alignment Conduct and support security audits, penetration tests, and risk assessments related to custody infrastructure Architect for high availability, scalability, disaster recovery, and business continuity Automate custody-related operations including wallet creation, transaction processing, reconciliation, and reporting Contribute to incident response planning, post-mortem analysis, and ongoing platform hardening Skills Must have 6+ years of professional experience in software engineering, security engineering, or infrastructure engineering 3+ years of hands-on experience working with blockchain systems, cryptographic assets, or digital asset custody platforms Proven experience designing or operating secure key management solutions (HSMs, MPC, multi-signature wallets) Strong understanding of public-key cryptography, key lifecycle management, and secure signing mechanisms Experience with Bitcoin, Ethereum, and at least one other blockchain or smart contract platform Solid knowledge of blockchain transaction models, nonce management, fee mechanics, and consensus behaviors Experience integrating custody systems with APIs, internal services, and operational tooling Familiarity with cloud infrastructure, containerized environments, and infrastructure-as-code Proficiency in at least one systems or backend programming language (e.g., Go, Rust, Java, Python, or similar) Strong understanding of security best practices for sensitive systems (least privilege, defense in depth, secure enclaves) Experience supporting audits, regulatory reviews, and compliance frameworks (e.g., SOC 2, ISO 27001, internal controls) Knowledge of monitoring, alerting, incident response, and threat detection methodologies Experience building highly available and fault-tolerant systems with disaster recovery strategies Strong problem-solving mindset with attention to detail in high-risk environments Ability to work cross-functionally with security, compliance, product, and DevOps teams Excellent written and verbal communication skills Nice to have N/A Other Languages English: C1 Advanced Seniority Senior