About
The DLT Security Architect is a senior technical specialist responsible for providing security architecture, risk oversight, and design assurance for Distributed Ledger Technology (DLT) and digital asset initiatives across Citi. The role ensures DLT platforms, smart contracts, and supporting infrastructure are designed and operated securely, at scale, and in alignment with Citi's regulatory and risk requirements. Working closely with the DLT Center of Excellence (CoE), Cyber Architecture, Engineering, Risk, and Compliance teams, the architect advises on secure adoption of blockchain technologies, including Citi's Digital Asset Platform (CDAP), and contributes to the DLT Security Standard governing blockchain use across the firm. This is a hands-on advisory and subject-matter expert role, influencing outcomes through technical authority rather than delivery ownership, and ensuring DLT initiatives meet the standards expected of a globally systemically important financial institution. Key Responsibilities
DLT Security Architecture & Design Provide architecture guidance and design assurance for DLT platforms, nodes, smart contracts, wallets, and related services Review DLT solutions for alignment with Citi architecture standards, SDLC, and security controls Develop DLT reference architectures, patterns, and best practices Evaluate third-party DLT platforms and vendors against Citi security requirements Security & Risk Architecture Apply security-by-design principles covering identity, key management, transaction signing, node security, and network architecture Perform DLT-specific threat modeling (e.g., smart contracts, consensus, oracles, external connectivity) Partner with Security and Risk teams to ensure solutions operate within approved risk appetite Maintain blockchain-specific security assessments and control frameworks Smart Contracts & SDLC Integration Advise on secure smart contract development, deployment, upgrades, and decommissioning Define security gates and review checkpoints within deployment pipelines Improve tooling, automation, and assurance for smart contract security Governance & DLT CoE Support Act as technical SME for the DLT CoE and related governance forums Translate governance decisions into actionable security and architecture requirements Contribute to and maintain the DLT Security Standard Collaboration & Advisory Partner with engineering and application teams to guide secure DLT implementations Communicate complex DLT risks and mitigations to technical and non-technical stakeholders Support training and knowledge uplift on DLT and digital asset security Present security architecture recommendations to senior leadership Required Qualifications
Technical & Security Expertise 10+ years in technology architecture, cybersecurity, or distributed systems Hands-on experience with DLT/blockchain or cryptographic systems Strong knowledge of cryptographic key management (HSM, MPC, signing models) Understanding of smart contract architectures and security risks Experience integrating security into enterprise SDLCs Domain & Risk Knowledge Experience in large, regulated enterprise environments (financial services preferred) Familiarity with security-by-design and threat-modeling methodologies Communication & Influence Strong written and verbal communication skills Proven ability to influence outcomes through technical credibility and collaboration Preferred Qualifications
Experience with digital assets, custody platforms, or tokenisation Hands-on exposure to enterprise DLT platforms (e.g., Hyperledger, Corda, Ethereum/EVM) Knowledge of consensus mechanisms, DeFi risks, or zero-knowledge proofs Experience with security reviews, audits, or regulatory-adjacent engagements Relevant certifications (CISSP, TOGAF, blockchain or cloud certifications) Why This Role Matters
This role enables Citi's secure adoption of DLT and digital assets by: Protecting high-value digital asset platforms and smart contracts Enabling safe innovation within a regulated, tier-1 financial institution Shaping firm-wide DLT security standards as initiatives move from pilot to production Working Environment: High autonomy, specialist depth, emerging technology focus, and direct exposure to senior leadership with measurable impact on real financial platforms.
Languages
- English
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