DLT Security Architect

Citi • Tampa, FL

2d

About The Position

Citi, the leading global bank, has approximately 200 million customer accounts and does business in more than 160 countries and jurisdictions. Citi provides consumers, corporations, governments, and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, securities brokerage, transaction services, and wealth management.
As a bank with a brain and a soul, Citi creates economic value that is systemically responsible and in our clients’ best interests. As a financial institution that touches every region of the world and every sector that shapes your daily life, our Enterprise Operations & Technology teams are charged with a mission that rivals any large tech company. Our technology solutions are the foundations of everything we do from keeping the bank safe, managing global resources, and providing the technical tools our workers need to be successful to designing our digital architecture and ensuring our platforms provide a first-class customer experience. We reimagine client and partner experiences to deliver excellence through secure, reliable, and efficient services.
Our commitment to diversity includes a workforce that represents the clients we serve from all walks of life, backgrounds, and origins. We foster an environment where the best people want to work. We value and demand respect for others, promote individuals based on merit, and ensure opportunities for personal development are widely available to all. Ideal candidates are innovators with well-rounded backgrounds who bring their authentic selves to work and complement our culture of delivering results with pride. If you are a problem solver who seeks passion in your work, come join us. We’ll enable growth and progress together.
Job Description – DLT Security Architect
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.

Requirements

• 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
• Experience in large, regulated enterprise environments (financial services preferred)
• Familiarity with security‑by‑design and threat‑modeling methodologies
• Strong written and verbal communication skills
• Proven ability to influence outcomes through technical credibility and collaboration

Nice To Haves

• 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)

Responsibilities

• 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
• 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
• 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
• 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
• 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

Benefits

• medical, dental & vision coverage
• 401(k)
• life, accident, and disability insurance
• wellness programs
• paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed
• Number of Employees: 5,001-10,000 employees