Citigroup, Inc

Senior Security Engineer - Digital Assets Platform - VP

Citigroup, Inc • $142K — $213K *
New York, NY 10025In-Person
Finance & Insurance
5 - 7 years of experience
Today
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Job Overview by Ladders

Qualifications

  • 7-10 years of software engineering experience focused on application security and cryptography.
  • Strong proficiency in backend Java for building security-critical services.
  • Hands-on experience with Hardware Security Modules (HSMs) integration.
  • Practical knowledge of Multi-Party Computation (MPC) and distributed key management.
  • Expertise in symmetrical and asymmetrical encryption techniques, digital signatures, and secure hashing.
  • Familiarity with secure design principles and patterns.
  • Experience with security threat modeling and CI/CD security tooling.

Responsibilities

  • Design and maintain security-focused Java backend services.
  • Oversee the lifecycle of Hardware Security Modules (HSMs) and integrate them into systems.
  • Implement Multi-Party Computation (MPC) protocols for key management.
  • Enforce cryptographic best practices across digital asset platforms.
  • Define secure design patterns for distributed systems with a zero-trust mindset.
  • Collaborate with cybersecurity teams on threat modeling and risk assessments.
  • Act as a point of expertise for security incidents and vulnerability assessments.

Benefits

  • Medical, dental & vision coverage.
  • 401(k) retirement plan.
  • Life, accident, and disability insurance.
  • Wellness programs.
  • Paid time off including vacation, sick leave, and holidays.
Full Job Description
About the Role

Job Overview

Citi's Integrated Digital Assets Platform (CIDAP) is at the vanguard of institutional blockchain adoption - and security is its foundation. As digital assets move from innovation to regulated infrastructure, the cryptographic integrity of every transaction, wallet, and key lifecycle operation becomes mission-critical. We are building the security layer that the world's most sophisticated financial institution can trust.

We are seeking a Senior Security Engineer (VP) to join our New York-based Digital Assets Platform engineering team. This is a hands-on, Java-focused backend engineering role for a security-minded engineer who understands both the craft of secure software development and the cryptographic primitives that underpin digital asset custody, signing, and key management.

You will sit inside the core engineering team - writing production code every day - while being the resident authority on cryptographic design patterns, HSM integration, MPC protocols, and security architecture. Your work will directly protect billions of dollars of digital asset infrastructure used by institutional clients worldwide.

Key Responsibilities
  • Design, develop, and maintain security-critical backend services in Java - including cryptographic libraries, key management APIs, signing workflows, and secure transaction pipelines - within Citi's Digital Assets Platform.
  • Own the integration and operational lifecycle of Hardware Security Modules (HSMs) - including vendor evaluation, API integration (PKCS#11, JCE), key generation, rotation, and policy enforcement.
  • Architect and implement Multi-Party Computation (MPC) protocols and threshold signature schemes (TSS) for distributed key management and institutional-grade wallet signing operations.
  • Apply and enforce cryptographic best practices across the platform - including symmetric and asymmetric encryption (AES-GCM, RSA, ECC), digital signatures (ECDSA, EdDSA), hashing, and key derivation (HKDF, PBKDF2).
  • Define and implement secure design patterns for distributed systems - including zero-trust architecture, secrets management, mutual TLS, certificate lifecycle management, and secure enclave usage.
  • Collaborate with Citi's Cybersecurity, Risk, and Architecture teams to conduct threat modelling, security design reviews, and cryptographic risk assessments for new platform capabilities.
  • Champion security-by-design across the engineering team - conducting code reviews with a security lens, embedding SAST/DAST tooling into CI/CD pipelines, and raising the security posture of every service shipped.
  • Engage with external HSM vendors, MPC protocol libraries, and standards bodies to stay ahead of the cryptographic landscape and inform Citi's technology roadmap.
  • Act as a technical escalation point for security incidents, vulnerability triage, and cryptographic design decisions across the Digital Assets Platform.


Qualifications Required
  • 7-10 years of experience in software engineering with a significant focus on application security, cryptography, or secure systems design
  • Strong, production-level proficiency in backend Java - including experience building security-critical, enterprise-grade services
  • Hands-on experience integrating Hardware Security Modules (HSMs) via PKCS#11, JCE/JCA, or vendor-specific APIs
  • Practical understanding of Multi-Party Computation (MPC) protocols, threshold signature schemes (TSS), or distributed key management architectures
  • Deep knowledge of applied cryptography - symmetric/asymmetric encryption, digital signatures, key exchange protocols, certificate management (PKI/X.509), and secure hashing
  • Familiarity with secure design patterns - zero-trust, least-privilege, secrets management, mTLS, and secure enclave technologies
  • Experience with threat modelling frameworks (STRIDE, PASTA, or equivalent) and security design review processes
  • Understanding of CI/CD security tooling - SAST, DAST, dependency scanning, secrets scanning
  • Strong command of distributed systems fundamentals - microservices, API security (OAuth 2.0, JWT), and secure inter-service communication patterns


Advantageous
  • Experience in digital asset custody, blockchain key management, or institutional crypto infrastructure
  • Familiarity with smart contract security patterns and on-chain transaction signing workflows
  • Knowledge of financial services regulatory frameworks relating to cryptographic controls (NIST SP 800-57, FIPS 140-2/3, PCI-DSS)
  • Exposure to MPC libraries such as MPC-CMP, tss-lib, or equivalent open-source frameworks
  • Background in penetration testing, red team exercises, or formal security certifications (CISSP, CSSP, CEH, OSCP)

Education
  • Bachelor's degree in Computer Science, Computer Engineering, Cybersecurity, or a related technical discipline - required
  • Master's or PhD in Cryptography, Information Security, or Computer Science - a strong advantage


Job Family Group:
Technology

Job Family:
Applications Development

Time Type:
Full time

Primary Location:
New York New York United States

Primary Location Full Time Salary Range:
$142,320.00 - $213,480.00

In addition to salary, Citi's offerings may also include, for eligible employees, discretionary and formulaic incentive and retention awards. Citi offers competitive employee benefits, including: medical, dental & vision coverage; 401(k); life, accident, and disability insurance; and wellness programs. Citi also offers paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays. For additional information regarding Citi employee benefits, please visit citibenefits.com. Available offerings may vary by jurisdiction, job level, and date of hire.

Most Relevant Skills
Please see the requirements listed above.

Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.

Anticipated Posting Close Date:
Aug 18, 2026

About Citigroup, Inc

Citigroup is a financial services holding company that provides financial products and services. The company operates through two segments, Global Consumer Banking (GCB) and Institutional Clients Group (ICG). The GCB segment offers traditional banking services to retail customers through retail banking, commercial banking, Citi-branded cards, and Citi retail services. The ICG segment offers various banking, and financial products and services to corporate, institutional, public sector, and high-net-worth clients. This segment provides wholesale banking products and services, including fixed-income and equity sales and trading, foreign exchange, prime brokerage, derivative services, equity and fixed-income research, corporate lending, investment banking, and advisory services, private banking, cash management, trade finance, and securities services. Citi is committed to sustainability and social responsibility, and the company invests in initiatives that promote economic progress.

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Learn more about Citigroup, Inc
Market Cap
$1.3 billion
Industry
Finance & Insurance
Net Income
$89.6 million
Founded
1812
5 Year Trend
+4.6%
NASDAQ
C
* Ladders Estimates

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