Senior Application Security Engineer (Java), VP
About The Position
Citi’s Technology Infrastructure team is seeking a Senior Application Security Engineer to own the end-to-end engineering lifecycle, maintenance, evaluation, and rollout of critical authentication and information security platforms. The role combines Java development, infrastructure automation using Shell scripting and SQL, and expertise in multifactor authentication mechanisms such as MFA/2FA, OTP, Challenge/Response, and RADIUS. The engineer will certify new SafeWord product releases, stage security patches, test MFA/RADIUS integrations, and work with operational and engineering teams to certify releases and troubleshoot complex production issues. The role helps maintain high availability, resilience, and security across enterprise authentication services. It also supports upgrades to legacy authentication components, integration of modern multifactor mechanisms, and migration of authentication services from virtual machines toward containerized, cloud-based OpenShift platforms.
Requirements
- At least 4 years of progressive experience in software engineering, application security, and/or infrastructure engineering, including a strong focus on authentication systems.
- Hands-on experience programming, debugging, and maintaining enterprise Java applications.
- Solid understanding of 2FA/MFA, OTP, and Challenge/Response architectures.
- Practical knowledge of RADIUS, LDAP/Active Directory, Kerberos, SAML, and PAM.
- Advanced proficiency in Linux/Unix system administration, process management, file permissions, and performance tuning.
- Strong Bash and KornShell scripting skills for task automation and system orchestration.
- Proficiency writing SQL and PL-SQL queries and scripts.
- Strong fundamentals in TCP/IP, DNS, SSL/TLS certificates, load balancing, and firewall rule configurations.
- Hands-on experience with Splunk, including search syntax, alerts, and dashboards.
- Hands-on experience with AppDynamics, including APM and transaction tracing.
- Working knowledge of cloud concepts, including AWS, GCP, or enterprise private clouds.
- Ability to collaborate cross-functionally with operations, security operations, and engineering teams.
- Clear written and verbal communication skills for technical documentation and incident retrospectives.
- Strong attention to security best practices, access governance, and audit readiness.
- Bachelor’s degree in Computer Science, Information Technology, Cybersecurity, Software Engineering, or a related technical field.
Nice To Haves
- Familiarity with containerization and orchestration technologies such as Docker, OpenShift, or Kubernetes.
- Experience in Financial Services, Banking, or another highly regulated enterprise environment.
- Industry certifications in Information Security or Networking, such as CompTIA Security+, Network+, CEH, or CCNA.
Responsibilities
- Maintain, enhance, and debug Java-based applications and microservices that support authentication flows and security controls.
- Evaluate software versions, third-party libraries, and security updates for compatibility, performance, and risk impact.
- Implement and configure authentication frameworks and protocols, including 2FA/MFA, OTP, Challenge/Response, and RADIUS.
- Certify new versions of the SafeWord authentication product before production rollout.
- Stage and validate security patches across authentication infrastructure.
- Test MFA and RADIUS integrations for functionality and compatibility across enterprise applications.
- Build and maintain Bash Shell automation scripts for operational tasks and deployments.
- Write and optimize database scripts and procedures using SQL and PL-SQL.
- Partner with operational teams to test, validate, and certify software releases before deployment.
- Support migration of authentication services from virtual machines toward containerized platforms on cloud ECS OpenShift.
- Support integration of modern multifactor authentication mechanisms across enterprise applications as part of legacy upgrade initiatives.
- Develop and maintain Standard Operating Procedures for authentication platform operations.
- Troubleshoot complex production issues and help maintain high availability, resilience, and security across enterprise authentication services.
Benefits
- Medical coverage
- Dental coverage
- Vision coverage
- 401(k)
- Life insurance
- Accident insurance
- Disability insurance
- Wellness programs
- Paid time off, including planned vacation time and unplanned sick leave
- Paid holidays
- Eligible employees may receive discretionary and formulaic incentive and retention awards
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What This Job Offers
Job Type
Full-time
Career Level
Senior
