Senior Engineer – Cybersecurity Application Security

Relha LLC; Irving (TX); On-site; USD 120,000 - 180,000; Full time

Job summary

OneMain Holdings, Inc. seeks a Senior Engineer – Cybersecurity Application Security in Irving, TX to strengthen secure software development across the organization.

You will implement and maintain application security tooling, integrate security controls into CI/CD pipelines, and contribute to secure-by-design engineering practices. Strong collaboration with engineering teams and documentation of standards are essential.

Qualifications

• Bachelor's degree in Cybersecurity, Computer Science, Information Technology, Engineering, or a related field.
• 5+ years of application security engineering experience.

Responsibilities

• Implement, administer, and continuously improve application security tooling.
• Integrate security testing and security controls into software delivery pipelines and engineering workflows.
• Develop, maintain, and enhance application security standards, policies, procedures, documentation, and operational guidance.
• Analyze security findings, operational metrics, and compliance trends to identify improvement opportunities and areas of elevated risk.
• Partner with engineering teams to improve security adoption and enable secure-by-design and secure-by-default development practices.
• Support secure SDLC governance, vulnerability management, and remediation tracking activities.
• Collaborate with cybersecurity, architecture, platform, and engineering stakeholders to improve overall application security maturity.
• Contribute to security automation initiatives that increase operational efficiency and reduce manual effort.
• Support the secure implementation of emerging software development practices, including AI-assisted development workflows.

Education

Bachelor's degree

Tools

SAST

DAST

SCA

IAST

container security

API security testing

software supply chain security

Job description

Senior Engineer – Cybersecurity Application Security

Implement, administer, and continuously improve application security tooling supporting secure software development.

Integrate security testing and security controls into software delivery pipelines and engineering workflows.

Develop, maintain, and enhance application security standards, policies, procedures, documentation, and operational guidance.

Analyze security findings, operational metrics, and compliance trends to identify improvement opportunities and areas of elevated risk.

Partner with engineering teams to improve security adoption and enable secure-by-design and secure-by-default development practices.

Support secure SDLC governance, vulnerability management, and remediation tracking activities.

Collaborate with cybersecurity, architecture, platform, and engineering stakeholders to improve overall application security maturity.

Contribute to security automation initiatives that increase operational efficiency and reduce manual effort.

Support the secure implementation of emerging software development practices, including AI-assisted development workflows.

Required Qualifications

Bachelor's degree in Cybersecurity, Computer Science, Information Technology, Engineering, or a related field.

5+ years of application security engineering experience.

Experience implementing and administering application security platforms, including SAST, DAST, SCA, IAST, container security, API security testing, and software supply chain security capabilities.

Experience securing APIs across the development lifecycle, including API discovery, authentication and authorization validation, schema and contract testing, abuse-case analysis, OWASP API Security Top 10 risks, and remediation guidance.

Experience integrating security tooling and automated security controls into CI/CD pipelines using infrastructure-as-code (IAC).

Experience supporting secure SDLC governance, policy enforcement, compliance reporting, and remediation management.

Working knowledge of application security principles, secure coding practices, OWASP Top 10 risks, and common vulnerability remediation techniques.

Experience developing and maintaining technical standards, procedures, policies, and security documentation.

Strong written and verbal communication skills with the ability to influence technical stakeholders.

Ability to independently manage moderately complex security initiatives and contribute to broader cybersecurity objectives.

Preferred Qualifications

Industry certifications such as CSSLP, GSEC, CISSP, GWAPT, or similar.

Experience supporting financial services, banking, or other highly regulated environments.

Experience assessing, implementing, and governing security controls for AI-assisted software development workflows, including secure use of code-generation tools, prompt and output handling, developer guardrails, and risk monitoring.

Experience with security automation, scripting, and workflow orchestration.

Experience creating executive, engineering, or operational security metrics and dashboards.

OneMain Holdings, Inc. is an Equal Employment Opportunity (EEO) employer. Qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship status, color, creed, culture, disability, ethnicity, gender, gender identity or expression, genetic information or history, marital status, military status, national origin, nationality, pregnancy, race, religion, sex, sexual orientation, socioeconomic status, transgender or on any other basis protected by law.