Senior Application Security Engineer: Secure SDLC & API Defense

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

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.