Sr. Application Security Engineer

TUS GBT US LLC (Amex GBT) is hiring a Senior Application Security Engineer to secure and maintain its cloud-native infrastructure. The role focuses on integrating security into software development and CI/CD, governing the safe use of agentic AI coding tools, supporting compliance, and mentoring engineers.

Responsibilities:

• Work with DevOps teams to design, implement, and maintain secure CI/CD pipelines that integrate security testing at every stage of the software development lifecycle
• Implement and tune automated security scanning, including SAST, DAST, SCA, and container scanning
• Deploy and support API security tools, ensuring findings are consistently reported to a central aggregator
• Collaborate with development teams to promote secure coding practices and provide security guidance throughout the development process
• Evaluate and help govern the secure use of agentic AI coding tools across engineering teams, establishing guardrails and detection strategies to mitigate risks such as hallucinated dependencies, injected vulnerabilities, and insufficient oversight
• Ensure compliance with industry standards relevant to the travel industry, including PCI-DSS, GDPR, and SOC 2
• Build KPI and metrics reporting for application security initiatives and present findings to leadership as needed
• Mentor junior engineers and promote a security-first culture across engineering teams

Requirements:

• 5+ years of professional software development experience with demonstrable expertise in major programming languages (Python, Go, Java, JavaScript/TypeScript); 3+ years of hands-on application security or DevSecOps experience
• Strong knowledge of OWASP Top 10 and related secure coding practices; deep understanding of API security, authentication protocols, and secure API design
• Strong cloud security expertise with at least one major cloud service provider (AWS, Azure, or GCP); deep understanding of cloud-native security including IAM, network security, encryption, secrets management, and compliance frameworks
• Proficiency with CI/CD tools and practical experience with infrastructure-as-code, containerization, and orchestration technologies; strong understanding of network security
• Experience with agentic AI programming (AI-driven code generation and autonomous coding agents); deep understanding of risks including hallucinated dependencies, insecure code injection, and governance gaps; ability to help teams mitigate AI-specific security threats
• Experience with threat modeling methodologies and risk assessment frameworks; ability to identify and communicate security risks to technical and non-technical audiences
• Knowledge of compliance frameworks including PCI-DSS, GDPR, and CCPA; experience establishing or contributing to governance frameworks and guardrails for safe adoption of agentic AI coding tools
• Three or more languages, such as Python, Go, Java, C#, Ruby, JavaScript/TypeScript, Bash, PowerShell, Swift, Kotlin, Objective-C, or Dart, among others
• AWS (EC2, ECS, EKS, Lambda, S3, IAM, CloudWatch, GuardDuty), Azure (VMs, AKS, Functions, Key Vault, Sentinel), or GCP (Compute Engine, GKE, Cloud Functions, IAM, Security Command Center)
• SAST/DAST scanners, WAF solutions, SIEM platforms, vulnerability scanners, secrets management tools
• GitHub Copilot, Cursor, Claude Code, or similar agentic coding tools
• AI/agentic code security scanners and governance platforms
• Jenkins, GitLab CI/CD, GitHub Actions, CircleCI, Azure DevOps
• Terraform, Docker, Kubernetes, Helm, Ansible
• Git, GitHub, GitLab, Bitbucket
• Background in penetration testing or red team operations; knowledge of MLSecOps practices including model security, data pipeline protection, and AI/ML supply chain security
• Professional security certifications (CISSP, GIAC, OSCP, AWS Security Specialty, Azure Security Engineer, or similar); multi-cloud experience across AWS, Azure, and GCP
• Experience in travel, hospitality, or e-commerce industry
• open-source contributions or security research publications demonstrating commitment to the security community