Senior Application Security Engineer

ServiceTitan

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About The Position

Ready to be a Titan? At ServiceTitan, we are transforming product security into a core part of how engineering delivers software. We are looking for an exceptional Senior Application Security Engineer to help us build a "Secure Paved Road"—an automated, self-service ecosystem that enables our 80+ R&D squads to build securely by default. This role will define and scale how secure software is built at ServiceTitan by embedding security directly into the development lifecycle, from code to production. It will reduce organizational risk by automating detection and remediation of vulnerabilities, standardizing secure architecture patterns, and eliminating entire classes of security issues at their source. By partnering closely with engineering, this role will drive a shift toward secure by default development while continuously validating defenses through testing, threat modeling, and proactive simulation.

Requirements

• Experience: 5+ years of experience in Product/Application Security, with a strong background in software engineering.
• Coding Expertise: Proficiency in C#/.NET (preferred) or Go/Java. You must be able to read code to find vulnerabilities and write code to fix them.
• Modern AppSec: Experience moving security "left" using tools like GitHub Advanced Security (GHAS), dependency scanners, and secret detectors.
• Automation Mindset: Proven ability to script (Python, Go, PowerShell) and automate security tasks. You prefer building a tool to solve a problem over fixing it manually.
• AI Forward: Interest in the intersection of AI and Security, specifically in securing AI workloads, leveraging AI capabilities to embed security throughout the SDLC, and using AI agents for defense.

Responsibilities

• Build the Secure Paved Road (Pipeline and Code)
• Continuous Security Testing and Validation
• Architecture and Threat Modeling
• Operational Support and Engineering Partnership
• Continuous Improvement and Expertise

Benefits

• Flextime, recognition, and support for autonomous work: Flexible time off with ample learning and development opportunities to continue growing your career. We offer a comprehensive onboarding program, leadership training for Titans at all levels, and other programs and events. Great work is rewarded through Bonusly, peer-nominated awards, and more.
• Holistic health and wellness benefits: Company-paid medical, dental, and vision (with 100% employer paid options and 90% coverage for dependents), FSA and HSA, 401k match, and telehealth options including memberships to One Medical.
• Support for Titans at all stages of life: Parental leave and support, up to $20k in fertility services (i.e. IUI and IVF), surrogacy, and adoption reimbursement, on demand maternity support through Maven Maternity, free breast milk shipping through Maven Milk, pet insurance, legal advisory services, financial planning tools, and more.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed