Sr. Staff Back-End AppSec Lead

SentinelOne

16h•$184,000 - $235,000•Remote

About The Position

As a Sr. Staff Back-End AppSec Lead, you will be tasked with acting as a trusted advisor to customers by reviewing and validating AI-generated findings on Java and .NET back-end systems during high-stakes security engagements. You will be working directly with SentinelOne’s agentic code scanning pipeline to analyze vulnerabilities, apply expert human judgment, and communicate actionable results to both technical teams and executive stakeholders. You will help build and scale the Wayfinder Frontier AI Services practice by refining methodologies, improving AI-assisted exposure management workflows, and collaborating with elite offensive and defensive security experts.

Requirements

7+ years in application security or product security with a strong software development background.
Proven track record translating complex findings into technical and executive-level debriefs. Excellent written and verbal communication is essential.
Experience delivering customer-facing or consulting-style engagements end-to-end, comfortable in a distributed remote organization.
Expert-level Java / Spring, you've identified and explained vulnerabilities at the framework level, not just the application level.
Expert-level .NET Framework and ASP.NET Core, vulnerabilities and secure coding methodologies.
Mastery of OWASP Top 10, CWE Top 25, and modern authentication infrastructure (SAML, OAuth, OIDC, JWT internals).
Hands-on experience authoring custom static-analysis rules and queries for modern SAST engines; familiarity with AI-assisted code review workflows and validating findings produced by automated and agentic analysis pipelines.
Strong threat modeling experience throughout the secure SDLC.
Fluency with Git-based source control and CI/CD pipelines, including build-pipeline security controls, runner hardening, and release-gate enforcement.
Experience with AI accelerated development / code scanning methodologies.

Responsibilities

Lead Wayfinder Frontier AI Services customer engagements end-to-end, scope the work, deliver the technical findings, and present results to executive and technical stakeholders.
Review and triage findings from our agentic code scanning pipeline against customer Java and .NET codebases. Validate true positives, eliminate noise, and ensure every finding that reaches the customer is a decision they can act on.
Conduct deep code review across Java and .Net code and common frameworks.
Present findings to stake holders, translate technical risk into business impact and map exposures into end-to-end exploitation chains.
Author and maintain SAST rule packs that scale across the customer base, and partner with our AI/ML engineers to improve our agentic scanning engine.
Provide expert remediation guidance to customer development teams and validate fixes through follow-up review.
Work closely with our engineering teams to enhance our agentic code scanning pipeline, and reduce false positives.
Mentor Senior-level AppSec engineers and dev-skilled threat hunters; raise the technical bar of the practice and shape the service line's methodology, engagement playbooks, and scoping templates.