Senior Application Security Engineer

At Shutterfly, we make life’s experiences unforgettable. We believe there is extraordinary power in the self-expression. That’s why our family of brands helps customers create products and capture moments that reflect who they uniquely are.

This is an exciting time for Shutterfly, and we are looking for a Senior Application Security Engineer (Offensive / Red Team) to join our team. In this role you will help shape an evolving offensive security practice, leading Red Team engagements against Shutterfly's critical applications while partnering closely with our Blue Team throughout each engagement to produce Purple Team outcomes — stronger detections, faster response, and measurably improved defenses.

We're looking for someone who is as passionate about uncovering and exploiting a vulnerability as they are about working alongside defenders to make sure it can be detected, contained, and remediated. Just as important, you'll partner with developers and engineering teams to educate them on how to prevent and avoid vulnerabilities in the first place, and guide them on how to fix issues once identified.

Your focus will be on building an offensive security capability that strengthens the entire security program, with collaboration between offense, defense, and engineering at its core.

• Red Team Operations:
  Plan and lead offensive engagements against Shutterfly's applications and supporting infrastructure using established offensive and testing techniques — manual web penetration testing, exploitation, fuzzing, and adversary emulation supported by industry-standard offensive tooling — and coordinate with third-party testers when engagements call for it.
• Purple Team
  
  Collaboration:
  
  Work hand-in-hand with the Blue Team throughout every engagement. Share tactics, techniques, and procedures in real time, validate and improve detection and alerting coverage, run collaborative exercises, and convert offensive findings into concrete defensive improvements.
• AI-Driven Offensive Security:
  Augment conventional offensive techniques with AI and LLM-based tooling to accelerate and extend offensive and testing work — reconnaissance, payload and test‑case generation, code and configuration review, and exploitation.
• Maintain a working understanding of how threat actors are weaponizing AI, and fold that knowledge into engagements and defensive recommendations to keep pace with a rapidly changing threat landscape.
• Bug Bounty Program Management:
  Manage the bug bounty program end to end — triage, impact assessment, risk scoring (CVSS), locating vulnerable code, providing mitigation guidance, thorough re‑testing, and refining program policy and scope as needed.
• Vulnerability Management:
  Identify, triage, and drive remediation of application vulnerabilities through manual testing and exploitation, escalating systemic issues to the appropriate engineering teams.
• Threat Modeling & Risk Assessment:
  Lead threat modeling exercises and perform risk assessments for new and existing applications, using offensive insight to prioritize the risks that matter most.
• Incident Response:
  Collaborate with incident response and Blue Team partners to investigate application‑related security incidents, applying offensive expertise to scope, reproduce, and understand attacker activity.
• Secure SDLC:
  Help define and reinforce secure development practices, including code reviews and integration of security checks into the CI/CD pipeline.
• Code Review:
  Perform and lead security reviews of critical PRs and code changes, and review code in most major languages.
• Security Architecture & Design:
  Partner with engineering and architecture teams to advise on secure systems and applications design, ensuring security is built in from the ground…