Sr Applications Security Engineer

Job-ID: 24619Category: RD Network Security ArchitectLocation: Sunnyvale, CA, United StatesWorkplace: HybridSchedule: Full timePosted: 2026-10-23Fortinet is looking for a Sr. Application Security Engineer to join the Corporate Information Security team. This is a highly technical role, with responsibilities conducting security reviews on various Fortinet applications, providing security education to our engineers and handling externally reported vulnerabilities.Key Responsibilities:Serve as an application security subject matter expert who provides guidance to internal teamsWork closely with development teams, perform code reviews, penetration tests, and architectural reviews on existing codes and new features.Develop, implement, and communicate vulnerability mitigation strategies to development teamsHandle externally reported vulnerabilities as a member of Corporate Information Security Responsible Disclosure Program committee. Drive Fortinet static and dynamic application security testing program.Develop strategies, evaluate solutions, design and implement tools, processes and controls to ensure that security and privacy are designed in Fortinet applicationsAdvise development teams on SDLC best practices.Proactively research new attack vectors on applications that may affect Fortinet applications and infrastructure.Be part of a global distributed team to share knowledge, workload and assignments. Strong sense of teamwork is required. Coach peers in application security concepts and best practices.Required Skills/Experience:5+ years of work experience as an Information Security Researcher or Engineer3+ years of experience with manually auditing source code to find security issues or programming skills in one or more of: Java, .NET, Python or JavaScript frameworks.Strong understanding on OWASP TOP 10 vulnerabilities.Strong understanding of common API security risksStrong understanding on Cloud-Native application architecture, microservices, containerization technologies, secure deployment and implementation issues.Proven experience in application penetration testingProven experience in security code reviewProven experience in application security testing (DAST, SAST, IAST, SCA) tools and processesStrong foundation in computer and network security, authentication & authorization, security protocols and applied cryptographySolid understanding with web security standards such as CSP, SOP, CORS, and emerging web security technologies.Solid understanding on CI/CD pipelines, build systems and DevSecOps principles.Strong understanding with AI&ML & LLM concepts like RAG, Agentic Workflows, MCPs, Skills, AI Red Teaming, AI Guardrails and Secure AI development and deployment strategies.Experience defining security architecture patterns and standards in a large enterprise organization.Experience with cloud-based security solutions and familiarity with cloud service providers, particularly in relation to application securityExperience working with threat modeling methodologies such as MITRE ATT&CK, STRIDE, PASTA etc.Understanding of OAuth and JWT implementations.Ability to organize & communicate effectively, both written and verbal, with technical and non-technical people across functional teamsA BS degree in Computer Science, Cyber Security, other tech-related degree, or equivalent experience.Experience in Cloud Security Posture Management (CSPM) and/or Application Security Posture Management (ASPM) tools is a plus. Having OSWE OSCP, GWEB, GPEN or similar certificate is a plusExperience in Mobile Application Penetration Testing is a plusMust be authorized to work in the U.S. without sponsorship.The US base salary range for this full-time position is $170,000-$240,000. Fortinet offers employees a variety of benefits, including medical, dental, vision, life and disability insurance, 401(k), 11 paid holidays, vacation time, and sick time, as well as a comprehensive leave program.Wage ranges are based on various factors, including the labour market, job type, and job level. Exact salary offers will be determined by factors such as the candidate's subject knowledge, skill level, qualifications, experience, and geographic location.All roles are eligible to participate in the Fortinet equity program. Bonus eligibility is reviewed at the time of hire and annually at the Company’s discretion.Why Join Us:We encourage candidates from all backgrounds and identities to apply. We offer a supportive work environment and a competitive Total Rewards package to support you with your overall health and financial well-being.Embark on a challenging, enjoyable, and rewarding career journey with Fortinet. Join us in bringing solutions that make a meaningful and lasting impact to our 890,000+ customers around the globe.About the companyFortinet (NASDAQ: FTNT) secures the largest enterprise, service provider, and government organizations around the world. Fortinet empowers its customers with intelligent, seamless protection across the expanding attack surface and the power to take on ever-increasing performance requirements of the borderless network - today and into the future. Only the Fortinet Security Fabric architecture can deliver security without compromise to address the most critical security challenges, whether in networked, application, cloud or mobile environments. Fortinet ranks number one in the most security appliances shipped worldwide and more than 500,000 customers trust Fortinet to protect their businesses.We are committed to providing reasonable accommodations for all qualified individuals with disabilities. If you require assistance or accommodation due to a disability, please contact us at View email address on click.appcast.io is an equal opportunity employer. We value diversity in our company, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, age, military/veteran status or any other applicable legally protected characteristics in the location in which the candidate is applying.