Senior Offensive Security Engineer - Web & AI Systems jobs in United States
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FocusKPI, Inc. · 16 hours ago

Senior Offensive Security Engineer - Web & AI Systems

positionMountain View, CA
timeFull-time
remoteOnsite
senioritySenior Level
money$85/hr - $100/hr
date5+ years exp

FocusKPI, Inc. is seeking a Senior Offensive Security Engineer to join a high-tech SaaS company. The role involves proactively identifying and eliminating security weaknesses across web platforms and AI systems, leading penetration tests, and influencing secure architecture practices.

AnalyticsConsultingInformation Technology
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H1B Sponsor Likelynote

Responsibilities

Conduct offensive security assessments on large-scale web applications, REST APIs, and cloud-backed services
Identify and validate vulnerabilities, including injection flaws, access control issues, authentication/authorization weaknesses, SSRF, deserialization, and logic bugs
Evaluate LLM-based systems and AI agents for prompt injection, data exfiltration, model abuse, and jailbreaks
Design and execute red–team–style engagements that simulate real-world adversaries
Develop custom exploitation tools, PoCs, and fuzzers for web and AI attack surfaces
Identify systemic security weaknesses and collaborate with engineering teams to drive long-term mitigations
Review architectures and designs for new products from an attacker's perspective
Produce clear, actionable security reports and present findings to technical and executive stakeholders

Qualification

Offensive securityWeb application securityAPI securityAI/ML security testingScriptingProgrammingCommon exploitation techniquesCloud securityAdversarial MLCuriosity about threatsClear communicationOwnership mentality

Required

Master's degree in Computer Science, Computer Engineering, Information Security, or a closely related technical field
5+ years of experience in offensive security, penetration testing, or red teaming
Deep expertise in web application security
Strong understanding of API security
Hands-on experience testing AI/ML or LLM-based systems, or strong motivation with demonstrated research in this area
Proficiency in at least one scripting or programming language (Python, Go, JavaScript, or similar)
Strong knowledge of common exploitation techniques and attacker tooling

Preferred

Prior work on adversarial ML, red-teaming AI systems, or secure LLM pipeline design
Experience with cloud security (AWS, GCP, Azure) and containerized environments
Background in security research, published CVEs, CTF experience, blog posts, or conference talks
OSCP, OSEP, OSWE, CRTO, or similar

Company

FocusKPI, Inc.

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Since our founding in 2010, we have become a premier data science and technology firm specializing in data analytics, AI, and staffing solutions.
dateFounded in 2010
location
Santa Clara, California, USA
people-size11-50 employees
web-link
http://www.focuskpi.com/

H1B Sponsorship

FocusKPI, Inc. has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (6)
2024 (6)
2023 (7)
2022 (1)
2021 (3)
2020 (6)

Funding

Current Stage
Early Stage

Leadership Team

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Peter Zhu
Founder & Chairman
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Company data provided by crunchbase