Who We AreFounded in 2012 by 3 expert hackers with no investment capital, Trail of Bits is the premier place for security experts to boldly advance security and address technology’s newest and most challenging risks. It has helped secure some of the world's most targeted organizations and devices. Our combination of novel research with practical solutions reduces the security risks that our clients face from emerging technologies. Our work helps drive the security industry and the public understanding of the technology underlying our world. Cybersecurity preparedness is a moving target. Companies like ours are the tip of the spear in the fight against attackers. Our research-based and custom-engineering approach ensures that our client’s capabilities are at the forefront of what’s available. For companies and technologies that live and die by their security, a proactive, tailored approach is required to keep one step ahead of attackers. Democratizing security information is essential. As part of our business, we provide ongoing informational support through blogs, whitepapers, newsletters, meetups, and open-source tools. The more the community understands security, the more they’ll understand why a company like ours is so unique and valuable. Role Trail of Bits seeks a Senior Security Engineer specializing in Application Security for Agentic AI systems, within our growing Software Assurance team. You will conduct comprehensive security assessments of large language model systems, examining software across the AI supply chain and application stack — such as LLM web applications, agentic coding tools, training data and inference pipelines, and guardrail mechanisms. Additionally, this role will be responsible for development, and operationalization of prompt injection techniques, for use in end-to-end application security reviews. You will identify and analyze novel attack vectors and vulnerabilities specific to AI and agentic environments, focusing on real-world failure modes, system integration issues, and unauthorized access vectors. This role allows you to apply application security experience and adversarial thinking to the latest agentic systems and buisness integrations. In addition to performing technical assessments, you will contribute to threat modeling, adoption risk frameworks for generative AI tooling, and delivering specialized training to clients on Agentic AI security concepts, including prompt injection, ML-specific attacks, and data pipeline threats. What You'll Achieve - Agentic AI Security Assessments: Conduct comprehensive application security assessments of agentic AI pipelines, tools, and frameworks for leading companies and labs. Examine vulnerabilities in model architectures, guardrails, and deployment infrastructure while developing mitigation strategies. - Prompt Injection Research & Development: Develop and share novel prompt injection techniques targeting agentic workflows, including indirect injection via tool outputs, multi-turn manipulation, and cross-agent exploitation. Produce actionable attack libraries and defensive countermeasures for client engagements. - Application Security Assessment: Conduct security assessments of client code bases using a combination of static analysis, dynamic testing, and manual code review, identifying vulnerabilities and developing mitigation strategies, with a focus on findings at the intersection of application security and Agentic AI security. - Threat Modeling: Conduct threat modeling and risk assessments to proactively identify potential risks for clients and develop mitigation strategies for future prevention, with particular attention to prompt injection attack surfaces in agentic orchestration layers. - Client Engagement: Work with leading industry teams to review system code and architecture, and help assure their products through system analysis and modeling. - AI Policy & Compliance Initiatives: Develop and contribute to AI regulatory frameworks, establishing assurance methods and auditing processes for mission-critical AI applications while ensuring alignment with emerging industry standards and safety requirements. What You'll Bring - AI Security Expertise: Demonstrated interest and experience in agentic AI security, with demonstrated ability to identify and mitigate AI-specific vulnerabilities across complex systems, including hands-on experience with prompt injection attacks and defenses. - Technical AI Knowledge: Deep understanding of AI/ML architectures, frameworks (PyTorch, Jax, LangChain, RAG systems, etc.), and MLOps practices, combined with robust security engineering expertise. - Application Security Skills: Track record of conducting technical security assessments of software, including software and system hardening, security policy analysis, and implementing effective security measures. - Prompt Injection Proficiency: Practical experience designing and executing prompt injection workflows against production LLM systems, agentic pipelines, and tool-use environments, including familiarity with emerging taxonomies and mitigation approaches. - Programming Proficiency: Strong knowledge of multiple programming languages such as Rust, Golang, Kotlin, Swift, Objective-C, JavaScript/TypeScript, Python, Ruby, C and/or C++ for both security analysis and tool development. - Hacker Mindset: A creative and adversarial mindset, with a passion for discovering novel attack vectors and understanding how systems work across many layers of abstraction. - Communication Skills: Ability to effectively communicate complex security concepts to diverse stakeholders and deliver clear, actionable recommendations. The base salary for this full-time position ranges from $100,000 to $200,000 excluding benefits and potential bonuses. Various factors influence our salary ranges, including the specific role, level of seniority, geographic location, and the nature of the employment contract. An individual's specific work location, unique skills, experience, and relevant educational background will determine the final offer within this range. The presented salary range encompasses the starting salaries for all U.S. locations. For a precise salary estimate tailored to your preferred location, please discuss it with your recruiter during the hiring process. Trail of Bits, Inc. participates in E-Verify, the US federal electronic employment eligibility verification program. Learn more. Only applications completed via our Careers page will be considered for further review. When you apply, you'll be added to our newsletter so you can stay updated on company news and opportunities. You can opt out anytime. BenefitsBenefits, Perks & WellnessTrail of Bits is our people, not a place. With over 100+ employees working from every time zone across the globe, our remote-first culture is built on autonomy and trust (and backed by smile-worthy benefits) for full-time employees: Empowered Living: - Competitive salary complemented by performance-based bonuses. - Fully company-paid insurance packages, including health, dental, vision, disability, and life. - A solid 401(k) plan with a 5% match of your base salary. - 20 days of paid vacation with flexibility for more, adhering to jurisdictional regulations. Nurturing New Beginnings: - 4 months of parental leave to cherish the arrival of new family members. - Our team is global and remote-first. However, if you are interested in moving to NYC, we offer $10,000 in relocation assistance to support your transition. Work & Life Enrichment: - $1,000 Working-from-Home stipend to create a comfortable and productive home office. - Annual $750 Learning & Development stipend for continuous personal and professional growth. - Company-sponsored all-team celebrations, including travel and accommodation, to foster community and recognize achievements. Community Impact: - Philanthropic contribution matching up to $2,000 annually.