Senior AI Security Enginee
The world has fundamentally changed, and with it, the threat landscape. At Menlo Security, our unwavering mission is to enable secure connection, communication, and collaboration for the world, without compromise. In an era where digital transformation is paramount and threats are constantly evolving, we proudly secure Fortune 500 companies, 9 of the 10 largest global banks, and the Department of Defense.
As we scale rapidly from 400 employees into our next phase of innovation, we're seeking a pioneering Senior AI Security Engineer to join our elite team. This isn't just a job; it's a call to define the future of AI safety. You will be at the forefront of tackling the emerging and complex security challenges posed by autonomous AI agents, designing and implementing novel defenses against threats that are reshaping the digital frontier.
In this high-impact role, you will research, design, and implement cutting-edge techniques to detect and mitigate prompt poisoning, context manipulation, malicious agent behaviors, and other adversarial threats targeting agentic AI systems. Your work will directly translate into practical, deployable security controls that protect agents operating in real-world environments, especially when interacting with untrusted web content.
What You'll Be Doing: Core Responsibilities
Shape the Future of Agentic Security: Lead investigations into novel attack vectors against AI agents, including sophisticated prompt injection, context poisoning, adversarial content embedding, and the misuse of agent planning and reasoning mechanisms.
Architect Scalable Agentic Workflows: Design and implement robust, high-performance pipelines that establish secure agent-to-web interactions at scale.
Pioneer Detection & Mitigation: Develop and prototype groundbreaking approaches for identifying malicious prompts, unsafe contextual signals, and adversarial behaviors within LLM-powered agents.
Build Defensive Controls: Translate research into action by implementing these advanced techniques as critical security controls within agentic runtimes, ensuring agents can safely reason over and act on external data sources.
Collaborate and Integrate: Partner closely with applied engineering teams to seamlessly integrate research-driven security mechanisms into production systems, balancing robust security with optimal agent performance.
Proactive Threat Intelligence: Continuously evaluate the evolving AI threat landscape, anticipate future risks, and develop strategies as agent capabilities and autonomy accelerate.
Fortify Against Adversaries: Engineer and deploy defensive mechanisms within the browser surrogate to detect and neutralize complex context poisoning and injection attempts embedded within web content.
Who You Are: Qualifications
You are an ethical, hyper-organized, and service-oriented professional who is fanatical about seeing things through. You're humble enough to take feedback and coaching, yet confident enough to provide it, embodying empathy and agility in your work.
BSc in Computer Science or significant practical experience in high-scale cloud engineering; a relevant MSc or PhD is a strong advantage.
3+ years of experience in applied AI, with a proven track record of deploying high-scale AI systems in production environments. Direct experience with agentic systems in production is a significant plus.
Expert-level proficiency in Python; deep experience with Kubernetes (k8s) and cloud-native orchestration; strong skills in advanced data modeling and version control.
Significant experience in cybersecurity or browser-related technologies is highly preferred.
Deep understanding of prompt engineering techniques and the various ways they can be exploited in agentic systems.
Demonstrated ability to explore ambiguous problem spaces, experiment with novel ideas, and iterate rapidly toward effective security solutions.
Bonus Points: Nice to Have
Hands-on experience with AI orchestration frameworks (e.g., LangChain, AutoGen) and/or standardized communication protocols like MCP.
Experience building immutable event streams and high-speed data pipelines for real-time traffic analysis.
Understanding of web page rendering, DOM manipulation, or Accessibility Tree to enhance security.
A "security-first" mindset with a bias toward building auditable, traceable, and fault-tolerant systems.
Why Join Menlo Security?
You'll join a rapidly growing company, well-funded by top-tier investors including Vista Equity Partners, General Catalyst, JPMC, American Express, HSBC, and Ericsson Ventures, empowering you with the resources to innovate.
Our culture thrives on collaboration, inclusivity, and fun, guided by our core values: Stay Aligned, Get It Done, Customer Empathy, Think Creatively, and Help Each Other Out. We champion open communication, support new ideas, and share a mutual drive to achieve groundbreaking results. This is an opportunity to take significant initiative, implement your vision, and truly build a legacy in a domain that is reshaping the digital world.
Menlo Security is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, sex, color, religion, sexual orientation, gender identity, national origin, protected veteran status, or on the basis of disability.
TO ALL AGENCIES: Please, no phone calls or emails to any employee of Menlo Security outside of the Talent organization. Menlo Security’s policy is to only accept resumes from agencies via Ashby (ATS). Agencies must have a valid services agreement executed and must have been assigned by the Talent team to a specific requisition. Any resume submitted outside of this process will be deemed the sole property of Menlo Security. In the event a candidate submitted outside of this policy is hired, no fee or payment will be paid.