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Principal AI Engineer - Transform Cybersecurity at TENEX

TENEXSan Jose, CA
Hybrid Full-time $190K/yr - $250K/yr

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Experience Level

Mid to Senior

Qualifications

Job ResponsibilitiesArchitect and develop the AI infrastructure that drives autonomous detection, RAG-supported investigations, and automated remediation processes. Produce and deploy large-scale LLMs, graph reasoning engines, and streaming feature pipelines capable of handling billions of security events. Oversee evaluation and reliability—managing prompt libraries, fine-tuning, red-team testing, latency budgets, and fallback plans. Mentor and develop a team of AI engineers; conduct design reviews, enforce code quality, and promote a security-first approach. Collaborate closely with Product, Detection Engineering, and Customer Success teams to transform real-world attacker behavior into effective ML and rule-based detection systems. Innovate by exploring cutting-edge technologies such as retrieval-augmented generation, tool-calling agents, and multi-modal models (text, logs, graphs) to keep defenders ahead of the curve.

About the job

At TENEX, an innovative leader in Managed Detection and Response (MDR) solutions, we harness the power of AI and automation to bolster cybersecurity defenses. Our mission is to empower organizations by enhancing their security posture with state-of-the-art threat detection, swift response capabilities, and ongoing protection. Our team consists of seasoned experts specializing in cybersecurity, automation, and AI solutions. With backing from prominent investors, we are on an exciting growth trajectory and are actively searching for exceptional talent to help us redefine the MDR landscape.

As a Principal AI Engineer, you will play a pivotal role in designing, developing, and optimizing cutting-edge AI systems that are scalable and high-performing. Your expertise will be crucial in shaping the architecture of our AI-driven cybersecurity solutions, while you also provide mentorship to engineering teams and foster technical innovation.

Culture is a cornerstone of TENEX—visit our culture deck at culture.tenex.ai to see how we embody collaboration and community through in-person engagement.

Please note: This position requires being onsite Monday through Thursday at our San Jose, CA location, with the option for remote work on Fridays.

About TENEX

TENEX is at the forefront of cybersecurity innovation, specializing in AI-powered Managed Detection and Response (MDR) services. Our team comprises industry veterans dedicated to empowering organizations through advanced threat detection and automated solutions, ensuring robust protection against evolving cybersecurity threats.

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