Senior AI/LLM Engineer

Censys

6d•$148,000 - $201,000•Remote

About The Position

Censys is seeking a Senior Software Engineer to join our SOC/TH team focused on AI and LLMs. The SOC-TH team builds intelligence-driven investigation workflows on top of the Censys Platform, helping analysts, threat hunters, detection engineers and incident responders triage, identify, analyze, and monitor malicious infrastructure at internet scale. We are defining Censys as the internet intelligence layer for the modern SOC by delivering deep third-party enrichments and real-time adversary infrastructure visibility to analysts in a single pane. The team transforms global internet scan data, threat intelligence, into AI-powered actionable insights. You'll work closely with product and across engineering teams dedicated to understanding customers’ business needs and to translate complex requirements into well-architected AI enabled interactions within our platform. By fostering a culture of learning and cross collaboration, we aim to build secure infrastructures tailored to our customers' unique requirements. You’ll help shape how the world sees the Internet building AI-powered experiences that make Censys platform smarter, sharper and more intuitive to explore every signal and threat.

Requirements

5+ years of software engineering experience, including 2+ years building and scaling AI-powered user-facing features
Strong proficiency in Python for backend and API services development
Familiarity with RAG evaluation frameworks (e.g., RAGAS, LangSmith) and designing regression testing for LLM pipelines
Ability to rapidly prototype, validate and refine AI features in a fast-paced, experiment-driven environment
Prior knowledge in prompt engineering improving LLM accuracy, reasoning and consistency
Understanding secure and responsible AI practices, implementing guardrails and safety checks to prevent misuse or data exposure
Hands-on experience with CI/CD pipelines, test automation, and deployment best practices for AI applications.
Strong cross-team collaboration to ensure AI capabilities elevate the overall user experience on the Platform

Nice To Haves

Leveraging AI tools as a force multiplier to code smarter, iterate faster boosting productivity and improving product capabilities
Advanced knowledge of AI/ML architectures, model evaluation, and applied deep learning
Experience with retrieval-augmented generation (RAG), vector search, and LLM fine-tuning
Understanding of embedding models and AI-driven analytics.
Proven ability to optimize AI models for low-latency, real-time interactions in browser or frontend environments
Experience deploying secure AI systems in cybersecurity or other sensitive data domains

Responsibilities

Rapidly prototype and deploy AI-powered features to enhance search, improve recommendations, and automate workflows across the Censys Platform.
Apply machine learning to streamline workflows, personalize experiences, and surface critical insights
Develop and fine-tune LLMs and RAG pipelines to reason over Internet-scale data, summarize findings, and deliver context-aware insights.
Build, scale and maintain AI-driven analytics and automation systems helping users make faster, data-backed decisions
Collaborate with frontend, product, and data engineering teams to integrate AI-native experiences that feel seamless, intuitive, and secure
Continuously evaluate and improve model performance through RAGAS, LangSmith, and automated regression testing frameworks