About this opportunity
Arcitix Technologies lists this LLM Security Engineer opportunity in san francisco, California. Review the employer’s description below for duties, qualifications and application requirements.
Job description
Design and ship the guardrails behind our LLM firewall — prompt-injection filtering, output moderation, and agent authorization.
About the role
LLM Security Engineers own the guardrails behind our LLM firewall. You will build inline defenses against prompt injection and jailbreaks, design output moderation and leak prevention, and implement tool-call authorization for agentic systems.
This role sits at the intersection of product and security engineering — you ship code that runs in the critical path of customer AI applications, so correctness, latency, and false-positive rates all matter.
Key Responsibilities
Build inline guardrails for prompt-injection and jailbreak defense
Implement output moderation and PII/secret leakage prevention
Design tool-call authorization for agentic and RAG systems
Integrate guardrails with client RAG and agent pipelines
Benchmark guardrail efficacy against live red-team findings
Requirements
Bachelor's degree in CS or equivalent practical experience
4+ years in software or security engineering
Hands-on experience building LLM or agent applications
Strong Python and API-design skills
Solid grasp of LLM threat models and guardrail patterns
Nice to have
Experience with low-latency, high-throughput services
Familiarity with content-safety classifiers and embeddings
Prior work on developer-facing security products
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Worksite address
san francisco, CA, 94199, US
Who can apply
Review the original listing for work authorization, qualifications and employer requirements.