AI Agent Security Architect
$0k - $0k • Remote • Foster City, CA • FullTime
Posted 1mo ago
Job Location
Foster City, CA
Tech Stack
Remote Work Policy
Fully remote
Employment Type
FullTime
Categories
AI Agent Engineer
About the job
Replit is seeking an AI Agent Security Architect to be the primary technical authority for the security blueprint of Replit's autonomous and AI agents. This role involves designing, implementing, and maintaining runtime defense systems, guardrail frameworks, and sandboxing architectures for AI agents that execute code and invoke tools on the platform. The successful candidate will lead high-impact AI security initiatives, bridging the gap between AI behavior and cybersecurity controls for both technical and executive audiences.
Responsibilities
- Define the architectural vision and patterns for securing autonomous agent workflows, MCP integrations, multi-turn reasoning, and multi-agent coordination.
- Architect and deploy dynamic guardrail systems, semantic firewalls, and intent verification filters to prevent prompt injection and goal hijacking.
- Design secure, isolated environments (e.g., microVMs, WebAssembly) for agents to safely execute code and interact with host systems.
- Conduct specialized threat modeling and lead AI red-teaming initiatives to identify vulnerabilities in RAG pipelines, vector stores, and tool-calling interfaces.
- Architect fine-grained permission models and human-in-the-loop authorization for agents acting on behalf of users.
- Design data isolation and poisoning prevention controls for vector databases, RAG pipelines, and conversation memories.
- Define, document, and maintain secure design patterns and SDKs for AI agent development.
- Identify, quantify, and document agentic security risks and contribute to the Cybersecurity Risk Register.
- Design logging and telemetry standards for agent reasoning and tool execution to support incident response.
- Partner with GRC to translate AI security controls into audit documentation and support sales inquiries on AI safety.
Requirements
- 6+ years of experience in security engineering or architecture, with at least 2 years focused on AI/ML security, LLM application security, or agentic frameworks.
- Deep understanding of agentic architectures and protocols (e.g., MCP, LangChain, AutoGen, CrewAI, ReAct, vector databases).
- Hands-on expertise with agentic AI threat vectors (e.g., Indirect Prompt Injection, Goal Hijacking, Tool Parameter Tampering, Data Poisoning, Context Contamination).
- Strong background in safety standards and risk frameworks (e.g., OWASP Top 10 for LLMs & AI Agents, NIST AI RMF, MITRE ATLAS).
- Proficiency in Python, Go, or TypeScript/JavaScript with experience in code review and building security tooling.
- Experience authoring, maintaining, and evangelizing technical security architecture documentation.
- Exceptional ability to communicate complex AI risks to technical and executive stakeholders.
- Proven track record of contributing to an enterprise Cybersecurity Risk Register.
- Experience designing runtime sandboxing and isolation technologies (e.g., Firecracker, gVisor, Docker, WebAssembly) is a plus.
Benefits
- Competitive Salary & Equity
- 401(k) Program with a 4% match (US Only)
- Health, Dental, Vision and Life Insurance
- Short Term and Long Term Disability
- Paid Parental, Medical, Caregiver Leave
- Flexible Time Off (FTO) + Holidays
- Commuter Benefits (In-Office & US Only)
- Monthly Wellness Stipend
- Autonomous Work Environment
- In Office Set-Up Reimbursement (In-Office Only)
- Quarterly Team Gatherings
- In Office Amenities (In-Office Only)
