
Notion
Senior
Build Notion's trust, safety, and AI-guardrail systems protecting millions of users
Notion needs a software engineer with 5-8 years of experience to build authentication, fraud/abuse detection, and AI safety guardrails protecting the workspace at scale. Based in SF or NYC with in-office Anchor Days (Mon/Tue/Thu), this role sits at the intersection of trust & safety, security, and AI-powered product features, partnering across Engineering, Security, Legal, and Data.
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What this interview tests
- Authentication and account security systems
- Fraud/abuse detection at scale (phishing, spam, scraping, ATO)
- AI safety guardrails for agents and LLM features
- Cross-functional partnership with Security, Legal, Data
- Ownership of ambiguous, unscoped problems
Common question themes
Tell me about a trust, safety, or security problem you owned end to end
How would you design detection for account takeover or credential stuffing
How do you think about guardrails for an AI agent with access to sensitive data
Describe a time you took ownership of an ambiguous problem with no clear owner
Have you used ML or LLMs to fight fraud/abuse — walk through the system
How do you balance blocking bad actors against not disrupting legitimate users
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