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Principal Security Researcher

Company: Spellbook

Location: toronto, London

Posted: May 22, 2026

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Position Details

ABOUT THE ROLE

We are looking for a Principal Security Researcher to help us protect sensitive data at the source. You'll partner with the Director of Security & IT and work across the company to identify security risks, validate real‑world impact, and reduce risk across Spellbook's products, infrastructure, AI workflows, and internal operations.

This is a senior individual‑contributor role with broad influence. You'll move between original security research on legal AI and LLM‑enabled workflows, hands‑on offensive testing, secure product development partnerships with R&D and Engineering, and program‑level work that raises the maturity of how Spellbook approaches red teaming, threat modelling, bug bounty triage, and incident response.

RESPONSIBILITIES

  • Identify security risks across the company and partner with the relevant teams to reduce them.
  • Lead active red teaming, application security testing, penetration testing, exploit...