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From the employer's careers site First seen 9 Nov 2026

Senior Security Researcher

Snyk Lisbon, Portugal On-site senior full-time

The employer hasn't listed a salary.

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Description

We're looking for a Senior Security Researcher to join our R&D team at Snyk. As a Senior Security Researcher, you will research and exploit weaknesses in LLM applications and autonomous agents. You will build attack tooling, agent harnesses, and reproducible evaluations that turn offensive research into measurable improvements in AI security and improve on Snyk's offensive security product offering.

Responsibilities:

  • Research and exploit weaknesses in LLM applications and autonomous agents
  • Build attack tooling, agent harnesses, and reproducible evaluations
  • Improve Snyk's offensive security product offering
  • Collaborate with the team to deliver research findings and recommendations
  • Communicate complex research findings to technical and non-technical stakeholders

Requirements:

  • Experience in AI red teaming, offensive security, LLM fundamentals, harness engineering, agent security, evals and benchmarks, experimental design, research engineering, failure analysis, and exploit validation and reporting
  • Strong Python skills
  • Experience with APIs, containers, browser automation, and building maintainable research tools
  • Excellent collaboration and communication skills

We offer a range of benefits, including employee resource groups, global benefits that help our employees prioritize their health, wellness, financial security, and a work/life blend.

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Skills

Required

  • AI red teaming
  • Offensive security
  • LLM fundamentals
  • Harness engineering
  • Agent security
  • Evals and benchmarks
  • Experimental design
  • Research engineering
  • Failure analysis
  • Exploit validation and reporting
  • Python
  • APIs
  • containers
  • browser automation

Ready to apply?

You apply with the employer directly. Their original posting is here: https://jobs.ashbyhq.com/Snyk/846693b2-f3c5-4b8c-a15f-02909b09a408

Apply on Snyk