Senior Software Engineer, Trust & Safety

What you will do:

• Analyze threat actor behavior and evolving abuse patterns across large, heterogeneous datasets to inform detection logic, policy decisions, and scalable mitigations.
• Research, prototype, and implement state-of-the-art LLM-driven techniques for abuse detection, classification, and prevention.
• Design and develop production-ready systems that detect and disrupt abusive behavior across the Vercel platform.
• Build, maintain, and fine-tune internal tools, datasets, and evaluation pipelines for trust and safety workflows.
• Collaborate closely with security, product, and infrastructure teams to bring research ideas into stable, scalable production systems.

About You:

• 5+ years of experience in abuse prevention, trust & safety, or security engineering.
• Strong programming skills in JavaScript/TypeScript and Python.
• Hands-on experience working with LLMs, including prompt engineering, evaluation, and fine-tuning.
• Solid understanding of cloud infrastructure, including AWS.
• Strong understanding of real-world threat actor behavior and abuse tactics.
• Experience owning systems end-to-end, from initial research through production deployment and iteration.

Benefits:

• Competitive compensation package, including equity.
• Inclusive Healthcare Package.
• Learn and Grow - mentorship and events.
• Flexible Time Off.
• Gear and WFH budget provided.

San Francisco, CA base pay range: $196,000 - $294,000 USD. Actual salary based on skills, experience, and location.