Prompt Engineer

Join Cantina Labs as a Prompt Engineer to shape the future of social generative AI and bring characters to life. Operate at the frontier of social generative AI, shaping how millions of users experience storytelling and connection through AI characters. Collaborate with product, design, and engineering to discover what makes AI characters engaging, scalable, and hyper-realistic.

Requirements

• Define and author core behavior system prompts that shape how Cantina bots express personality, emotion, dialect, and social behavior across text, voice, image, and video.
• Identify key personality traits that make AI personas compelling, and create datasets and prompt structures that reliably reproduce those traits.
• Prototype new bot traits and product features through prompt engineering and iterate based on qualitative and quantitative evaluation.
• Collaborate with research to build and maintain behavioral evaluations that measure bot performance, personality fidelity, and interaction quality over time.
• Review, refine, and evolve prompts as they move into production, helping establish best practices and launch criteria.
• Track emerging issues in bot behavior, prioritize improvements, and drive prompt-level solutions in ambiguous or high-impact areas.
• Document model quirks, prompting strategies, and guidelines to scale prompt development across teams.

Benefits

• Competitive salary
• Generous company equity
• Medical, dental, and vision insurance
• 42 days of paid time off
• Generous parental leave & fertility support
• 401(k) retirement savings plan
• Lifestyle spending account – $500/month to use however you’d like
• Complimentary lunch and snacks for in-office employees
• One Medical membership