At Delphi, we are redefining how knowledge is shared by creating a new medium for human communication: interactive digital minds that people can talk to, learn from, and be guided by.
The internet gave us static profiles and endless feeds. Delphi is something different: a living, interactive layer of identity. It carries your voice, perspective, and judgment into every conversation—so people don’t just read about you, they experience how you think.
Our mission is bold:
Make human wisdom abundant, personalized, and discoverable.
Preserve legacies, unlock opportunities, and scale brilliance across generations.
Delphi becomes everyone's living profile to show what you know.
We are trusted and loved by thousands of the world’s most brilliant minds from Simon Sinek to Arnold Schwarzenegger (interact with all of them here). We have tripled revenue, users, and Delphi interactions in the past 6 months - all organically through word of mouth. We plan to accelerate even further from here.
Delphi’s investors include Sequoia Capital, Founders Fund, Abstract Ventures, Michael Ovitz, Gokul Rajaram, Olivia Wilde, and dozens of founders from Lyft, Zoom, Doordash, and many more. Our team includes founders with successful exits and builders from Apple, Spotify, Substack and more.
Learn more about Delphi and this position by calling the CEO’s digital mind here!
The RoleWe're seeking an experienced Prompt Engineer to join our AI team. You'll design and optimize prompts for large language models, pushing the boundaries of AI capabilities while building practical solutions for complex research challenges.
What You'll DoDesign and optimize complex prompts for various LLMs to train our mind architecture.
Develop systematic approaches using few-shot learning, chain-of-thought reasoning, and advanced prompting techniques
Collaborate with research scientists to integrate prompt engineering into AI research projects
Conduct experiments to evaluate prompt performance and document best practices
Stay current with latest developments in prompt engineering and contribute to research publications
Minimum 2 years of hands-on prompt engineering experience with production LLM applications
Bachelor's degree in Computer Science, AI/ML, Linguistics, or related technical field
Extensive experience with multiple LLM APIs and platforms (OpenAI, Anthropic, Google)
Strong understanding of transformer architectures and natural language processing
Experience with systematic prompt evaluation and A/B testing methodologies
Research background in NLP/ML preferred; published work in prompt engineering a plus
We work on hard problems. Our team is full of former founders, and entrepreneurial individuals who are taking on immense initiatives.
There is extreme upside. Very competitive salary and equity in a company on a breakout trajectory.
We push each other. Work from our beautiful Jackson Square office in San Francisco, surrounded by peers pushing to do their best work.
Benefits
Unlimited Learning Stipend: Whether it’s books, courses, or conferences, we want to support your growth and development. The more you learn and improve your craft the more effective we will be together.
Health, Dental, Vision: Comprehensive coverage to keep to take care of your health.
401k covered by Human Interest.
Relocation support to SF (as needed)
If you’re looking for just a job, Delphi isn’t the right fit. But if you want to shape the future of human connection, scale wisdom for billions, and build something that will outlast us all - you’ll feel at home here.
Top Skills
What We Do
Your Mind. Now on Demand.
Delphi creates a digital you - Scale your expertise, grow your impact, and unlock new income streams—24/7.
