Junior AI Prompt Engineer
đ Location: Los Angeles, CA (On-site) | đ Full-Time | đ Early Team
About Wonder Sciences
Wonder Sciences is building a whole new paradigm in mental healthcareâcombining clinical-grade science with the power of advanced AI to develop personalized, scalable solutions for anxiety, depression, and beyond. We operate at the intersection of neuroscience, machine learning, and human compassion.
Weâre currently in stealth mode, assembling a team of brilliant minds who care deeply about using technology to improve lives. If youâre ready to build something meaningful from the ground upâread on.
About the Role
Weâre looking for a Junior AI Prompt Engineer to join our core team in Los Angeles. Youâll be working closely with senior AI engineers, researchers, and clinicians to design, test, and optimize the language-layer that powers our proprietary AI systemsâused in real-time mental health assessments, therapeutic chat tools, and personalized care protocols.
This is a highly creative, technical, and mission-driven role for someone who loves language, logic, and AIâand wants their work to directly support human well-being.
What Youâll Be Doing
- Design and iterate prompts and prompt chains for large language models (GPT-4, Claude, Mistral, etc.)
- Collaborate with product and research teams to develop emotionally intelligent, clinically sound interactions
- Evaluate LLM responses for accuracy, tone, safety, and therapeutic relevance
- Prototype intelligent conversational flows and decision trees for both patients and providers
- Use retrieval-augmented generation (RAG), vector databases, and feedback loops to improve model performance
- Help document best practices, prompt libraries, and internal tools for scalable deployment
What Weâre Looking For
- Strong understanding of how large language models work and how to guide them through effective prompting
- Proficiency in Python and experience working with LLM APIs (OpenAI, Anthropic, Hugging Face, etc.)
- Experience with LangChain, vector databases (like Pinecone or Weaviate), and RAG pipelines
- Comfort working with structured data formats (JSON, YAML) and building testable prompt frameworks
- Ability to think both creatively (language, UX) and analytically (model behavior, logic)
- Bonus: Exposure to mental health, psychology, or digital health tools
You Might Be a Fit If YouâŚ
- Are fascinated by how language can shape human behavior, emotion, and healing
- Love working in a fast-paced, startup environment where you get to wear multiple hats
- Have 1â3 years of experience (or a strong portfolio) in AI, language tech, or applied NLP
- Are thoughtful, curious, and obsessed with doing meaningful work
- Are based in Los Angeles and excited to collaborate in person with a deeply mission-aligned team
Why Join Us Now
- Help build the language layer of a transformative mental health AI system
- Work side-by-side with world-class engineers, scientists, and clinicians
- Real ownership, impact, and rapid learningâon a product that could help millions
- Competitive salary, early-stage equity, and a front-row seat to one of the most exciting challenges in healthtech
How to Apply
Email your resume (and GitHub, portfolio, or sample prompts if you have them) to founders@wondersciences.com
Subject line: Junior AI Prompt Engineer â LA
Please include a short note (3â5 sentences) about why this mission resonates with you.