Artificial Intelligence​/NLP Intern at Harmonyus

AI / NLP Intern – Prompt Engineering & LLM Workflows (Fall 2025)

Harmonyus
Miami, FL | Remote

Remote (U.S.

-based preferred)
Bonus if based in the Miami or Boston metro area

Part-Time Paid Internship

Fall 2025 Semester (August–December)
Start/end dates flexible with school calendars

10 to 20 hours/week (flexible schedule)

• Monthly stipend
• Academic credit available (subject to university approval)
• Computer Science
• Data Science
• Cognitive Science
• Psychology (with strong technical skills)
• Currently enrolled in an undergraduate or graduate program
• Comfortable working with LLM APIs (e.g., OpenAI, Claude, Gemini)
• Basic experience in prompt engineering and evaluating generative model output
• Strong communication and problem-solving skills
• (Bonus) Familiarity with Lang Chain, Lang Smith, Portkey, or vector databases
• (Bonus) Python experience for scripting, speaker diarization, or backend support

Harmonyus is a healthtech AI startup reimagining how couples and close relationships communicate. Our platform uses generative AI to detect red flags, encourage green flags, and help people feel seen and heard during conversations.

We're seeking a thoughtful, curious AI/NLP Intern to help us refine our real-time relationship analysis system. You’ll work directly with the CTO and founder on real-world LLM applications that power our core product. Ideal for students interested in applied NLP, conversational AI, or emotionally intelligent tech.

• Craft and iterate on LLM prompts for live communication analysis and feedback
• Benchmark and evaluate model responses for tone, accuracy, and helpfulness
• Explore improvements to our red flag detection and scoring logic
• Research and propose LLMOps tools for testing and model observability
• Prototype multi-step or agentic LLM workflows
• (Optional) Contribute to backend functionality like speaker identification or model fine-tuning
• Apply and deepen your skills in LLM workflows, prompt design, and evaluation
• Learn how to test and iterate on AI behavior in real product contexts
• Gain exposure to the intersection of technology, relationships, and psychology
• Contribute to the development of ethical, emotionally intelligent AI systems
• Build experience working in a lean, agile startup environment with hands-on mentorship

• Real-world experience deploying LLMs in a live, mission-driven product
• Direct mentorship from a technical CTO and engaged founder
• Exposure to AI product strategy, research, and experimentation
• The opportunity to shape technology that enhances human connection
• Onboarding with Harmonyus’s current LLM architecture
• Weekly check-ins with your technical mentor
• Access to internal tools, dashboards, and model evaluation frameworks
• Ongoing feedback and support from product and engineering leadership

Please submit:

• Your resume
• Why you're excited about Harmonyus
• One project or class where you worked with NLP, data, or LLMs

We’re an equal opportunity employer and strongly encourage applicants from underrepresented backgrounds in tech.