AI Prompt & Agent Developer

Fluency Digital, Inc.; San Francisco (CA); On-site; USD 90,000 - 120,000; Full time

Job summary

Fluency Digital, Inc. in San Francisco is seeking a skilled professional to work on their enterprise AI platform, which automates voice sales conversations for healthcare organizations. The candidate will debug clinical-recruiting agent inaccuracies and improve system prompts to ensure high call quality.

The ideal applicant has 2+ years of experience in LLM-powered applications, particularly in prompt engineering, proficient in Python and TypeScript, and a solid understanding of healthcare compliance constraints.

Qualifications

• 2+ years building or testing LLM-powered applications.
• Direct prompt-engineering experience.
• Demonstrated ability to evaluate conversational AI quality.

Responsibilities

• Debugging mispronunciations in voice sales conversations.
• Rewriting system prompts for better call quality.
• Listening to recordings and tracing failure trees.

Skills

Prompt engineering

Proficiency in Python

Proficiency in TypeScript

Evaluating conversational AI quality

Familiarity with healthcare compliance

Job description

Enterprise AI platform automating voice sales conversations for healthcare organizations

You'll spend mornings debugging why a clinical-recruiting agent mispronounced "anesthesiology," then afternoons rewriting system prompts until phone calls pass for human. It's QA as forensic work: listening to recordings, tracing failure trees through Python pipelines, and stress-testing voice agents against edge cases no one predicted. The goal isn't coverage metrics—it's call quality that keeps hospitals from hanging up.

What we're looking for:

• 2+ years building or testing LLM-powered applications, with direct prompt-engineering experience
• Proficiency in Python and TypeScript for writing test harnesses and debugging agent logic
• Demonstrated ability to evaluate conversational AI quality beyond automated metrics—listening, scoring, iterating
• Familiarity with healthcare compliance constraints or regulated-industry QA standards
• On-site in San Francisco, working alongside voice engineers and sales teams in tight feedback loops
• Must be based in the United States.

Tech stack:

Python, TypeScript