Prompt Engineer

About Nabla: We are a team of entrepreneurs, clinicians and engineers committed to bringing back joy to the practice of medicine. Together with a community of clinician innovators, we’ve harnessed the best of machine learning science to develop Nabla – the leading AI assistant that’s restoring the human connection at the heart of healthcare. By streamlining clinical documentation, Nabla is helping clinicians focus on what matters most – patient care. Today, over 85,000 clinicians across 130+ healthcare organizations trust Nabla to support how they deliver care every day.

We’re at the start of an ambitious journey: Ambient listening, dictation, coding, and command capabilities are all converging into a proactive assistant that intuitively streamlines clinical and financial workflows. Backed by a recent $70M Series C, we’re hiring to build the next generation of clinical AI and improve the lives of clinicians and patients everywhere.

Prompt Engineering Role

We are looking for our first Prompt Engineer to own the quality layer of our LLM systems. You will work closely with Product, ML, and Clinical teams to design, iterate, and rigorously evaluate prompts that power our clinical note generation and our internal "judge AI" used to assess output quality (hallucinations, recall, style, clinical correctness). The role is ideal for someone who genuinely enjoys the craft of prompt design, evaluation, and iteration, and who brings rigor, patience, and taste to work that others often find tedious but mission‑critical. This role will likely start as freelance, with the possibility to expand over time.

Responsibilities

• Design, write, and maintain high‑quality prompts for clinical note generation and evaluation/judge models assessing hallucinations, recall, structure, tone, and adherence to clinical standards.
• Systematically iterate on prompts based on failure modes, edge cases, and real‑world usage.
• Define clear, measurable quality criteria for each type of output, including accuracy, completeness, style, and clinical relevance.
• Build and maintain prompt‑based evaluation frameworks to consistently score and compare outputs across models and prompt versions.
• Identify blind spots, regressions, and trade‑offs in model behavior.
• Treat prompts as production artifacts: versioned, documented, and tested against known failure cases.
• Create reusable prompt patterns and guidelines to ensure consistency and maintainability.
• Collaborate closely with ML engineers to surface model limitations and propose prompt‑level mitigations.
• Partner with Product and Clinical teams to translate qualitative expectations into explicit, testable instructions.
• Act as a bridge between what clinicians expect and what LLMs actually do.

Qualifications

• Prior hands‑on experience with prompt engineering for production LLM systems.
• Strong written communication skills and exceptional attention to detail.
• A rigorous mindset: enjoy defining criteria, edge cases, and evaluation frameworks.
• Comfort working with LLM APIs (OpenAI, Anthropic, Gemini, etc.) and structured prompt formats (system / developer / user messages).
• Basic scripting or tooling to run prompt tests (Python, notebooks, or similar).
• High tolerance for iterative, detail‑oriented work that requires patience and taste.
• Ability to reason about hallucinations, recall failures, ambiguity, and instruction‑following limitations.
• Interest in healthcare, clinical workflows, or safety‑critical AI systems is a strong plus.
• Autonomous and self‑directed; comfortable operating with minimal process in a fast‑moving startup environment.

Where We Are Based

Our offices are in Paris 3e (Arts & Métiers). Remote policy: 1 day a week (with some flexibility). Possibility to work remotely 1–2 weeks once a year.

Benefits

• Public transportation costs covered at 50%
• Exercise class during the workday: Yoga, running, Pilates, HIIT
• Culture of trust & accountability – your output matters more than your clock‑in time

Life at Nabla

When you become part of our company, you join a team of excellence‑driven, curious, and genuinely kind individuals. We are committed to making clinicians’ lives easier and improving healthcare experiences for everyone. We regularly engage one‑on‑one with clinicians, prioritize collaboration, and celebrate wins with team off‑sites and snacks.

Our Values

• Every day is a new chance to excel; we learn from failures and strive for excellence.
• We stay humble, putting collective success above individual accolades.
• Feedback is a gift; we foster a culture of trust and respect.
• Committed to diversity and inclusion: we welcome applicants from all backgrounds and seek a wide range of perspectives.

Diversity & Inclusion

As an equal opportunity employer, we actively seek out and welcome applicants from diverse backgrounds, believing that a wide range of perspectives enriches our team and enhances our ability to innovate and thrive. We embrace individuals from various backgrounds, including race, gender, educational history, sexual orientation, and more.

Avoid Recruitment Scams

There is an active employment scam using Nabla to collect personal information or financial details. If you’re contacted by a Nabla recruiter, ensure the individual truly represents Nabla and uses a nabla.com email address. Nabla will never ask for the exchange of money or credit card details during recruitment. Nabla uses a hiring platform for all applications; be aware of suspicious email activity from impersonators. Nabla does not accept unsolicited CVs from recruiters or employment agencies following the Nabla Careers page or any social media post. Any unsolicited CVs rejected or not accepted are deemed Nabla property.

Legal Notice

All descriptions are subject to modification. By applying, you acknowledge that all offers are preliminary and may change at any time.