Plenful

Plenful

Senior Machine Learning Engineer

San Francisco, CA · Senior · Full-time

Sponsorship not specifiedDetected 86 days ago
PythonDockerKubernetesMachine LearningPyTorchNLPLLMsRAGMLOpsLangGraphComplianceHIPAAHL7/FHIREHR/EMRCollaboration

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Entry-level history0
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Lottery odds40
Fits your clock70

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About the role

  • Healthcare's back office still runs on faxes, PDFs and phone calls.
  • AI can take that work off people's plates, but only if it is accurate enough to trust with patient and financial data.
  • the agents, the models behind them, and the data and evaluation loop that improves both every week.

Responsibilities

  • Build the orchestration, tracing and failure recovery that keep agents dependable when inputs are messy.
  • Build and version datasets: labeled sets, golden sets and synthetic data drawn from production signal.
  • Follow HIPAA and Plenful's security and AI usage practices in how you build, test and log.

Requirements

  • Hands-on agent experience with a framework like LangGraph, and with RAG and vector search (for example Pinecone).
  • You have fine-tuned an LLM or VLM and can explain what improved and how you measured it.
  • You have built an evaluation harness and know why accuracy alone misleads and how to calibrate an LLM judge.
  • Comfort with large-scale datasets, databases and data pipelines.
  • Experience with traditional ML, and the judgment to know when a simpler model beats an LLM.

Nice to have

  • Serving and training at scale with tools like vLLM, FSDP or DeepSpeed.
  • Work in another regulated, high-stakes domain.
  • WHAT YOUR FIRST 90 DAYS LOOK LIKE
  • By day 30, you have shipped a change to a production agent or model.
  • 🚀 Mission-Driven, World-Class Team - Join an exceptional group of professionals aligned around a meaningful mission and committed to making an impact
  • 📈 Opportunities for Growth - Strengthen your expertise through collaboration with experienced, high-performing leaders across the organization
  • 💰 401(k) with Company Match - Plenful matches 50% of your first 3% contributed
  • Strong Python, plus PyTorch and Hugging Face Transformers.

Benefits

  • 🏥 Healthcare Coverage - Full medical, dental, and vision insurance for you and participation for your family
  • 📊 Equity - Every full-time employee shares in our success
  • 🌴 Unlimited PTO - Take the time you need, when you need it
  • 🍽️ Daily Lunch Stipend - $100/week to cover your midday meals
  • 💪 Wellness Stipend - $100/month to support your health and well-being
  • 🚇 Commuter Benefits - $100/month for SF and NYC-based employees
  • 👶 Parental Leave - Paid leave to support growing families
  • Plenful is on a mission to transform healthcare operations from the inside out.
  • Built by healthcare operators for healthcare operators, Plenful is driven by a deep understanding of the challenges facing today's care teams.
  • If you're excited to help shape the future of healthcare, we'd love to meet you.
  • Design, build and run production agents that use tools, retrieval and multi-step reasoning to finish healthcare workflows end to end.
  • Fine-tune and post-train LLMs and vision-language models on healthcare tasks, using methods like supervised fine-tuning, preference optimization and distillation.

Company info

  • Write evals that catch regressions before customers do: automated graders, LLM-as-judge calibrated against human labels, and regression suites that run in CI.
  • At Plenful, we build agents and models that do that work in production, with people in the loop wherever judgment matters.
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This listing is sourced directly from Plenful's careers page and normalized into a canonical job model.