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Causal Inference / Scientific ML Scientist

Prepaire Labs

Full-time

Boston, MA

Job description

AI Engineer + Equity

Founding AI Engineer

A rapidly growing seed stage start up who helps organisations adopt AI safely and responsibly by building reliable, secure, and trustworthy AI-driven systems. We’re seeking an AI Engineer who enjoys hands-on development and applied research, owning problems from experimentation through to production.

You’ll be part of a small dedicated team that has real impact on the product and direction of the features. We’re not looking for someone who can do a background research role.

AI Engineer

What you’ll do:

  • Prepare and structure datasets for ML training and evaluation
  • Adapt and fine-tune large language models using prompt engineering and parameter-efficient methods
  • Deploy models into live applications and scalable APIs (Python/Go)
  • Evaluate performance, optimise latency and reliability, and design guardrails for generative AI
  • Collaborate with product, data, and engineering teams

Requirements:

  • Degree in Computer Science/AI/ML or related field
  • ~4+ years’ ML/Deep Learning experience (or PhD)
  • Experience with LLMs, NLP, and transformer models
  • Strong Python; familiarity with PyTorch/TensorFlow
  • Clear communication and collaborative mindset

Job Type: Full-time

Pay: $250,000.00 - $300,000.00 per year

Benefits:

  • 401(k)
  • Health insurance
  • Relocation assistance

Work Location: Hybrid remote in Sunnyvale, CA 94086