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Senior Machine Learning Engineer

Ontra

$176,000 - $264,000
Sep 26, 2025
San Francisco, CA, USA • Santa Barbara, CA, USA
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Ontra is seeking to revolutionize legal tech by designing and scaling advanced machine learning platforms, with a focus on evaluation, search and information extraction functionality, while driving improvements in AI capabilities and optimizing legal document review workflows.

Requirements

  • 5+ years in ML Platform/ML Ops roles.
  • Hands-on experience in creating Data Processing pipelines and infrastructure in support of LLM applications and experience with productionization of LLM based applications.
  • Demonstrated experience in deploying ML models in production environments, including the use of orchestration and monitoring tools.
  • Experience designing, building, and scaling Data and ML infrastructure using Kubernetes, Terraform, and AWS.

Responsibilities

  • Design, build, and scale advanced machine learning systems to automate the extraction and retrieval of legal obligations from complex private equity documents.
  • Build ML Platforms that will serve as foundations for building new GenAI & LLM applications.
  • Work closely with product, legal, and engineering teams to define project requirements and seamlessly integrate AI solutions into existing workflows.
  • Review and refine datasets and machine learning pipelines to ensure they deliver high performance, scalability, and are tailored to evolving needs.
  • Deploy and continuously monitor machine learning models in production, conducting experiments and implementing optimizations to improve model performance.
  • Drive measurable improvements in legal review processes and enhance end-user productivity through advanced AI applications and tools.

Other

  • To foster team connection and collaboration, this role requires being present in either our Santa Barbara or San Francisco office up to once a quarter for team meetings and off-sites. As such, we are only considering candidates who are currently based in California.
  • Occasional travel is required for Ontra employees, including typically at least twice per year to attend team and larger group off-sites for in-person collaboration.
  • If you are an innovative and analytical thinker with deep expertise in machine learning infrastructure and AI search platform, who thrives on solving complex, domain-specific challenges through advanced machine learning techniques, we’d love to get to know you!