Machine Learning Engineer II/III (Applied Research & Model Development)
Boston (Onsite), New York (Onsite) Preferred, or RemoteRemote
Posted Apr 22, 2026
Where You Fit
We are seeking Machine Learning Engineers (Applied Research & Model Development) to join our team and tackle unique machine learning challenges to advance medicine and improve patient care. You will work closely with teams across biomedical data science, product development, translational research, MLOps, and platform engineering to develop and deploy machine learning models for our AI products and services. ## What You’ll Do
As an MLE (Applied Research & Model Development) at PathAI, your responsibilities will grow in scope as you progress through levels:
Design, develop, and deploy machine learning models for research and product development projects. - Collaborate cross-functionally with scientists, engineers, and product teams to translate biological and clinical requirements into scalable ML solutions. - Contribute to experimental design and analysis, including ideation, documentation, and reporting. - Participate in knowledge sharing and team initiatives (e.g., design reviews, journal clubs, ML best practices, governance activities). - Improve ML pipelines and infrastructure in partnership with MLOps and platform teams. - Publish and present scientific work, supporting abstracts, manuscripts, and conference contributions. Level-specific expectations:
MLE I: Contribute to projects with guidance, implement models, and learn best practices. - MLE II: Independently deliver on projects, improve processes, and mentor junior engineers. - MLE III: Lead initiatives end-to-end, set technical direction, and identify new opportunities with clear business and scientific impact. You will have the opportunity to work in a company where all employees put patients first. We believe that every team member provides valuable contributions to our success, and no task is too small for anyone if it's important to our company goals. Every PathAI employee is a contributor to our mission to pioneer better patient care by providing the best, most innovative AI tools to biotech, pathologists, clinicians and healthcare organizations. You will work alongside and with leading innovators in the field of AI and medicine and you will play a critical role in product development to impact patient outcomes. ## What You Bring
We welcome applicants across all MLE levels. Minimum qualifications differ by level:
MLE II:
Master’s degree plus 2–4 years of experience, or Ph.D. with 0–2 years of experience. - Proven track record of developing and deploying machine learning models into production or research applications. - Strong proficiency in Python, ML frameworks, and data pipeline development. - Demonstrated ability to work independently on projects, contribute to experimental design, and improve ML workflows. - Strong communication skills and ability to collaborate across scientific and engineering teams. MLE III
Master’s degree plus 5+ years of experience, or Ph.D. with 3+ years of experience. - Deep expertise in ML, computer vision, or biomedical AI, with a history of high-impact contributions (publications, open-source, or products). - Mastery of ML frameworks, software engineering best practices, and deployment pipelines. - Ability to lead end-to-end projects, mentor others, and set technical direction. - Experience articulating technical improvements into business or clinical impact. - Strong record of contributions to scientific strategy (abstracts, manuscripts, conference presentations). ## We Want To Hear From You
At PathAI, we are looking for individuals who are team players, are willing to do the work no matter how big or small it may be, and who are passionate about everything they do. If this sounds like you, even if you may not match the job description to a tee, we encourage you to apply. You could be exactly what we're looking for. We base our employment decisions on business needs, job requirements, and qualifications — that's all. We don't tolerate any kind of discrimination or bias, and we are looking for teammates who feel the same way.*
The cash compensation outlined below includes base salary or hourly wage and on-target commission for employees in eligible roles. The summary below indicates if an employee in this position is eligible for annual bonus, overtime pay and equity awards. Individual compensation packages are tailored based on skills, experience, qualifications, and other job-related factors. Annual Pay Range:
