Senior Machine Learning Engineer

Harnham is a high-scale consumer technology company leveraging machine learning to optimize user experiences. They are seeking a Senior Machine Learning Engineer to own and improve production machine learning models that impact key business metrics, working closely with Product, Data, and Engineering teams.

Responsibilities:

• Own and improve production machine learning models that directly impact key business metrics
• Work with large-scale datasets to improve prediction, ranking, recommendation, and optimization systems
• Partner closely with Product, Data, and Engineering teams to deliver measurable outcomes

Requirements:

• 5+ years of experience in Machine Learning Engineering, Applied ML, or Data Science
• Strong hands-on Python and SQL skills
• Experience building, deploying, and improving production ML models
• Experience working with large-scale datasets
• Strong understanding of feature engineering, model optimization, and experimentation
• Experience with recommendation systems, ranking, personalization, Ad Tech, search, marketplace optimization, or similar large-scale ML problems
• Ability to operate independently, take ownership, and drive technical decisions