This range is provided by Harnham. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range $180,000.00/yr - $220,000.00/yr Direct message the job poster from Harnham Do you want to build machine learning models used by millions of people? Have you worked on personalisation, recommender systems, or GenAI applications? Are you ready to grow your career in a high-scale AI environment? A US-based social commerce marketplace with over 90 million users and 200 million+ listings is expanding its AI/ML organisation to deliver a personalised, discovery-first shopping experience. Backed by a major global tech & commerce group, the company is doubling its AI/ML squads from 3 to 7 this year, creating high-impact roles in engineering and data science. Role Summary As a Data Scientist II , you will work within a cross-functional AI squad to design, develop, and deploy models for personalisation, recommender systems, GenAI-powered seller tools, and trust & safety. You’ll collaborate with MLEs, product managers, and analysts to ensure models are robust, scalable, and impactful. Key Responsibilities Build and deploy ML models for personalisation, ranking, CV, and NLP Collaborate with MLEs and product teams on experimentation and optimisation Contribute to model monitoring and performance tracking Work under mentorship from senior DSs to expand technical depth Working Model: Hybrid – 3 days/week onsite (Bay Area, CA) Stack: Python, PyTorch, Spark, Databricks, GCP/AWS Interested? Please apply below. Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Job function Engineering and Research Industries Retail and Technology, Information and Media Referrals increase your chances of interviewing at Harnham by 2x Inferred from the description for this job Medical insurance Vision insurance 401(k) Get notified about new Data Scientist jobs in San Francisco Bay Area . San Francisco, CA $140,000.00-$170,000.00 3 days ago San Francisco, CA $121,900.00-$161,600.00 4 days ago Data Scientist Graduate (TikTok-Product-Data Science)-2026 Start (BS/MS) San Jose, CA $114,000.00-$177,777.00 1 week ago Senior Data Scientist, ML - Recommendations Fremont, CA $145,000.00-$204,000.00 4 days ago Mountain View, CA $136,301.00-$172,486.00 1 week ago San Jose, CA $130,000.00-$200,000.00 4 days ago San Francisco, CA $255,000.00-$405,000.00 3 days ago San Francisco, CA $122,000.00-$167,000.00 5 days ago Sunnyvale, CA $173,000.00-$242,000.00 1 week ago San Francisco County, CA $180,000.00-$250,000.00 21 hours ago San Francisco, CA $85,000.00-$120,000.00 2 hours ago Santa Clara, CA $170,000.00-$225,000.00 18 hours ago Sunnyvale, CA $145,000.00-$204,000.00 1 week ago Sunnyvale, CA $165,000.00-$180,000.00 4 days ago Fremont, CA $145,000.00-$204,000.00 1 week ago Data Scientist, Energy Analytics, Google Cloud Sunnyvale, CA $166,000.00-$244,000.00 1 week ago We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

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