Applied Scientist - User Intelligence (AI)

Location: San Mateo, California, United States; the stated salary range applies to offices in California and New York.

Salary: $182,250–$218,500 USD per year, plus potential RSUs.

Company

hirify.global is a global advertising technology company developing privacy-focused personalization, targeting, and commerce experiences across apps, connected devices, and the open web.

What you will do

• Build and evaluate evidence-backed machine learning hypotheses and move successful approaches into production.
• Research attention and post-attention architectures using multimodal data for real-time advertising.
• Advance offline and online evaluation methods so model improvements produce measurable business impact.
• Use product data features to improve personalization models and identify high-value data sources.
• Contribute to model implementations, training pipelines, documentation, and infrastructure planning.
• Publish research, give talks, and participate in leading conferences.

Requirements

• PhD in machine learning, data science, or a related field preferred; a master's degree with strong industry experience is also considered.
• Demonstrated expertise in machine learning and deep learning through publications or production-scale model development.
• Fluency with PyTorch or JAX and the ability to implement complex vectorized operations.
• Experience with deep recommender systems, including two-tower and attention-based architectures.
• Experience with large-scale distributed data systems and production training and inference pipelines.

Nice to have

• Understanding of the advertising ecosystem, including OpenRTB, SSPs, DSPs, ad exchanges, and MMPs.
• Peer-reviewed publications at venues such as NeurIPS, KDD, or RecSys.

Culture & Benefits

• Entrepreneurial environment with autonomy, accountability, and a focus on high-impact problems.
• Medical, dental, and vision insurance, including a company-matched HSA.
• 401(k) company match, vacation, sick days, holidays, and parental leave.
• Flexible working hours, wellness stipend, employee assistance program, and pet insurance.
• RSU grants may be available, with opportunities for continuous learning and career development.