Picasso, Paris

Sahar Banisafar

Data Scientist & ML Engineer  ·  New York

I’m a data scientist with a background in mathematics who went on to build production machine learning systems in ad tech. For six years, I worked at Omnicom Media Group’s data science practice, leading modeling efforts for major pharmaceutical and CPG clients—architecting end-to-end real-time bidding (RTB) systems, audience segmentation, and digital ad targeting solutions.

In September 2023, I stepped away from full-time work to deepen my understanding of modern AI. I wanted to move beyond using LLMs to truly understanding them, which led me to dive into transformers, LoRA fine-tuning, multimodal RAG architectures, and the geometric foundations of Computer Vision.

Outside of work, I’m a sculptor, photography enthusiast and have a deep love of cinema. I’m currently building a side project that brings these interests together.

I’m drawn to work that combines technical rigor with strong product and aesthetic judgment. The math has to be right and the thing has to be worth building.

I'm currently open to full-time ML/DS roles and freelance consulting on RAG and Computer Vision projects.   Get in touch →