Hire the top 3% of freelance data scientists.

Toptal is a marketplace for top data scientists. Top companies and start-ups choose Toptal Data Science freelancers for their mission-critical software projects.
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Darin Erat Sleiter, Brazil

Member since September 13, 2016
Darin is a data scientist and engineer with a PhD in physics from Stanford. He's passionate about data and machine learning and has worked on data science projects across numerous industries and applications. Darin's co-founded an AI company and led a team of data sc... Click to continue

Eva Bojorges Rodriguez, Mexico

Member since October 16, 2014
Eva is a skilled back-end developer and machine learning engineer with experience in scalability issues, system administration, and more. She has a flair for well-structured, readable, and maintainable applications and excellent knowledge of Python, Ruby, and Go. She... Click to continue

Radek Ostrowski, Australia

Member since July 25, 2014
Radek is a certified Toptal Blockchain Engineer particularly interested in Ethereum and smart contracts. In the fiat world, he is experienced in big data/machine learning projects. He is a triple winner in two different international IBM Apache Spark competitions, co... Click to continue

Benjamin Wilson, Ph.D., Germany

Member since August 27, 2016
Ben is a Ph.D. mathematician and computer scientist with exceptional practical skills and extensive experience with machine learning systems. He has worked extensively with large clients in real-time bidding, recommender systems, knowledge management, and NLP (from r... Click to continue