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, Germany

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

Samir Makhani, United States

Member since December 17, 2017
As a former 500 startup CTO for Uguru.me (an Uber-like company for university tutors), Samir has developed and architected many full-stack apps from scratch. He uses his corporate background at Google (APM) and solution engineering experience from Yahoo to consult wi... 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