Hire the best Deep Learning experts near Boston.

Toptal is a marketplace for top remote Deep Learning experts. Top companies and start-ups in Boston choose Toptal Deep learning freelancers for their mission critical software projects.
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Alejandro Correa Bahnsen

Member since July 20, 2015
Alejandro holds a PhD in Machine Learning. He has over 8 years of experience developing data science projects in different areas such as credit card fraud detection, credit scoring, collections, churn, and direct marketing. He enjoys giving talks on successful applications of big data science to different organizations. Moreover he is an active contributor to several open source projects such as scikit-learn. Click to continue
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Toptal in the press
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Testimonials
“My business relationship with Toptal has been nothing short of terrific. From reviewing my project with their team to choosing a highly-talented developer, and all the way through releasing our application, it has been an incredibly smooth and successful experience.”
Gary Craig
Senior Analyst @ NetApp
“Toptal makes finding a candidate extremely easy and gives you peace-of-mind that they have the skills to deliver. I would definitely recommend their services to anyone looking for highly-skilled developers.”
Michael Gluckman
Data Manager @ Mxit
“I really enjoyed my experience with Toptal. Searching for a developer was both painless and engaging, and the first match was a perfect fit! Toptal is a fantastic way to find talented developers for small or large aspects of your project.”
Willem Shepherd
Creative Director @ Mookieyams
“I'm incredibly impressed with the caliber of the Toptal developers I have worked with - they have proven themselves to be both dedicated and highly talented. We will most definitely continue to work with Toptal. ”
Savannah de Savary
Founder @ Industry Hub
“We recently launched our app with the help of Toptal and Nikola, an iOS developer. I was immediately impressed with the constant communication, detail, and level of talent that Nikola brought to the table. More importantly, when the project was underway, Nikola proactively provided creative workarounds for unforeseen hurdles and challenges. I couldn't be happier with our engagement and would highly recommend Nikola and Toptal.”
Chip O'Toole
Founder @ Humans Helping Robots LLC
“I can't say enough about how happy and confident I am in working with Enrique. He brings an enthusiasm to his profession that is very refreshing, constantly surprising us with his depth of knowledge and his capability to not only complete the task, but to surpass our expectations. He presents us with solutions that we would not have thought about ourselves, and sees the problem better than we can explain it.”
Chad Berryman
Senior Technical Lead @ Zoomedia
“We've been incredibly pleased with our experience working with Toptal thus far. Their team worked quickly and efficiently to isolate the needs of our project, and they paired us with an appropriate developer within a couple days who we quickly contracted after a great interview. The work performed on our project was top-notch, and we can’t wait to make use of Toptal’s resources again.”
Ryan Staake
Owner @ Pomp&Clout
“The task of finding and hiring the right developers and programmers can be daunting, especially for startups. After sifting through countless unfit freelancers, we came across Toptal. They were able to fill our open position in no time, and I'd highly recommend the service!”
Josef Holm
CEO @ Tubestart
“We've been very pleased with our experience working with Toptal. Their team was incredibly helpful in finding us the perfect developer for our project. The work was stellar, the communication was excellent, and we couldn't have been happier with the overall experience. We're excited to work with Toptal for more projects in the future. ”
Ryan Walker
Director, Product Management @ Rand McNally
“Robert was such a breath of fresh air. He was an excellent communicator and knew exactly what I was looking for. Now, I have a website that works better than I thought it could for less than the cost -- and in half the time -- it would have taken other developers. Robert is as good as they come, a true professional -- anyone thinking of working with him, hire him. You won’t regret it.”
Matthew Bennett
CEO @ Winning Social LLC
“I'm incredibly impressed with Toptal. Our developer communicates with me every day, and is a very powerful coder. He's a true professional and his work is just excellent. 5 stars for Toptal.”
Pietro Casoar
CEO @ Ronin Play Pty Ltd
“We're a small firm with big dreams. After trying 4 or 5 local or outsourced developers, we were out of options. I'd heard of Toptal, but was worried that my company wasn't big enough for them. After calling them up, I found out that I didn't need to meet any minimum budget and was immediately put in touch with a developer to talk through my problems and goals. A day later, he got back to me with a list of possible solutions. After 9 months and 5 developers, Toptal got me my solution in a single week at a price I could afford.”
Kevin Ramirez
Co-Founder @ SixtyVocab.com
“We've used Toptal developers multiple times for multiple projects, and they've always been world-class—regardless of whether they've been from South Africa, Brazil, or the United States.”
Alex Haro
CEO @ Life360

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