Hire the top 3% of freelance
Cython developers.

Toptal is a marketplace for top Cython developers, engineers, programmers, coders, architects, and consultants. Top companies and start-ups choose Toptal Cython freelancers for their mission critical software projects.
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Hire Cython developers and engineers

Allen Gary Grimm, United States

Member since October 17, 2014
Fascinated by the intersection of abstraction and reality, Allen found his calling in data science. He seeks new ways to empower decision making with data. With his Masters of Science degree in Computational Intelligence and experience in data mining and predictive modeling, his speciality is in clustering, modeling, and predicting user behavior. Click to continue

Thomas Reinhardt, Germany

Member since March 11, 2015
Thomas started programming at the age of 9, and is fascinated by the world of computer vision, AI, and robotics. He has been working as a freelancer for about a decade. His focus is on algorithm development for challenging computer vision and machine learning tasks. He is a great communicator and an enthusiastic developer. Click to continue

Yasser Rashwan, Egypt

Member since August 4, 2015
Yasser is passionate about algorithms and problem solving. He enjoys taking on big problems, optimizing solutions, and providing insightful methods for solving those solutions. Yasser interned at Palantir Technologies where he worked with brilliant engineers from all over the world in an attempt to provide data-driven solutions to various customers. He is eager to learn and has the fundamentals necessary to make an immediate impact. Click to continue

Logan Raarup, Denmark

Member since July 6, 2015
Logan is a full-stack engineer who has been developing web applications for more than 14 years. He has worked with a wide variety of organizations, ranging from startups to large corporations, on projects that required knowledge about web applications, distributed systems, scientific computing, and embedded software. Nowadays, his primary tools are Node.js, Meteor, Ruby on Rails, Python, and PHP. Click to continue

Adnan Ademovic, Bosnia and Herzegovina

Member since May 12, 2015
Adnan is an engineer with experience in desktop, embedded, and distributed systems. He has worked extensively in C++ (working at both low and high levels), Python, and in other languages. He is experienced in developing complex algorithms and intelligent systems, optimization, networking, and signal processing. He is very passionate about problems faced by robotics and mechatronics in general. Click to continue

Mauro Schilman, Argentina

Member since April 30, 2015
While in high school, Mauro competed in several international math Olympiads and has since continued his love for problem solving and abstract thinking. He completed a master's degree in computer science and mathematics, and has done two internships with Google as an undergraduate. Click to continue

Andrey Bryzgalov, Russia

Member since May 12, 2014
Andrey is professional developer with 10 years of experience and a proven ability to develop efficient solutions for numerous platforms. He specializes in developing games and interactive virtual and augmented reality projects. He has worked both individually and as a group leader. Click to continue

Marcin Kosztołowicz, Poland

Member since March 5, 2015
A year ago, Marcin earned the master's degree in computer science and currently is a student of philosophy. During his studies, he worked as an Android developer for 2 years. Then, he participated in projects related to data analysis. Recently, he has been associated with a cognitive science laboratory. His passion for solving problems demonstrates his intense focus and desire to learn and use new technologies. Click to continue

Vladyslav Millier, Cyprus

Member since November 11, 2013
Vlad is self-motivated, versatile, positive software developer with work experience in many programming languages and frameworks. He is interested in architecting, building, and working with scalable systems and applications for complex problems. He is currently perfecting his knowledge of Scala and machine learning. Click to continue

Franco Risso, Argentina

Member since December 19, 2014
Franco has been working on PHP, MySQL, and JavaScript since the dark days of Internet Explorer 5. He loves REST APIs to separate consumers from providers and TDD to improve code quality. He thrives in Laravel framework for PHP and AngularJS for JavaScript. He has read extensively on startups and believes in their potential to bolster the economy and social progress. He is a proactive individual, constantly striving to improve his work. Click to continue
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Testimonials
“Marcos was a wonderful engineer and really helped us out on this project. Without him I feel like we really would have been at a loss.”
Jama Mohamed
Owner @ JM Technologies
“I needed help, and fast. I did not want to hire a random coder I met online- I was worried about security, and many other issues. Toptal was there when I needed them- and has been fantastic to work with. Outsourcing is full of terrible stories- Toptal is the story that is the giant exception. I give them my highest recommendation.”
Michael Feder
Founder & CEO @ PrayerSpark
“Getting set up with Toptal and finding a new team member was so easy, I don't know why anyone wouldn't give it a try. Best of all, we no longer have to worry about finding great people to help with our projects!”
Mike Branch
President & CTO @ HarborSI
“We have been with Toptal for over two years and have hired through them multiple times. They've never failed to deliver with world-class talent and customer service and have been our first choice when scaling our team.”
Stuart Reavley
Product Lead @ ClassDojo
“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
“Toptal has been extremely helpful to us in finding top remote talent. The ratio from interview to hire with Toptal candidates is the highest I've ever experienced in my professional career.”
Philipp Berner
Co-founder and CTO @ KeepSafe
“Toptal offers a no-compromise solution to businesses undergoing rapid development and scale. Every engineer we've contracted through Toptal has quickly integrated into our team and held their work to the highest standard of quality while maintaining blazing development speed.”
Greg Kimball
Co-Founder @ Nifti
“Toptal developers deliver. Hiring my first developer on Toptal was such a pleasant experience that I quickly turned around and hired another. Every developer I've hired on Toptal has been professional, skilled, and self-managing—a pleasant departure from the typical freelancer marketplace.”
Mike Riess
Owner @ RiessGroup
“We've been very pleased with our experience working with Toptal. Their team was incredibly helpful in helping us find 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
“Our experience with Toptal was very good. We had an open ended development project when we got started and the programmer from Toptal was very helpful, working with us on everything from the top level outline all the way down to development and delivery of functioning code." ”
Michael Milton
VP of Engineering @ SLANTRANGE
“Toptal is amazing! Sourcing and interviewing candidates has always been incredibly cumbersome and difficult - and usually takes weeks or months to find the right people. With Toptal, we had 5 candidates in 2 days that were all perfect for the job. They made the scheduling of interviews easy and straightforward and we were working with a top-level bad-ass developer within 2 weeks. I love you, Toptal.”
Ian Fosbery
CTO @ NMRKT
“Toptal has helped my business tremendously by finding, vetting, and recruiting the talent I need, at the right time. I’d definitely recommend it to others.”
Xavier Xicay
CEO & Creative Director @ Tuatara Corp
“My experience with Toptal has exceeded expectations. I needed to quickly find a front-end developer, and the first person they recommended was a perfect fit. A month later, I needed an iOS developer and they delivered again. I'm incredibly impressed with the quality of the people in Toptal's network and how quickly I was able to find a match for my needs. Greco is an amazing web developer. He has great attention to detail, in such a way that his websites look just like the design mockups we created on Photoshop. Not only that, but his code is very organized, and he proved to be very skilled in React.js. I couldn't have been happier with his contributions to our company. Vadim is a very experienced software engineer, particular in iOS. He was able to help us build our mobile app in record speed, and also contributed to major mobile and architecture decisions. Vadim is a proactive and intelligent engineer and has impressed us from day one.”
Bruno De Martino
Head of Product @ Token
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My team is going to personally help you find the best candidate to join your team.

Alvaro Oliveira
VP of Talent Operations