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

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

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

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

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

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

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

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

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
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“We really enjoy working with Toptal. The experience has been very positive, and we'd recommend it to anyone seeking developers on-demand.”
Jeff Kerr
CEO @ CaseFleet
“We had a great experience with Toptal. They paired us with the perfect developer for our application and made the process very easy. It was also easy to extend beyond the initial time frame, and we were able to keep the same contractor devoted to the project. We definitely recommend Toptal for finding high quality talent quickly and seamlessly.”
Ryan Morrissey
CTO @ Applied Business Technologies, LLC
“I am more than pleased with the experience with Toptal. It may cost a little more, but because they pre-qualify and hand-pick the professional best suited for the job, it's well worth it. The professional I got to work with was on the phone (Skype) with me within a couple hours. I knew after discussing my project with him that he was the candidate I wanted to do the job, and I hired him immediately... and he wasted no time in getting to my project. He completed the job and went the extra mile to clean up older, messy code and even added some great design elements that enhanced our overall look. I would highly recommend Toptal to anyone needing to hire a professional. Great company. Great service. Thank you, Toptal.”
Paul Fenley
Director @ K Dunn & Associates
“One of our biggest and most time consuming problems is finding qualified staff. We need to find the correct platform to advertise on, create a proper ad, filter through tons of useless applications to try and find the small gems, interview and test the capabilities of applicants to see if they fit our profile and finally take a risk by hiring. This was the old way of doing things! The new way: describe the job position to our Toptal account manager, interview a few qualified applicants, hire with a risk-free trial! Much faster, a lot easier and with incredible end results.”
Catalin S. Balaci
Owner @ EvoBits Information Technology SRL
“Chris Wood is an absolutely exceptional Python developer, and the single most efficient programmer I've ever worked with. From the beginning of the project, Chris was instantly a vital member of the team. He's proactive, self-managed, knowledgeable, and efficient. I point him in a direction, and he delivers. Chris will be a part of the Crisis Cleanup team as long as I have anything to say about it.”
Aaron Titus
Project Manager @ Crisis Cleanup
“I've gotten 1 developer from Toptal so far. He's a really good part of our team. I'm planning on adding another from Toptal in the near future. Toptal is a big help these days when recruiting is a big part of my job.”
Aaron Rubin
Founder & CEO @ ShipHero
“Toptal’s ability to rapidly match our project with the best developers was just superb! The developers have become part of our team, and I’m amazed of the level of professional commitments each one of them have demonstrated. For those looking to work remotely with the best engineers, look no further. Thank you, Toptal.”
laurent Alis
Founder @ Livepress
“We've actually remodeled the way we do our work to take advantage of Toptal's capabilities. We develop pseudo code with some code fragments and send to our Toptal developer with a specific task set. The work is then further processed by the next group of Toptal engineers. It's been very efficient and we've seen a massive improvement in our development speed.”
William North
CTO & Co-Founder @ Swizly
“The developers I was paired with were incredible—smart, driven, and responsive. It used to be hard to find quality engineers and consultants. Now it isn't.”
Ryan Rockefeller
CEO @ Radeeus
“Back in July '12, FundedByMe needed to quickly scale our development team to create the equity crowdfunding leg of our operation. Working with a small budget, we couldn't spend time on vetting candidates, so we turned to Toptal. They identified a stellar developer that truly set the bar when it came to delivering product.”
Arno Smit
CTO @ FundedByMe.com
“We have been incredibly happy with our Toptal experience. Initially a skeptic, the process to find and recruit a fabulous iOS developer was very easy. Rather than sifting through hundreds of CVs, we saw two and hired them. They have worked effectively, getting up to speed incredibly quickly and have almost become part of the team. We would definitely use Toptal again. ”
James O'Day
Co-Founder @ Pearlshare
“I struggled for weeks with a Youtube API-specific problem and couldn't find anyone to solve it. Toptal immediately identified the right consultant who took the time to investigate the issue and resolve it quickly. The process was seamless and I will continue to use Toptal with any other issues that arise.”
Rohit Gupta
CEO @ Bollyshake
“Ignacio is one of the most diligent software developers that we have ever worked with—we feel like he's part of the family. He has always been flexible enough to work on our team's schedule and never misses deadlines. Toptal gets you the talent you need, on your timeline, keeping the process very low friction.”
Austin Evarts
CEO @ GoChime
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My team is going to personally help you find the best candidate to join your team.

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VP of Talent Operations