Hire the top 3% of freelance
CSLA developers.

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

Dmitry Gordeev, Russia

Member since August 20, 2014
Dmitry is a skilled software engineer with a strong mathematical background and primary experience on the .NET platform. His greatest passion is to transform mathematical theories into working software that covers practical needs. Click to continue

Matthew D. Groves, United States

Member since July 10, 2014
Matthew is an experienced, knowledgeable, and enthusiastic developer. He has experience in enterprise development, product development, and consulting. He is also deeply involved in the development community, serving as a user group organizer, conference organizer, and regular conference speaker. Click to continue

Maxim Arshinov, Russia

Member since June 13, 2013
Maxim is a seasoned software developer and has been a team member or team leader on numerous successful projects. He excels in both back-end and front-end development, as well as test automation. He is an expert with JavaScript and C#, and has often created website back-end features from scratch. Click to continue

Ernest Smith, South Africa

Member since April 9, 2015
Ernest began his career as a Computer Operator, but then transitioned to a Programmer, and finally a Systems Analyst. Using his evolving skill set, he started his own fraud prevention software company with two friends. Ernest also has experience in stock trading and IT. Click to continue

Nilesh Chaudhari, India

Member since October 2, 2012
Nilesh is a skilled developer with 8 years of experience in .NET Programming and proven ability to develop in a highly demanding and professional environment. He boasts solid expertise in all phases of the application development life cycle. He works hard to support the team in problem-solving and training. Click to continue

Vedran Skarica, Croatia

Member since July 28, 2015
Vedran is a skilled engineer with eleven years of experience in general software development, six years of experience in focused software product development, and four years of experience in Unity3D development. He works well both solo and in teams of any size. Click to continue

Aleksander Kowalczyk, Poland

Member since November 6, 2014
Aleksander is a Senior .NET developer with experience in software architecture design and analysis, project management, and team leadership. Thanks to the variety of industry sectors and roles in his background, he has the ability to learn quickly and to manage unexpected obstacles. Click to continue

Herberth Amaral, Brazil

Member since October 6, 2011
Herberth is an excellent developer and has tremendous experience working with large datasets. Herberth actively contributed to the success of several startup companies to attain their goals. He looks forward for a real challenge, where his skills will be put to the test. Click to continue

Vitaly Knyazev, Russia

Member since August 8, 2013
He has extensive experience and skills in web development and the .NET technology stack, and has successfully worked on group projects in positions ranging from programmer to group lead. Click to continue
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“Despite accelerating demand for coders, Toptal prides itself on almost Ivy League-level vetting.”
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“Toptal allows corporations to quickly assemble teams that have the right skills for specific projects.”
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Testimonials
“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 @ Harbor System Integrators, Inc
“With Toptal, we are able to find talented developers in a matter of weeks instead of months. The quality of talent they supply is extremely high as the developers are able to immediately onboard and ramp incredibly fast.”
Zac Carman
CEO @ ConsumerAffairs
“In our 2 years of operations this is by far the most enjoyable and productive working relationship we have had with a developer. I plan on continuing to recommend Toptal's services to other entrepreneurs I run into.”
David Sawyer
CEO @ TSOLife
“As a growing startup, finding top-notch engineering talent at affordable rates is one of the biggest challenges. After being frustrated with unreliable local contractors in New York, we turned to Toptal. We worked closely with Michal in Poland for 5 months and were thrilled with the results. Michal was an outstanding engineer who communicated flawlessly and took control of our project in ways that far exceeded my expectations. I give Michal and Toptal my highest endorsement and will continue to use and recommend them to anyone looking for software engineering talent.”
David Baker
Founder @ Spins.FM
“The best talent is at Toptal for sure. It's way better and faster than any other means of getting top talent.”
Rajesh Nagarajan
Co-Founder & CTO @ maxmantra
“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 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
“Sergio was an awesome developer to work with. Top notch, responsive, and got the work done efficiently.”
Dennis Baldwin
Chief Technologist and Co-Founder @ PriceBlink
“We needed a expert engineer who could start on our project immediately. Simanas exceeded our expectations with his work. Not having to interview and chase down an expert developer was an excellent time-saver and made everyone feel more comfortable with our choice to switch platforms to utilize a more robust language. Toptal made the process easy and convenient. Toptal is now the first place we look for expert-level help.”
Derek Minor
Senior VP of Web Development @ Networld Media Group
“In Higgle's early days, we needed the best-in-class developers, at affordable rates, in a timely fashion. Toptal delivered! ”
Lara Aldag
CEO @ Higgle
“One of their engineers from Colombia has joined our team as a full-time developer for more than 6 months, sometimes flying to work on-site in New York City with us. He is one of the best developers I've ever worked with.”
Carter Cleveland
CEO @ Artsy
“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 helped us when we had a hiring gap we needed to fill. The developer we received was excellent, with a great work ethic and fit in very well with the team. We are very happy with the service and would definitely consider using Toptal again in future should we need additional help. ”
David Gildeh
CEO @ Dataloop.io
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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