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

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

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

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

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

Dmitry Gordeev, Russia

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

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

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

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
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"Tech companies simply cannot find the quality employees they want to hire. The solution: Toptal."
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Toptal in the press
“Despite accelerating demand for coders, Toptal prides itself on almost Ivy League-level vetting.”
Selina Wang
“Toptal allows corporations to quickly assemble teams that have the right skills for specific projects.”
Steven Norton
Testimonials
“Best talent is here for sure. Toptal hiring and overall working experience has been wonderful. This is way better and faster than any other means of getting top talent.”
Rajesh Nagarajan
Co-Founder & CTO @ maxMantra
“Toptal was the best thing to happen to my web app. Initially, I hired a team of freelancers from India through another freelancing website—which was a nightmare. In fact, it was so bad that I had to start again from scratch, which is when I found Toptal. The experiences were like night and day. It was so refreshing to get partnered up with a quality developer that I could trust due to Toptal's extensive screening process. I will only use Toptal from now on and highly recommend you do the same.”
Chris Holtzhauer
CEO @ HootRecruit
“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
“John has been so great to work with! He has met all our requirements, done a speedy job with excellence, and has completed everything we’ve asked him to. Working with him has been a great experience.”
Jenny Lord
Communications Project Manager @ Lake Pointe Church
“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
“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 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
“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 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
“Working with Marcin is a joy, I can't find a better word. He is competent, professional, flexible, and extremely quick to understand what is required -- and to implement it -- even if the source code that's given to him is, shall we say, less than optimally elegant and clear. Oh and he has the same sense of humour as me. ;)”
André Fischer
CTO @ App Promotions
“Toptal is a great resource for startups with ever changing product roadmaps and budgets. We had highly skilled and reasonably priced Toptal developers working for us within 8 business days of our first conversation with Toptal. It has been an empowering experience for our company to start working with Toptal.”
Chris Clark
CEO @ ModernStat Labs
“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
“While looking for a high-level Python/Django developer, I found Toptal via a simple Google search, and that was a stroke of luck for our company. We needed a expert engineer who could start on our project immediately as we had a tight deadline. We were introduced to Simanas and immediately knew he was a great choice who had already been vetted... and he 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, and we are extremely happy with the results. Toptal is now the first place we look for expert-level help.”
Derek Minor
Senior VP of Web Development @ NetWorldMediaGroup
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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