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Hire the best algorithm developers near Chicago.

Toptal is a marketplace for top remote algorithm developers. Top companies and start-ups in Chicago choose Toptal Algorithm freelancers for their mission critical software projects.
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Hire remote algorithm developers near Chicago or in a similar time zone

Alexis Hernandez

Member since February 28, 2015
Alexis taught himself how to program while he was in high school, in an environment with very limited internet access and no guidance. Despite all of this, he fell in love with coding. He's a generalist who has worked in a lot of areas—from embedded devices to web applications. He sets a high bar for code quality and applies good coding and security practices. He's currently building scalable microservices with Scala and Play Framework. Click to continue

Mario J. Wunderlich

Member since October 28, 2016
Mario is a software engineer with over 20 years of experience and an entrepreneurial spark. He is a generalist more than a specialist with expertise in a number of fields. He loves to learn, to create, to experiment, and especially loves to work and immerse himself in interesting projects. His current focus is in full-stack web development, but he's also interested in mobile development, RESTful APIs, bots, UX, machine learning, and big data. Click to continue

Dany Farina

Member since September 12, 2016
Dany has more than 10 years of experience developing applications on the .NET platform, using C#. He has experience building standalone desktop applications and web-services. He also has expertise in algorithms and optimization which he keeps honed by participating in programming competitions. He has worked with teams of all sizes and has experience leading small development teams. Click to continue

Marcel Zięba

Member since September 8, 2016
Marcel has over ten years of experience developing fast and highly scalable applications. He has worked for big companies, including Google, but also for small and successful startups. He is a fast learner and he loves working with cutting-edge technologies. Click to continue

Wilber Torres Cristobal

Member since March 17, 2015
Wilber is a senior Java developer and problem Solver with experience bringing up distributed and scalable architectures as well as refactoring and optimizing existing ones. He has the ability to learn quickly and is always committed to delivering top-notch solutions. He is always looking for challenges and staying up-to date on the industry's latest tech Click to continue

Etienne de Boursetty

Member since April 10, 2016
Etienne has been working in the financial industry for 10 years, building models and market analysis tools for traders at world class financial institutions and hedge funds. Working primarily in C#, he has designed and developed large scale data analysis platforms that allowed business-focused team members to quickly crunch vast quantities of numbers efficiently. Click to continue

Kevin Bauer

Member since April 24, 2017
As a mathematician, Kevin is passionate about challenging algorithmic problems. He is a persevering perfectionist and always tries to come up with elegant, efficient solutions. Analytic thinking and logic reasoning are among his strongest suits, and he enjoys writing code that involves out-of-the-box thinking. Click to continue

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

Divye Kapoor

Member since April 15, 2017
Divye is a very strong, in the top 0.1%, infrastructure engineer with working experience at Google and LinkedIn. He has a Master of Technology in computer science from the Indian Institute of Technology where he was also a silver medalist and the computer science branch valedictorian. Click to continue

Dave Poirier

Member since August 15, 2017
Since 2010, Dave has been working full-time as an iOS developer in Objective-C and Swift. He also has 20 years of experience in software development specializing in Assembly (Intel) and C. Throughout the years, he's had the opportunity to work on many software development projects in a myriad of software languages. Click to continue
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Testimonials
“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
“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
“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
“Dario was recently assigned to our company in order to help with PHP and JW Video player refinements. He listens extremely well and offers common sense suggestions that save both time and money. He speeds up the process by asking great questions, and he just delivered our first project on time. His redesigned player offers a very pleasing appearance and delivers functions that are both elegant and intuitive.”
Dennis B. Jacobs
President @ College TV Ticket
“Toptal makes finding qualified engineers a breeze. We needed an experienced ASP.NET MVC architect to guide the development of our start-up app, and Toptal had three great candidates for us in less than a week. After making our selection, the engineer was online immediately and hit the ground running. It was so much faster and easier than having to discover and vet candidates ourselves.”
Jeff Kelly
Co-Founder @ Concerted Solutions
“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
“One of our 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 applications, interview and test the applicants' capabilities, 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, and hire with a risk-free trial -- much faster, a lot easier, and with incredible results.”
Catalin S. Balaci
Owner @ EvoBits Information Technology SRL
“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
“We struggled for weeks to find a developer or architect with expertise in a niche API, but to no avail. When we linked up with Toptal, they connected us with the very expert we needed, and a week later we were hard at work making progress! The whole process was very smooth and we ended up with a new feature we couldn't have done without Toptal.”
Thomas Honeyman
COO @ FindMySong
“Andrea is doing an amazing job. I don't think we could have gotten a better person. He is fun to work with, he thinks out of the box, and he is extremely knowledgeable in what he is going. He not only does an excellent job, he also helps our company to differentiate our business model further (e.g. making our app offline-capable). I would recommend Andrea as well as Toptal any time to any friend.”
Pascal Girardat
Co-Founder / CEO @ Lifestage Solutions AG
“With the pressure on and millions watching the Cleveland Cavaliers during the NBA Playoffs, Toptal delivered the talent and expertise needed to launch a brand new fan engagement platform.”
Conor Kenney
Director of Professional Services @ Cleveland Cavaliers
“Working with Marcin is a joy. He is competent, professional, flexible, and extremely quick to understand what is required and how to implement it. ”
André Fischer
CTO @ POSTIFY
“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
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