18 years helping Irish businesses
choose better software

Codility
What Is Codility?
Codility is a remote hiring platform for engineering teams. They use our platform to predict the real-life skills of their technical candidates at all stages of the hiring process, via unbiased and relevant assessments on CodeCheck, live technical interviews on CodeLive, and virtual recruitment events with CodeEvent - all remotely and at scale. This brings faster hiring, time savings, and gives engineers more time to solve problems that matter.
Who Uses Codility?
Recruiters, Hiring Managers, Interviewers, and Engineering Leaders who can benefit from a remote hiring platform that evaluates real-life skills, at scale.
Not sure about Codility?
Compare with a popular alternative

Codility
Reviews of Codility

Alternatives Considered:
A great developer assessment tool
Comments: Codility has helped me improve my skills as a developer and as an employer, I use Codility to frequently keep my staff sharp on the job by frequently testing their capabilities.
Pros:
I have used Codility as a developer as well as an employer and I can tell you that it is a great assesment tool. One of Codility's key advantages is that it enables employers to quickly and effectively assess the coding abilities of numerous job applicants. Candidates can work at their own pace through the online coding tasks on the user-friendly website.As a developer, I use Codility to assess my coding abilities and learn new programming paradigms in the process.
Cons:
Some of the things which I would like them to work on is an offline mode. The complete dependence on the internet may limit some users from enjoying its features. They should also make it such that tests are optionally timed, many times, developers are not able to complete the tasks within the short timeframe.
Codility’s Strengths and Areas for Improvement
Comments: Codility helps bridge the challenge of assessing coding skills on objective and efficient grounds. For me, it's like a mentor, which initiates you to first of all think as a software engineer would, maximize your codes, and be considerate of the edge cases in real-world conditions. Providing problems that are similar to those you might encounter in a job interview or while trying to solve especially complex coding problems on the job makes the process of preparing for technical interviews much easier.
Pros:
I recently attempted Codility. Honestly, I would say it was some mix of both challenge and insight. The platform is quite well designed with a smooth interface to coding, clear problem statements, and real-time feedback about performance.
Cons:
Probably, one of the issues with Codility is that the tests can sometimes appear a little too edged on the edge cases. I think it might be frustrating for developers more accustomed to solving practical, everyday problems. In some cases, very severe time limitations and scoring systems really add unnecessary stress on candidates. Instead of exploring creative solutions, candidates focus more on trying to get a qualifying score.
Alternatives Considered:
Not an adequate test for most engineering roles.
Comments: If you use it, I would suggest the live-code feature where you screenshare and watch the applicant solve one larger problem, preferably one that relates to the job at hand rather than a mensa puzzle. Make sure to review the failing submissions because in many cases, they had it right, but the machine graded them wrong, this could be for many reasons including the structure of the training set they were given was different from that of the testing data. Over half of what our engineers do is debug, interpret existing code, and build infrastructure. None of these things are tested with Codility. If they do pass, they are proficient in at least one element of the job, but not necessarily the rest. I interview any applicant who passes with 30% and always look at their code even if it failed.
Pros:
It is deployable and easier for HR who don't understand code themselves. The ability to compare to other programmers' skills is nifty.
Cons:
Many of the problems are not completely presented (I.E. there are other factors that are not mentioned which would influence the code, so applicants who submit overly-thorough code will actually fail because the machine didn't like their answer.. it is a guessing game) 20 minute time limits to solve an algorithm problem are NEVER the case in real life. Programmers do not work off memory, they work off documentation-- codility does not test on use of frameworks or libraries, only math concepts. The IDE is limited, will delete the applicant's code if they switch languages momentarily.
Codility Response
3 years ago
Dear Mark, thank you very much for your feedback! We are sorry to hear that your experience with Codility didn't meet your expectations. We'll strive to do better in the future! Algorithmic tasks are only a small part of our task library. We also offer a lot of real-life tasks, including the ones where candidates need to fix the bugs in existing code or rewrite the code to improve the application performance. Moreover, our Partnered Tasks service allows you to add your own real-life tasks to our platform. If you're interested in learning more about all sorts of tasks we offer to our customers, please reach out to [email protected]. We'd also be happy to hear more about what kind of tasks or technologies are missing in our library, so we can add them ASAP. Your friends at Codility
My Codility
Comments: First time I used Codility 8-9 month ago in my interview. It was Microsoft interview. Scince that time I some times I join Codility and interested Codility questions.
Pros:
It's easy of use and I can reach evey old questions easily because questions listed near by near. And I can connect to start time for taking my test again if time is already expired. And resolving time period for every test questions is long, in 1-2 month every body can connect and resolve problem and earn certificate for every resolving problems.
Cons:
For every problems I trying use my computer idea before adding my code to Codility because it apsent idea feature, ex. autocomplete. And I do my test cases by myself(It's a bit takes time ) in my idea. I would like Codility before give the several tests cases which users can copy to add their idea.
Codility does the hard work for the recruiting team
Pros:
Codility offers a lot of features that can help it's users for developing their recruitment system faster. Codility is also a great tool for the job seeker as they can practice the latest interview skills here.
Cons:
I didn't find any disadvantages related to this one.