codility.com
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Codility: The Gatekeeper of Code
How a 163-person team became the definitive screen for engineering talent
In a world drowning in resumes, Codility built the filter. They don't just test code; they validate the ability to think like an engineer, turning technical hiring from a gamble into a science.
"With 55% direct traffic, Codility isn't just a tool they find; it's a platform they rely on daily. It's the standard."
The Enterprise Moat
Codility isn't chasing the SMB market. With $25.4M in revenue from just 163 employees, they are laser-focused on the enterprise. Their product isn't a feature; it's infrastructure for companies like Amazon, Google, and American Express. The high direct traffic percentage proves their grip on the B2B market.
The SEO & Brand Paradox
It's a rare company that owns its brand name so completely that 'Codility' drives 15,000 monthly searches—10x more than 'codility test'. Yet, their organic search traffic sits at only 34%. This suggests a highly effective sales motion and word-of-mouth engine that outperforms their inbound SEO strategy. They are winning, but there's untapped potential in the broader 'technical assessment' keyword space.
The platform's tech stack—Swiper, Tailwind, Ant Design—reveals a modern, component-driven frontend. But the real differentiator is the human element: Neil Morelli, their Chief I-O Psychologist. Codility isn't just checking syntax; they are assessing cognitive fit, blending code with psychology to predict on-the-job performance.
- The 'CodeSignal' Effect: They operate in a hyper-competitive space but maintain a distinct focus on enterprise rigor over gamification.
- Trustpilot Paradox: A 2.4/5 rating on 7 reviews signals friction. Candidates often hate being tested, but companies love the results.
- Niche Dominance: Ranking for specific queries like 'gen ai theoretical knowledge codility test' shows they are adapting to cutting-edge tech trends faster than legacy players.
Codility is the Standard
They don't just measure code; they measure the engineer behind it. For VCs and founders, this is the benchmark of technical hiring infrastructure.
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Codility: Online Coding Tests & Technical Interviews
The #1 online coding test & interview platform for enterprises. Assess technical talent with valid skill-based assessments and interviews.
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Reviews (7)
Codility in Candidate Screening
Codility has been a steadfast tool in our candidate screening for almost a decade. While it has proven reliable, the evolving landscape, marked by the rise of tools like ChatGPT, suggests the need for some enhancements. Adapting to current trends and incorporating user feedback could further elevate Codility's effectiveness in candidate evaluation.
From an applicant perspective
From an applicant perspective, Codility is poorly designed. I have no doubt, from a recruiter perspective, it gives confidence. But it hides the randomness of the results. 1. It is not possible to test all the cases. They are hidden. Performance is evaluated only after you submitted the task. 2. The number of tasks is not indicated. You cannot manage your time properly as an applicant 3. You cannot come back to a previous task. Meaning, any spare cannot be used for a task you would like to improve Either you get a perfect score, or your score is immediately low, as you get no chance to correct the code.
The experience is great until you find…
The experience is great until you find out the score is not reliable: I used a built-in function in Java that did EXACTLY what was required in the description (that I read thoroughly). Codility gave it a score of 50% for correctness. Quite frustrating to be crossed off the candidate list just because of that.
Not great
The IDE is terrible, next to no intellisense, and what little there is often completes the wrong thing. The "problems" they present to do not give you enough information to complete the task fully and then they will mark you down on their "correctness" (Hidden test cases for the code). In the real world, you don't get given half the specifications for a project so not sure what their angle is on hiding all the test cases. The english on the tests is poorly written - questions often require multiple re-reads to even understand the sentence let alone the problem they want you to solve. Better platforms out there.
The platform can not be trusted
The platform can not be trusted. I took a coding assessment on Codility earlier this year, I found the platform to be flawed. For example, some multiple-choice questions didn’t allow selecting more than one answer, even when multiple selections were clearly required. Additionally, one of the provided dependency files had a formatting error that caused valid code to fail unit tests, and that file couldn’t be edited. I reached out to them about these issues, but they denied any problems, even though I had proof. With issues like these, it’s practically impossible to pass the test fairly. Just something to keep in mind when choosing a third party platform
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About codility.com
The #1 online coding test & interview platform for enterprises. Assess technical talent with valid skill-based assessments and interviews.
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codility.com uses 12 technologies across their website including HSTS, PHP, WordPress, and more.
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codility.com receives approximately 247.5K monthly visitors and ranks #160,870 globally. The website has a bounce rate of 39% with visitors viewing an average of 3.8 pages per visit. Users spend an average of 3:56 on the site.
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