System seems down. No matter which programming language I choose JS or python, no matter how simple the code is, even a simple "print("hello!")", when I hit the run code button, I always got "execu... See more
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Overall, good product. A few things can improve: 1) More coding tutorials including videos or white papers, particular aiming to the "hard" problems. This can really help to upgrade job seeker's co... See more
Internet search is barely functional. Test cases fails most of the time even if the code works properly. The text editor its completely useless. The only good features is that RRHH do nothing and stil... See more
Even though my solution yields the exact same result show in the test examples (I even used a text diff tool to double check), Coderbyte consistently may response as incorrect. I've never had su... See more
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System seems down.
System seems down.
No matter which programming language I choose JS or python, no matter how simple the code is, even a simple "print("hello!")", when I hit the run code button, I always got "execution timeout" response
Worst Online Assessment site ever!
When trying out custom assessment that site is buggy. Gave false positives on cheating and reported submissions twice.
World's worst coding test platform
Coderbyte is hands-down the worst coding test platform in the world. It causes employers to lose the best candidates.
It tests candidates' ability to survive a completely broken development environment instead of actual coding ability. It pushes candidates to the point of total exasperation so they throw in the towel.
It is absolutely riddled with bugs and barely even works at all.
Bugs include:
* Built-in web browser is buggy and borderline unusable
* Auto-competition intermittently broken
* Zero auto completion for imported libraries
* Intermittently shows previous code output instead of current output
Use Coderbyte if you want to drive away your best candidates! Using Coderbyte screams to job applicants "This employer sucks! Go away and get a job elsewhere!".
Internet search is barely functional
Internet search is barely functional. Test cases fails most of the time even if the code works properly. The text editor its completely useless. The only good features is that RRHH do nothing and still has their works done - how convenient
Assignments are filled with bugs
Many of the assignments do not work, where even if the candidate solved the task correctly, the platform still says that they failed.
Like using a “Rubix Cube” to assess a Salesman
Just my experience. I selected “react-native” and this is what I got.
1) React Native hasn't been JavaScript-first in years. Most modern React Native codebases use TypeScript by default. Even legacy JS-based projects have long since adopted ES6 modules, not CommonJS, which was deprecated ages ago. The test felt like it was pulled from a tutorial circa 2014. The tech stack was outdated by nearly a decade and not representative of how React Native is built or written today.
2) I literally had to use Chrome DevTools to debug your own test harness. The embedded console crashed multiple times, and I had to patch around it just to get a working environment. That shouldn't be necessary during a skills assessment.
3) Despite completing the task correctly—and ahead of time—the system flagged the result as invalid or non-compliant, with zero explanation. I wish I’d recorded the session, because from my side, everything was above board.
4) Even if the test environment had worked, the content itself was entry-level and overly focused on syntax minutiae. It’s like asking a senior software engineer to prove their experience by solving a freshman-year programming quiz from memory, without documentation, in a broken IDE. Yes, we can do it. But why would we? It’s not a valid measure of real-world capability.
Solution yields correct output (character by character), and still is marked as incorrect
Even though my solution yields the exact same result show in the test examples (I even used a text diff tool to double check), Coderbyte consistently may response as incorrect.
I've never had such a flabbergasting experience with a code challenge website (which are mostly bad anyways).
LeetCode is the benchmark for me.

Reply from Coderbyte
STAY AWAY FROM CODERBYTE!
I had signed up for a 14 day trial period, to analyze on the online assessment that we had planned for our company's recruitment process.
The platform doesn't have the image proctering functionality. The reports analyzed shows the suspicious activity, left tab/click press events, etc. All fine.
Post the trial ended, we got only 1 reminder stating to make the payment; mind it that it doesn't mention that the credit card information we had attached, was failing. Our trial ended on 18th Feb and we got an email on 19th Feb.
We tried logging in couple of times but unable to do so. I tried submitting the query on 20th Feb through their form form linked in their website
I submitted my query as shown below:
------------------
Unable to login to my account. I tried resetting the password but I do not receive any email.
Please help as we need to make the payment and resume the hiring at our end.
Thanks!
-----------
Post which I received below response from "Daniel Borowski, CEO":
-------------------
The account was flagged and then deleted because this was the second time the payment failed.
-----------------
I replied stating:
------------------
Hey Daniel,
Please propose the solution also rather than just stating the problem and putting an end to the conversation.
Plus, it's disappointing to see such a harsh policy of deleting the account if the e-payment is not made. Take it as a suggestion but this won't keep your customers happy if such incidents take place in the future..
Thanks!
-----------------
To which, he responded:
-----------------
Feel free to sign up again with a valid credit card!
------------------
Blunt and arrogant responses from their CEO. Terribly policies of deleting the accounts where we had created our own custom assessments, had our test assessment reports of candidates, etc. All lost.
STAY AWAY FROM CODERBYTE!
its just a piece of trash complier not…
its just a piece of trash complier not working not fetching the data correctly from apis just a hell
Overpriced, vengeful CEO
Overpriced, broken trial, vengeful emails.
1. "Trial period" involves a $200 charge. Had to argue with support to get money back.
2. "Trial period" only involves 5 emails sent, even if you send it to yourself to test it support will rudely refuse to grant you any additional credits.
3. Incredibly overpriced. Starts at $200 a month ... or $15 per candidate test sent...
Here is the response from their CEO.. copy/pasted:
"
Instead of asking for more invites during trial, you cancelled and left a review on TrustPilot?
We would have happily increased your trial limit if you for some reason couldn't simply start the subscription.
Anyway, good luck with another tool and I'm glad you'll never waste my time again as a customer.
"
CEO sent this email in response to this review, after ignoring our previous email :/
My exp Excellent Learning Experience on Coderbyteerience was excellent and very…
My experience was excellent and very satisfactory. I didn't encounter any problems while practicing. The challenges were well-structured and very helpful. The platform is user-friendly, and I was able to improve my skills significantly. I would highly recommend Coderbyte to any developer looking to enhance their coding abilities.
I lost access to my organizational…
I lost access to my organizational account and have contacted support multiple times with no response. I even tried booking a sales call, but received no follow-up. It feels like I've been completely ignored.
Testing Bugs !!
The testing of the implemented solutions on CoderByte consistently yields incorrect results. After completing the implementation and clicking "submit," the code is subjected to 10 tests, which ultimately award points based on whether the test passed or not. However, the same code (without even the slightest modification) can produce varying results when subjected to testing again, leading to different final scores (excluding speed points). This is highly problematic, especially considering that many companies use the CoderByte platform for evaluating IT candidates.
This inconsistency in test results undermines the reliability of CoderByte as an assessment tool and can potentially lead to inaccurate evaluations of candidates' coding skills. It is crucial for such platforms to provide consistent and dependable results to ensure a fair and effective evaluation process for both candidates and hiring companies.
the codes were very challenging
At the moment of writing this review…
At the moment of writing this review Coderbyte is broken. It will detect ALL the test cases as wrong, even though the output matches exactly what the test case expects.
Aim intelligene
Aim intelligence IS most important for New Comes like me 🌍
A very reliable place for developers
Things to improve
This is a mail I sent few days ago.
Hi,
My name is Tamir and I'm from Israel.
Recenlly I subscibed to your site.
I use it to practice my skils in python.
First I can say that it is a very good idea, and I think it help me in achiving my goal.
Never the less, I can't ignore that there are some very severe issues that must be attended.
1. After subscribing got pop up for a better price offer (not that critical but damage my feeling)
2. On one of the challenge I took, by mistake I submited the code. It was not ready and had some
syntax errors. Still I received from the site congratulations for completing medium task in less then 4 minutes (or 7 not sure) undecided
3. Today I done some very nice challenge, after completion I wanted to look at some of the other solutions (this is a very strong add on).
But then I saw a solution with 10 points score that is a wrong solution. Now I think that it something that shouldn't happen.
I know you have set of (10) test case so I cant understand how it happen.
I enjoy this site so much. . . worth every penny.
I wake up every day and do one challenge and can't imagine a better way to start the day.
So much of my daily work life is software management or chasing ghosts in the machine(s). It is such a treat to have a pure coding experience once a day.
And I love comparing my answers to to the others. Such an amazing (and educational) experience to see how different brains approach the same problem.
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