Challenge yourself to code and interview better.

Coderbyte is the #1 platform for 800,000+ developers that want to take their careers to the next level.

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Featured in the best developer communities

Use this and you will improve and gain confidence. This applies even if you are already a programmer. The training videos are really high quality.
— Luke Maxwell
I love Coderbyte because it had one of the most simple and intuitive UX's. I loved the instant feedback, being able to see my ranking, as well as other users' solutions.
— David He
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The only coding challenge platform with everything software developers need to go from novice to pro.

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Improve your coding

  • .Algorithm, front-end, back-end, and database challenges
  • .Automated grading and the only platform with Big-O analysis
  • .Over 3 million solutions you can learn from

Ace your interviews

  • .Real-world interview kits to help you prepare
  • .Expert videos and solutions by our team
  • .Career resources and partners

Most popular code challenges

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Bracket Matcher →
Medium - 120,000+ solutions

Have the function BracketMatcher(str) take the str parameter being passed and return 1 if the brackets are correctly matched and each one is accounted...

Tree Constructor →
Medium - 11,000+ solutions

Have the function TreeConstructor(strArr) take the array of strings stored in strArr, which will contain pairs of integers in the following format: (i1,i2), where i1 represents...

Longest Word →
Easy - 140,000+ solutions

Have the function LongestWord(sen) take the sen parameter being passed and return the longest word in the string. If there are two or more words...

Questions Marks →
Easy - 23,000+ solutions

Have the function QuestionsMarks(str) take the str string parameter and check if there are exactly 3 question marks between every pair of two numbers that add up to 10...

Interview kits

Algorithms Interview Kit
5+ articles - 30+ challenges
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Google Interview Kit
10+ articles - 15+ challenges
Start coding →
React Interview Kit
6+ challenges
Start coding →

Starter courses

Learn Algorithms in One Week
8+ videos - 10+ challenges
view course →
Learn JavaScript in One Week
10+ videos - 10+ challenges
view course →
Learn Python in One Week
9 videos - 12 challenges - 2 articles
view course →
Learn Ruby in One Week
9 videos - 12 challenges - 2 articles
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Featured career resources

Outco
Coding & soft skill interview coaching

Outco coaches software engineers on technical and communication skills that help accelerate their job search and advance their careers.

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Moonchaser
1-1 Salary Negotiation Support

Get paid more. Moonchaser has negotiated hundreds of tech offers. Get 1-1 guidance from their experienced team of ex-FAANG PMs, SWEs, and Recruiters.

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Workback
Mid-Career Internships

Receive offers for mid career internships at amazing companies. Get short but meaningful work experiences while growing your professional network.

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Coderbyte YouTube
Technical interviewing videos

Learn about algorithms, data structures, and how to solve interview questions from companies like Google, Facebook, and Microsoft.

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