CodeSignal, formerly CodeFights, is a technical interview practice and skills-based recruiting platform operated by American company BrainFights, Inc, whose mission is to discover, develop and promote technical talent.

CodeSignal is a fun way to practice programming. Prepare for technical interviews & level up your coding skills. Join our growing community of engineers!

CodeSignal was founded in 2014, by Tigran Sloyan, Aram Shatakhtsyan, and Felix Desroches. The company is based in San Francisco, California.

CodeSignal applies core game mechanics to transform practicing skills like programming into a fun and addictive game while helping talented people from all backgrounds to find amazing new opportunities.

CodeSignal originally launched as an online community where developers can practice their skills through a series of Head-to-Head coding challenges, which appealed to competitive programmers. The main goal was to help developers build their coding skills by solving and discussing programming challenges with other developers on the platform.


CodeSignal is backed by top Venture firms including SV Angel,, Correlation Ventures, Social Starts among others.


CodeSignal customers include Evernote, Uber, Thumbtack, Dropbox, Asana, Wizeline and Quora. It supports 38 different coding languages on its platform.



  • Year founded: 2014
  • Funding Info: $12.5M in 3 funding rounds (Last funding type: Series A)
  • Yearly Revenue: $2M-$5M (2017)
  • Employee Size: 11-50
  • Business Valuation: Undisclosed
  • City/Town: San Francisco
  • State: California
  • Country: United States
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