A learning-first approach

^1000to cracking the ^500coding interview ^2500

to ^200getting ^200a six-figure ^100 technology job ^2000

Firecode.io uses learning algorithms and curated coding interview questions to help you land your next dream tech job.

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Revolutionizing Coding Interview Preparation

Cloud Coding

A beautiful online IDE with a friendly social user experience - we believe coding interview preparation should be fun!

400+ Interview Questions

Make the most of your practice with over 400 curated problems and answers from real coding interviews at the best tech companies.

Smart Practice

Learning and memory algorithms adapt to your skill and pick the most relevant interview questions for you to solve and master.

Social Learning

Prepare for the coding interview with a large community of like minded users - comment on and discuss solutions and best practices.

Best Solutions

With community voting and participation, Solution OverflowTM ensures that the best answers make it to the top!

Get Rewarded

Rise to the top with awards for each coding interview question. Challenge your friends and learn with them!

Focus on the Problems


Save time with Pre-Coded Abstract Data Types, APIs and helper functions

With key APIs and Data Structures provided out of the box - you can focus on the algorithm and coding constructs instead of spending valuable time coding the scaffolding.

Less Googling, More Coding with FiredocsTM

Want to check the class methods of a HashMap? Unfamiliar with a method signature? Firecode.io has you covered - with a Real-Feel Smart IDE that lets you quickly check key classes and constructs.

Use SharepadTM for Technical Phone Screens and Collaborative Coding

Companies love SharepadTM for their technical phone screens.

An online Real-Time Collaborative editor that is truly a class apart. Upload your company's logo, set a problem title and invite an unlimited number of collaborators and viewers to your session.

Replay the code written in the editor. With TimeMachine, interviewers can identify and judge coding behavior and style. SharepadTM supports over 50 coding languages.

Sharepad - Powered by Firecode.io

Interview Ninja in 4 steps

Join Firecode.io

Join Firecode.io

Have a coding interview coming up? Want to level up your coding skills? Rusty with algorithms and data structures? Join for free!

Choose Programming Language

Choose Programming Language

Three of the most popular coding interview languages - C, Java and Python are available at launch. Ruby, Javascript and Go will be added soon!

Calibrate Firecode.io Level


Answer a few simple questions to calibrate your starting level and personalize your learning track. Firecode.io adapts to your skill level.

Start Learning with Firecode.io

Start learning

Prepare for your coding interview with Firecode.io's learning engine and carefully curated interview questions.

You're in Good Company


Top 10 Startups in Education and Kids


Top 10 Most Popular Startups of Jan 2016


Web Summit Alpha Class of 2015

Our users Firecode.io

Datt Goswami

"I have been using Leetcode, GeeksforGeeks, Careercup & Hackerrank, but this is the most useful and fun way to learn / program. It is similar to actual interviews that I gave using Collabedit at PlaceIQ, Zocdoc, Google was in Google Docs, Amazon in Hackerrank. Great work!"

- Datt Goswami

Software Developer - AvMet Applications, Inc
 @dattgoswami     LinkedIn
Avemt Applications Inc.
Brandon Giraldo

"Really loving this application! With this I get the coding review I need for software engineering interviews. I found it extremely helpful in reviewing many major data structures and algorithms. It's been an amazing companion and found it very helpful and engaging. With a nice UI, great explanations on complex topics, and being able to run code in the browser, I really recommend this app to anyone looking to prep for coding interviews. Love it!"

- Brandon Giraldo

Cornell University - B.S Information Science
 brandongiraldo.com     @BrandonGiraldo     Facebook
Cornell University
Dharmin Majmudar

"An app like this has been long due. I loved the user experience, test cases and tips on solving difficult interview problems. My Java skills definitely improved - this should help developers everywhere."

- Dharmin Majmudar

Texas Tech University - Computer Science
Tripadvisor - Software Engineer II - Palo Alto, CA
Ayush Chaudhary

"Firecode.io helped me crack the coding interview at some of my favorite companies! Being an ECE major, I started with solving Fibonacci and evenutally was able to solve some of the hardest problems!"

- Ayush Chaudhary

University of Southern California - M.S. EE
Intel - Software Engineer - Phoenix, AZ
Intel Corporation