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Matt Greensmith

Toolsmith, infrastructure developer, operations engineer, linux sysadmin.

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Coding Challenge

Take the Challenge!


  1. Mike Darke (@mikedarke) - September 30th, 2015


The SaaS QA company Rainforest used to use a little coding challenge (still available at as an initial hiring filter for technical candidates. They provided a secret application email address at the end of the challenge.

I enjoyed their little test so much that I was inspired to create my own little coding challenge/puzzle. It remains unsolved to date (although it’s only been available since June 2015). Your name could be at the top of the leaderboard! Huge congratulations to Mike Darke, the first person to solve this puzzle!

Solve the puzzle and have your name immortalized on the leaderboard for eternity!