When we talk to our clients, we're a recruiting company which uses online challenges to a) source and b) pre-qualify very good engineering candidates.
When we talk to engineers, we're a company which makes fun engineering-y things you can do on the Internet. (Hack a stock exchange through it's REST API! Code a market maker! Buffer overrun a C program running on an AVR microprocessor to corrupt a FIX message to steal a billion dollars!) And we can also, potentially, introduce you to a job if that is interesting to you. Our estimation is approximately 95% of our users are not in the market for a job at this exact moment in time.
You can see the two-sided messaging on our website:
For companies: https://www.starfighters.io/approach
For engineers: https://www.starfighters.io/players