If you are an engineer and thinking about joining to a startup, be careful. There are some people who want a good product very quickly but there is no money for buying tools/instruments, paying the employees, etc. So you can make their product with own tools (if you have) for student's wage. Who only hold out if the company become successful and a lot of other condition you may get a lot of money... They only want developers cheap. (search for cliffing and vesting, don't tust anybody)

"Hire slow and fire fast." That is a very bad attitude, DO NOT work width such person (they make a horrible mood in the workplace)! (search for "valve handbook for new employees" and watch Simon Sinek talks at ted.com)

There is very litthe chance to a startup became the next google/facebook/etc. (Search for "first engineer at startup" it may not as good as it first appears)