"Most companies won't have a problem with that, but some might" Always read your contracts and look for clauses regarding this. Most companies require you to d

"Most companies won't have a problem with that, but some might" Always read your contracts and look for clauses regarding this. Most companies require you to disclose the fact that you work for another company / are doing contract work outside of your normal work time. Some companies forbid this (unless you ask them to change the contract, and if you explain the situation, many companies will oblige).