Answered on Sep 19th, 2017 at 10:34 AM
If you sue the company here, you will have to come here for the trial, if there is one. Most cases settled. The other side can also force you to come out here for your deposition and for a mediation or settlement conference. We can ask the other side to do your deposition by phone, but they don't have to agree.
Another strategy would be to sue them in Canada. That's where you did the work, and that's where they paid you. They probably will not defend. You'll get a judgment. Then I can try to get a local court here to enforce the judgment. The other side will object that it should have been sued here. However, if you win, then you will have avoided all of the expense of actually litigating the case, including traveling here for your deposition, a mediation or settlement conference, and the actual trial.
Do you have a written contract with the California company? Does it say that California law will control or that disputes must be decided in California? If so, then your chances of getting a California court to enforce the Canadian judgment will be less than 50%.