My wife is a dual German/US citizen and will be conducting research under a grant funded by the French government in Paris for 9 months. I hope to be able to join her, but would need to work while there in order to support us. I am a US citizen working as a full-time freelancer/consultant with US clients. My work is remote and so in theory is not difficult to take with me anywhere, but I understand that the implications of working in Europe may mean double taxation or perhaps breaking the law. My intention is to operate legally, but it is difficult to find the proper path in terms of visa application, residency status, and tax status to make that happen. Does anybody have experience with a situation similar to this or perhaps knowledge of the proper path to follow?
As your wife is an EU citizen exercising treaty rights by working in another member state, you are entitled to an automatic carte de séjour de membre de la famille d un citoyen de l’union - which you need apply for within 3 months of your arrival in France.
It does however, normally take them 6-12 months to issue this so is unlikely you will receive it before you leave. But you can work from the day you arrive as is is an EU right.