Conspiracy to distribute a schedule 3 is breaking the law but it is not up there with dealing herion. Plead out with no jail time would have a minimal impact many people. But it went down as a felony.
A felony is going to hit harder in some professions. For example law, medicine, and IT. Reason for IT sensitivity is you have assess to data.
If they ask you need to tell them. Even if they don't ask maybe you should tell them. A friend of mine had a DUI and the new employer did not ask but when they tried to put her on the insurance policy the DUI came up and she was dismissed.
Look for stuff that stays away from enterprise data as that is going to be very protected.
Not rally Java but games. But working in games is brutal. Look for stand alone apps.