Ask HN: When to disclose shameful felony during interview process?

As someone with a very strong software background and a recent felony, I'm wondering what your advice is in securing a local tech job. When should I tell interviewers? Is it even possible to get a tech job ever again? The last person I interviewed with canceled my second interview because she found out about this through google, and suggested maybe I look into contracting, but that sounds just as unlikely because of how easy it is to google me. Should I tell interviewers during the first introductory 30 minute phone call? Would this kind of red flag completely stop you from hiring someone who otherwise seems very qualified? What would make you more likely to keep moving forward with them?