I am a full-stack/product engineer and I am trying to build a portfolio based on real SaaS problems rather than creating more fictional side projects. What I would ideally like to do is work with a few early-stage SaaS products that already have users and contribute to something meaningful maybe a feature that's been sitting in the backlog, an AI integration, or a workflow that needs to be built. My goal is to eventually document the experience as a case study: Before → Problem → What was ...