I watched the 30 second video, and they mention that there is no collaboration (by design). Does anyone know of a site that does have collaboration? My situati

I watched the 30 second video, and they mention that there is no collaboration (by design). Does anyone know of a site that does have collaboration? My situation is that I'm getting back into contracting after being at an office job for 4 years. I'm updating my Upwork profile, getting my resume and portfolio together, all the things. But when I look at my recommended jobs, I get this sinking feeling like I'm working in a vacuum. I'd prefer something that works line an online shared workspace, where I'd go in, say "hey I'm a backend PHP/Laravel and iOS/Android developer, does someone need help for a few hours or days for around 50 bucks an hour?" and someone would ping me with an offer and we'd get right to work solving their problem. I also very much needed this when I couldn't find an answer on Stack Overflow. I've looked at https://www.codementor.io https://www.codementor.io but can't tell if that's what they're going for or how much friction is involved.