It's up to you, but it sounds like you would in large degree saving the company. That means you have a high value. But, what do you want? Do you want this job?

It's up to you, but it sounds like you would in large degree saving the company. That means you have a high value. But, what do you want? Do you want this job? If it wasn't interesting then, would it be interesting now? Are you between jobs, or would you be quitting a job to do this. I don't need the answers to those, just answer them for yourself. But, some extremes: boring work, no one else can save the company, you'd have to quit your job and work at this 14hrs/7days a week for 2 years. I'd suggest a very high daily rate, and a significant signing bonus to compensate for the risk of quitting a job you like plus the career stagnation this job entails. to be clear, 'very high' means, I dunno, 5x a normal rate, maybe much more. Whatever reflects the value you bring to them. I'd also probably negotiate something in terms of who your boss is and who makes decision. Do you really want to answer to a CIO that made those kinds of decisions? Probably not. So, autonomy, replace the CIO, or buckets of cash to compensate for risk. If you are not leading, make sure you trust whoever is, or the pain will just continue. Get that all in writing, and give yourself enough cushion to bail if that person bails after a few months. All this assumes you see a way out of their mess. If it can't be fixed? I'd run. Inverse: best opportunity of your lifetime, great enhancement to your skill sets, you are unemployed with no prospects. What are you waiting for, make a mid-level rate request and expect to get talked down a bit. But, you asked how I would handle it. I'd walk away without a second thought. Life is too short to suffer for other's bad mistakes, or to stall my career. Maybe if I could turn it into FU money then I'd do it, but other than that ... naw. Don't underestimate how a bad situation at work colors your entire life (at least for me, you may be different). But that is me.