I've come to learn that your salary as an engineer is more directly tied to your company's success rather than your personal outcomes as an engineer.
I've seen people padding buttons for £700/day working for large brands
I've seen people train open weight models for £350/day trying to ship an MVP.
The last permanent role I negotiated had a TC of £160,000/year. I'm open to go down to £90,000/year or even less for the right opportunity
As for contract work, my last 3 projects were £600/day, £700/day and £550/day. Again, I can go down for something stable.