I was reminded of this story after reading another 'Looking for a Story' post, in which the MC may be over weight, and I think Leslie Moore's "Copy. Cure." may have been the front runner

Here is what I remember

I think the story is incomplete!

Set in future
May be Dystopian earth? (BladeRunner overtones)
Ruled by Corporations

MC is an (overweight?) hacker, (Female Persona Online?)
built a mainframe from obsolete hardware
Goes out to collect a replacement part,
has a meal at a street cafe, while waiting for contact

I believe there may be some kind of cyber interface, like in the 'Johnny Mnemonic' movie

MC is hired for a high level hack, and is in 2 minds whether to take contract
Contract turns out to be a Goldilocks trap

MC and the Corporate Fixer (I can't think of a better term) switch bodies via the net

I have some other fragments that may or may not be parts of this story so I'll leave those out