Certainly I would intend to. In all cases would need to be flexible, part time or only a portion of the year, at my discretion, in an area of interest and be for a cause I believed in or for decent pay (or for both).
First would be out of interest and/or for voluntary/charitable reasons. Some of which might be paid a bit or be a win/win like volunteer at this sporting event and get free tickets, that would be great, it could also be unpaid.
Secondly part time or occasional work would be a 'middle ground' to full FIRE for me, because while I have a sensible FIRE point in mind I don't know exactly what my future plans are, so having flexible income to cover some/most of my minimum living costs would put me in a great position should my future costs be higher (may turn out that the income is not needed, in which case I can give more to charity). That could be e.g. English tutor (if, as is possible, I move out of UK. That would be say x hours a week every week), or as a different approach IT contracting (getting hired on an x months contract for an IT project, earning good money per day, rather than being a freelancer who has to chase work all the time. Obviously that's closer to normal full time work, but I would be in a position to say "no" at any point, be selective about the employer, work and conditions, and would not be doing it full time for years on end. e.g. working for 6 months and putting max contributions into pension etc. could add 3 years of minimum living costs to total investments).