Find a small company to work for. There are a lot around and many are hiring. You may take a pay cut (or maybe not), but the QOL is so much higher at well-run small company than any big company could achieve. The work impact feels much higher when you're not just one tiny cog in an enormous machine.
Seems to me you moved to London to race rats and watch dogs eat dogs and that has been accomplished.
You have made respectable gains and come out ahead numerically/financially and there are certain winnings to be had staying in the race.
In the process you have become a financial professional based on your computer science ability.
Where naturally financial success is everything and upside is more important than in most alternative endeavors.
With a keen focus for upside potential, you have forged a lucrative path but this has taken you far from the mainstream where almost all other professions do not have nearly that kind of focus.
In co-operation with your partner you could maybe relax your focus a bit in a way determined to broaden your horizons at the same time.
Bring other pathways into your field of vision and just see how they look, those closest to where you are now will be the clearest but over time you may see great distances in completely new directions.
One thing to think about with pure financial operations is there is so much money there because it's wealth that has been previously created then accumulated over a period of time. In London I expect you are handling lots of wealth that was created long before anyone living was even born.
With a good nose for the upside, one close alternative application might be to migrate to a position where most or all of your energies are employed or available for creating new wealth in your own lifetime. People do love it. A slight change like that can even make for a whole new outlook.
In the long run you may not always be a financial professional anyway and there are so many other types of success. You don't have to keep it going forever, there are so many other professions if you choose, but looks like you will always be a computer scientist of high caliber.
I mean is it meaningless? Maybe you don't like it which is find, but I find the purity of the work to be refreshing: make money no bs lies about "making the world a better place."
