Tech companies don't show profits as long as there's place for development. They're still paying tax on everything else, including renting offices, paying salaries and bonuses etc.
> paying salaries Isn't that a tax paid by the employee, not employer? Starbucks tried to say that they paid a lot in VAT, but that's a tax paid by the customer not the business.
However, there is also employers NI which is definitely paid by the employer, at 13.8% over a low threshold.