I'm guessing probably most companies of at least couple thousand employees have software engs. The reason is that, with that scale there's a lot of business pro

I'm guessing probably most companies of at least couple thousand employees have software engs. The reason is that, with that scale there's a lot of business processes to automate and the company is probably unique enough to not have its needs fully served by available off-the-shelf software only. Hence, they need to write their own software too. Sometimes, they contract outside companies to write it for them, in which case the in-house SEs write specs, oversee the work, check the deliveries, run production etc.