"you have a PM screaming at your engineers" - and there lies your problem.
I'm the sole engineer for a distinctly non-engineering company (we deliver food, and I'm the only person with any sort of engineering background).
However, we work in a very similar way to GitHub. We have a motivated team who love our product - and that rubs off on our working practices. No one is ever told they have to work late, or they have to hit a deadline, but things get done at an amazing pace. At some point soon I'll be working on an internal CRM system, but because I care about the company, and the impact it will have on everyone else's ability to do good things I'm excited about that.
I'm the sole engineer for a distinctly non-engineering company (we deliver food, and I'm the only person with any sort of engineering background).
However, we work in a very similar way to GitHub. We have a motivated team who love our product - and that rubs off on our working practices. No one is ever told they have to work late, or they have to hit a deadline, but things get done at an amazing pace. At some point soon I'll be working on an internal CRM system, but because I care about the company, and the impact it will have on everyone else's ability to do good things I'm excited about that.