Solo PLC/HMI/Safety Dev on high-value machinery as an apprentice — Am I being underpaid? Sanity check requested.

Hi everyone, I’m looking for a realistic sanity check from fellow automation and controls engineers on my current situation.

I’m officially hired as an Engineering Apprentice (I hold a M.Sc. in Engineering) in a large multinational company (3,000+ employees). On paper, I'm a junior in training earning around 30K€, though a chunk of that is paid via random "one-off" bonuses every few months rather than a solid base pay.

In reality, my daily work looks completely different. I just designed and wrote 100% of the PLC and HMI software from scratch for custom high-spec industrial machinery destined for a top-tier automotive OEM client (like McLaren). On top of that, I designed and integrated the entire Safety PLC architecture completely on my own, including all E-stops, light curtains, STO, and safety zone logic.

Right now, I'm out on the shop floor leading the commissioning solo. I'm doing I/O checks, testing pneumatic sequences, debugging hardware, and directly coordinating the electricians, mechanics, and process engineers on-site. Just recently, I had to put my foot down against a process engineer who wanted to pressurize a furnace lift mechanism right away—I refused until I could dry-test all interlocks to prevent a major mechanical crash.

The catch in all of this? I have zero mentorship. No senior engineer or tutor is physically shadowing me or guiding me during commissioning. Aside from maybe getting a bit of support later on for fine-tuning complex servo motion/axes, the delivery of this entire machine rests on my shoulders.

I'd love to get your perspective on a few things:
Is it normal in your region to let an apprentice write the Safety architecture and lead commissioning entirely solo on high-value projects? Given that I'm managing PLC, HMI, Safety, and field coordination on my own, what salary band or role should I realistically target on the open market? And finally, how would you recommend leveraging a successfully delivered project like this for my next career move once FAT is wrapped up?

Thanks in advance for any insights!