This mirrors my experience with my prestigious job I had at SiemensVDO in 2005/2006. Same stuff of wasting time on anything else than coding. He said 10% of his time was coding. I suspect mine was like 20% and I felt miserable after a year. The honeymoon of getting to write embedded code for real cars, cars that would be driven by millions of people only lasted like 3 to 4 months. After that the job had nothing else to teach me and over a little year later I quit too, with a total of one month shy of 1.5 years there.