I joined AdTech just a few years after graduation (my formative years as a software engineer) and that gave me the opportunity to work on very high throughput s

I joined AdTech just a few years after graduation (my formative years as a software engineer) and that gave me the opportunity to work on very high throughput systems. Eventually I got to lead several different project like building ad servers and real time bidder from scratch and scale them to the 100K+ requests per second while maintaining single digit ms avg response times. I also had a head start in the "big" data space because of AdTech. I will always be thankful for the knowledge I got because of the nature of AdTech, it positioned me really well in the market and just made me a much better engineer. After 5+ years working in AdTech is was time for a change, I was feeling dragged down by similar reasons, I had a high leadership position and a lot of domain knowledge so a lot to lose, but I made a change to mobile F2P gaming and have been doing that for over 3 years, it's been a great change.