The causality is backwards here. He achieved his position first, became the CTO of probably the most important Turkish tech company and then met Erdoğan's daughter.
It's probably inconceivable from a Western perspective.
Samo Burja has an interesting clip where he talks about the succession problem, and briefly mentions the Japanese practice of adopting someone by getting them to marry your daughter. He also talks about how this would not work in modern day America.
Yes, this truly doesn't tell anything about Turkey having very robust tech industry, and legions of very qualified engineers, many times the number of other countries their size.
Be him Erdo's in law, or not will not make any difference to Turkey having many other equally well performing heavy industry, and military hardware companies.
This is very distracting from the serious conversation when everybody keeps calling out one man's family status, having no bearing whatsoever on the wider industry as a whole, as a sole thing worth talking about Turkish industry.
Samo Burja has an interesting clip where he talks about the succession problem, and briefly mentions the Japanese practice of adopting someone by getting them to marry your daughter. He also talks about how this would not work in modern day America.
https://www.youtube.com/watch?v=NGPjhrV4G9c (last two minutes talks about Japan)