I'm not even sure what exactly counts as a "techno thriller" but you might enjoy:

Zer0es: https://www.amazon.com/Zeroes-Chuck-Wendig/dp/0062413171

Zero Sum Game: https://www.amazon.com/Zero-Sum-Game-Russell-Book-ebook/dp/B...

Null Set: https://www.amazon.com/gp/product/B07GVD5T4M/

The Shockwave Rider: https://www.amazon.com/Shockwave-Rider-John-Brunner/dp/03454...