He's also cofounded 2 VC-backed startups:

• SearchEye, a brand signals marketplace, which he bootstrapped to $2M in AR, and raise $800K seed round in 2023.
• SportHold, sports prediction, 500 Startups Batch 9 in Mountain View.

Christian was also Head of Growth at Gigster (YCS15), as the #4 employees with 6 weeks before YC demo day. In those 6 weeks we grew revenue from $300K per month to $1.6M per month, leading to a $10M Series A by A16Z.