What is the salary of HFT engineer?

Excuse me, could you please clarify what the salary range might be for a High-Frequency Trading (HFT) engineer? I'm particularly interested in understanding how the compensation for such a specialized role within the financial technology and cryptocurrency sectors might vary, taking into account factors such as experience level, skill set, and the current market demand. Additionally, are there any industry benchmarks or surveys that can provide a more accurate estimate of the salary expectations for HFT engineers?