If you are still hiring, I got this working some time ago. The implementation works according to your specs (Linux+GPU+NVIDIA CUDA). We can either:

• provide the source code for 10k
• provide a compiled binary for 5k
• generate the each of the addresses you need for a fee (not sure how much it would be, but we'll have to calculate it on prefix length, estimated computing time and real computing time)

Unfortunately, this was done for private use and the code base is pretty rudimentary, I would need to work it out a bit to deliver it without lots of hacks. Probably a weekend or two of work.

Do you have some kind of deadline or are you going to accept the approximate time that the developer tell you?

In the second case i can try to develop it, recently i am learning cuda to implement in my keyhunt project, but it can easily be tweak for yor purpose.

My keyhunt project in case that you don't know it: https://github.com/albertobsd/keyhunt#vanity-search

Regards!

-Implement private key generation: Implement a private key generation algorithm that is compatible with CUDA/OpenCL and can run in parallel on multiple GPUs.

-Implement a function to derive the corresponding Solana address from each private key.

-Implement a function to check if each generated address matches the desired vanity pattern.

-Parallelize the address generation and checking process to run on multiple GPUs.

-When a matching address is found, store the corresponding private key securely.

Added some clarity to your description, so people will understand more
Looks easy now.

Ps:
Note: Keep in mind that the private key must be stored securely to ensure the safety of any funds associated with the address. It is also recommended to use a reputable cryptography library to generate private keys and perform other cryptographic operations.

Btw, as Newbie member i can't sent DM's to you.

This user entered into an agreement to do this development and once funds were sent to escrow they decided to back out and not do the work.  This is resulting in a refund request for the buyer (OP) which I am going to process later today.  I wanted to post here in the event that a possible man in the middle scam could be occurring in the event that it can possibly help someone from having their funds stolen.  I hope this is enough of a warning as this is a fairly common scheme that tends to result in users trusting telegram accounts impersonating someone else and then losing their money by sending it to an escrow agent who has been communicating with alt accounts.