I am not a telegram bot dev, but if you are in hurry to find one, here is the list of telegram bot developers that you might want to try.

Telegram Promotion & Airdrop Bot & Campaign Management
https://bitcointalk.org/index.php?topic=5262243.0

TELEGRAM BOTS MAKING || CUSTOM PHP SCRIPTS
https://bitcointalk.org/index.php?topic=5191786.msg52714890#msg52714890

[ANN] [Hire Me] Telegram Developer Bot
https://bitcointalk.org/index.php?topic=5216651.0

This one too
https://bitcointalk.org/index.php?topic=5216324.msg53574449#msg53574449

also, better to post the compensation before anyone will contact you.