Telegram Auto-Join Bot Development

I want a small service that can take one (or many) Telegram account sessions, start a bot from that very same session, and immediately make the account join a channel I specify. After joining, the account does not have to post or listen for anything—the goal is simply to be inside the channel... (Budget: ₹2000 - ₹2500 INR, Jobs: API Development, Automation, Linux, Node.js, Python, Software Architecture, Software Development, Telegram API, Web Development)