Bot task formulation: moderation, user support, notifications, material selection, sales automation, etc.
Functionality definition: answers to frequently asked questions, auto replies, buttons and menus.
Language and framework: Python (python-telegram-bot), Node.js (telegraf), PHP, Go, etc.
Web hosts and server: VPS, cloud functions (AWS Lambda, Google Cloud Functions), containers (Docker).
Database: SQLite, PostgreSQL, Redis for caching.
Creating a bot in BotFather, obtaining a token.
Setting up webhooks or long polling.
Parsing Telegram API: updates, messages, commands, buttons, inline mode.
Handling commands and messages:
/start, /help, /settings, etc.
Contextual navigation through buttons
Responses and templates:
Welcome texts, FAQ, personalization
Posting from the bot, retransmission, notifying subscribers
2000-5000 UAH. Individual payment, suggest your price