At GAMM Technologies, I built Dersha end to end, on my own: a full Telegram Mini App for tracking and settling shared expenses between friends, backed by its own API, real-time layer, and Telegram bot.

Identity & Friends

• Telegram-native onboarding and login: users sign in with their Telegram identity and receive a session token, no separate account needed
• Friend management: friend requests, acceptance, private friend codes, and unfriending

Expenses & Money

• Shared-expense tracking and settlement between friends, including group expenses
• A personal money ledger covering income, expenses, loans, and savings, with statistics on top
• Bank-account sharing, so friends can pass along payment details securely

Real-Time & Bot

• Live updates and Telegram notifications, including automatic unpaid-bill reminders
• An embedded Telegram bot that delivers notifications and supports in-chat actions

Admin

• An admin monitoring and messaging API: dashboard statistics, user lookup, and broadcast messaging to reach the whole user base