Telegram Mini App Marketplace Development with Escrow and Crypto Payments

Overview

E-commerce / Marketplace / Digital Platforms • Telegram Mini App + Admin Panel • MVP → Growth and Scaling

Project Type

Web / Telegram Mini App + Admin Panel

Format

Telegram Mini App for buyers and sellers + Admin Panel

Project Stage

MVP → Growth and Scaling

Telegram Mini AppE-commerceFiat & Crypto PaymentsMVP

About the Project

The project is a full-featured marketplace built inside Telegram, where users can act as both buyers and sellers.

The platform addresses several core business needs:

secure peer-to-peer transactions

transparent fee structure

support for both fiat and crypto payments

convenient logistics and order tracking

centralized management and moderation

The main interaction channel is the Telegram Mini App, allowing the business to leverage Telegram’s existing audience without requiring a separate app installation.

Challenge

Core Business Objective

Build a marketplace inside Telegram that:

simplifies buying and selling

ensures transaction security

supports multiple payment methods

scales with user growth and transaction volume

Project Goals

Launch an MVP Telegram Mini App for commerce

Implement a secure escrow-based settlement flow

Support bank card and USDT payments

Introduce a flexible fee model

Build a full-featured admin panel

Prepare the architecture for scale and future expansion

Solution

We developed a Telegram Mini App marketplace covering the full user journey:

product listing creation
search and filtering
checkout and payment
delivery tracking
delivery confirmation
release of funds to the seller

In parallel, we built an Admin Panel for managing users, products, orders, and content moderation.

Features

User App (Telegram Mini App)

For buyers and sellers:

Authentication via Telegram API

Product catalog with search, filters, and sorting

Product detail pages and seller profiles

Cart grouped by seller

Checkout flow with payment method selection

Favorites for products and sellers

Order history

Delivery address management

Order status notifications via Telegram bot

Additional features for sellers:

Product management (create, edit, archive)

Product promotion boosts

Fee model selection

Order management and tracking number submission

Admin Panel

User management (view, block, delete)

Product and complaint moderation

Category and filter management

Order and order status management

Manual dispute resolution

Complete order change history

Payments and Fees

Supported Payment Methods

Bank cards

USDT cryptocurrency via TON Connect

Key Features

Funds are held until the transaction is completed

Automatic release of funds to the seller after delivery confirmation

Flexible fee system: fixed service fee, percentage-based platform fee, and bank processing fee

Ability to choose whether fees are paid by the buyer or the seller

Buyer discount for crypto payments

Logistics and Orders

Multi-stage order status system

Integration with shipping aggregators (CDEK, Russian Post, BoxBerry, etc.)

Order tracking by tracking number

Notifications for every status change

Dispute mechanism with manual admin intervention

Architecture

Client-server architecture

Separation between user app and admin panel

Centralized database

Asynchronous processing for orders and notifications

Modular integrations layer for payments and shipping

Challenges and Solutions

Key Challenges

Payment provider integrations under operational constraints

Supporting crypto payments without smart contracts

Complex fee calculation logic

Multi-stage order workflows

User-generated content moderation

Working with third-party delivery APIs

How we solved it:

Designed a flexible payment model
Moved fee calculations to the backend
Formalized the order status system
Used a modular integration architecture
Rolled out functionality in phases

Project Team

CTO

Project Manager

Business Analyst

Backend Developer

2 Frontend Developers

QA Engineer

DevOps Engineer

UI/UX Designer

Methodology: Agile / Scrum — sprints, regular demos, and iterative development.

Results

Deliverables

A full-featured MVP Telegram Mini App marketplace

Admin panel

Scalable infrastructure ready for growth

Business Impact

A new sales channel inside Telegram

Centralized order management

Transparent fee model

Higher content quality control

Readiness for audience and transaction growth

Tech Stack

Frontend

TypeScriptReactViteTelegram WebApp API

Backend

Node.jsTypeScriptMongoDB

Integrations

Telegram APIPayment Providers (Cards)TON Connect (USDT)Delivery Service APIsExchange Rate Services

Localization

RU / EN

What the Team Is Proud Of

Well-thought-out business logic

Flexible and scalable architecture

A complex but transparent fee model

UX tailored for fast in-Telegram user flows

Outcome

The project is a full-featured marketplace inside the Telegram ecosystem, with support for fiat and crypto payments, an admin panel, and delivery service integrations.

The resulting architecture ensures transaction security, transparent fee handling, and readiness to scale as both user base and transaction volume grow.

Telegram Mini App Marketplace Development with Escrow and Crypto Payments(NDA)