RMS License Server — Unified licensing and billing platform for the RMS Digital Services ecosystem

Client: RMS Digital Services (in-house)

Website: https://license.rms-ds.com/

About the project

RMS License Server — is a centralized SaaS service for licensing, billing, and financial control, serving the entire ecosystem of RMS Digital Services products. The platform provides a full license management lifecycle: from key generation and hardware binding to payment processing, invoicing, and usage monitoring.

The service acts as a single entry point for all ecosystem products — WordPress solutions, AI tools, MCP integrations, and other SaaS products — providing a unified mechanism for authorization, accounting, and monetization.

Challenge

Create a scalable platform that solves several critical business tasks simultaneously:

• Unify licensing for heterogeneous ecosystem products (desktop software, web services, API)
• Automate billing with support for multiple payment systems and currencies
• Ensure reliable protection of license keys against copying and unauthorized use
• Provide transparent analytics on sales, activations, and product usage
• Minimize operational costs for license management and customer support
• Ensure global reach — customer support in their native language

Solution

A production-ready service with a microservice architecture, built on Clean Architecture principles. The system is divided into three independent components: a high-performance API server, an asynchronous worker for background tasks, and a modern web interface.

System Architecture

Backend API

High-performance REST API that handles all business operations: authentication, license management, payment processing, invoice generation. Strict input validation and multi-layer abuse protection are implemented.

Background Worker

A separate process for performing resource-intensive and asynchronous tasks:

• PDF invoice generation
• Sending email and Telegram notifications
• Cleanup of outdated transactions
• Task queue processing with guaranteed delivery

Frontend (Admin & User Dashboard)

Modern web interface with two role models:

• User Dashboard — license management, balance, purchases, software downloads
• Admin Panel — user management, products, payment gateways, transactions, monitoring

Key Features

Universal Payment Router

Unified interface for accepting payments through four payment systems:

• PayPal — international fiat payments
• Cryptomus — crypto payments with broad currency support
• NOWPayments — alternative crypto processing
• Plisio — additional crypto payment methods

All gateways are integrated via a unified adapter with webhook verification, automatic currency conversion, and atomic crediting of funds to the user’s balance. This allows customers to choose a convenient payment method and businesses to receive payments from anywhere in the world.

Licensing System

Support for two types of licenses with different protection mechanisms:

Software licenses (for desktop applications)

• Cryptographic keys with offline validation capability
• Hardware binding with a controlled number of reassignments
• Periodic activity verification (heartbeat) to prevent cloning
• Secure release download with cryptographic signature verification

Site licenses (for web products)

• Domain binding
• Centralized activation management
• Administrative reset of binding when necessary

Both license types support split activation — splitting one purchase across multiple devices/domains with flexible quota management.

Store and Billing

• Server-authoritative pricing — all calculations are performed on the server, the client only displays the result
• Internal wallet — atomic debit of funds without race conditions
• Promo codes with automatic reset and restrictions
• Affiliate program with automatic commission accrual
• Dynamic volume discounts (Volume Discounts)

Professional Document Workflow

• PDF invoices with sequential numbering and professional design
• Asynchronous generation — does not block the user interface
• Transaction history with the ability to re-download documents

Software Update Management

• Semantic versioning (semver) for accurate version comparison
• Release channels — stable, beta, alpha for different user groups
• Automatic notifications about new versions via email and Telegram
• License verification when downloading releases

Multi-channel Notifications

• Email — main notifications about transactions, licenses, releases
• Telegram Bot — instant alerts about critical events
• Push notifications in the dashboard
• Per-type settings — the user chooses which notifications to receive

🌍 Internationalization (45 languages)

The platform supports 45 languages out of the box, making it accessible to a global audience. Full interface localization is implemented, including:

• LTR/RTL support — correct display for right-to-left languages (Arabic, Hebrew, Persian, Urdu)
• Live language switching — instant language switching without page reload
• Localized dates — date formats adapted to regional standards
• Full UI localization — all interface elements, notifications, email templates

Geographic coverage:

This wide coverage allows serving clients from Europe, Asia, the Middle East and CIS in their native language, which is critical for a global SaaS product.

Technology Stack

Security

Security is a key priority when working with financial data and software licensing.

Authentication and Authorization

• JWT authentication with asymmetric signature
• Two-factor authentication (TOTP)
• Token versioning for instant session revocation upon compromise
• API keys for integrations

Data Protection

• Encryption of sensitive data (payment gateway configurations, personal information)
• Centralized secret management
• Cryptographic keys for licenses with secure seed storage

Abuse Protection

• Multi-level rate limiting with flexible configuration for different endpoint types
• Security headers (protection against XSS, clickjacking, MIME-sniffing)
• Validation of all input data
• Protection against path traversal attacks
• Recovery mechanism to prevent service crashes due to goroutine panics

Network Security

• Strict CORS policy with explicit specification of allowed origins
• Configurable trusted proxy
• Enforced HTTPS for all payment operations

Audit and Monitoring

• Structured logging of all critical operations
• Audit log with administrator action history
• Health check with verification of all dependencies
• Automatic cleanup of stale pending transactions

Result

A production-ready platform has been created that:

• Unites all ecosystem products under a single licensing system
• Accepts payments worldwide through 4 payment systems with automatic conversion
• Protects intellectual property using cryptographic methods
• Automates operational processes — from key generation to invoice issuance
• Provides transparent analytics on sales and product usage
• Scales thanks to asynchronous processing and caching
• Complies with modern security standards for working with financial data
• Serves a global audience in 45 languages with RTL support

Conclusions

RMS License Server — is not just a “license system”, but a full-fledged commercial platform covering the entire software monetization cycle. The project demonstrates a comprehensive approach to solving business problems:

Architectural Expertise

• Microservice approach with clear separation of responsibilities
• Asynchronous processing for responsive UI
• Atomic operations for handling finances
• Graceful shutdown and fault tolerance

Business Logic

• Support for multiple payment systems through a unified interface
• Flexible discount and promo code system
• Affiliate program with automatic calculation
• Multi-currency support with automatic conversion

Security

• Multi-level protection against license copying
• Cryptographic verification of releases
• Protection of financial operations from race conditions
• Comprehensive web application protection

User Experience

• Modern interface with mobile responsiveness
• Multilingual support (45 languages) with optimized loading and RTL support
• Multi-channel notifications
• Transparent history of all operations

Global Reach

• Support for clients from Europe, Asia, the Middle East, Caucasus, and CIS
• Localized date and currency formats
• Adaptation to regional cultural specifics

The project solves a real business problem of software monetization and can serve as a reference implementation for similar SaaS platforms.

Technical Stack

• Go
• Next.js
• PostgreSQL
• Redis
• Docker