Inside Bluerails: The Architecture of a Global Crypto & Fiat Payment Platform

In our previous post, we detailed our API and the logic behind our crypto and fiat payment flows. Now, we explore the engineering foundation that underpins it all. Our platform is built on these principles using a modern cloud-native approach on AWS.

High-Level Architecture: Secure and Modular by Design

Our architecture is built around a single, highly secure Service VPC (Virtual Private Cloud). Within this VPC, we enforce a strict logical separation of concerns between our core platform and our integration layers.

• Core Services: This is the brain of the platform. It includes the services responsible for payment orchestration, state management, and maintaining the immutable financial ledger.

• Connectors: These are specialized microservices, each responsible for communicating with a specific external network. We run separate connectors for each blockchain (e.g., Bitcoin, Ethereum) and each banking partner. This modularity isolates external dependencies and allows us to add new payment rails without altering the core system.

This design ensures that the core logic of our platform is insulated from the complexities of any single payment network.

While we currently focus on crypto and fiat rails, this modular connector architecture is designed for extensibility. It provides a clear path to adding new payment methods in the future—such as card networks—by simply developing a new connector and, if required, deploying it into its own segregated, compliant environment.

The Cloud Foundation on AWS

Our entire infrastructure is defined as code, allowing for repeatable, auditable, and version-controlled deployments.

• Network Security: All services run in private subnets with no direct access from the internet. We use AWS PrivateLink to communicate with other AWS services, ensuring traffic never traverses the public internet.

• Scalability & High Availability: Our services are containerized and orchestrated with Amazon ECS. We run all critical components across multiple Availability Zones (AZs). This provides high availability, meaning our platform can withstand a full data center outage without interruption. Services autoscale based on traffic and queue length, ensuring performance under load.

• Data & Recovery: Our primary database is a PostgreSQL RDS instance configured for multi-AZ automatic failover. All data is encrypted at rest. For disaster recovery, we maintain encrypted, cross-region replicas in a separate AWS account, allowing us to restore service in the event of a regional failure.

Built for Trust

Operating as a licensed payment institution requires more than just a functional API; it demands an infrastructure built for security and resilience. By separating concerns, designing for failure, and embedding security into every layer, we have engineered a platform that meets the rigorous standards of the global financial industry.

This is the foundation on which Bluerails operates—providing trusted, reliable, and scalable payment infrastructure for the digital asset economy.