MARS — Core Banking System

Mars is ConnectPay’s in-house core banking system — the technology responsible for processing transactions, maintaining account balances, and ensuring financial operations run reliably.

In simple terms, it is the engine that powers everything we do.

Transaction processing

Handles every transaction with precision and speed, ensuring accurate financial operations.

Account management

Maintains real-time account balances and states as the single source of truth.

Financial reliability

Ensures all financial operations run reliably with complete operational integrity.

For many fintechs, the core banking system is provided by an external vendor. While this allows companies to launch quickly, it also creates a critical dependency.

By building Mars, ConnectPay removed that dependency and gained full control over its infrastructure.

Vendor dependency

External cores create critical infrastructure dependencies

Full control

Owning the core means complete operational independence

Increased resilience

Direct control over the most critical infrastructure

“The core system is the single source of truth for every account and transaction. Owning it changes everything.”

Before

Vendor-controlled roadmap

Development priorities dictated by external vendor
Slower changes

Delayed feature releases and iterations
Limited visibility

Dependency on vendor for system insights

After

Internal development

Complete control over development priorities
Faster iterations

Rapid deployment of new features and updates
Direct system visibility

Full transparency and control over infrastructure

When you control the engine, innovation moves faster

When the core infrastructure is external, issue resolution depends on vendor timelines.

With Mars, ConnectPay engineers can identify and resolve problems directly.

Control over uptime

Direct management of system availability and performance metrics without external dependencies.

Faster incident response

Immediate access to system diagnostics and the ability to implement fixes without vendor delays.

Internal monitoring

Comprehensive, real-time visibility into every aspect of the system’s health and performance.

24/7

Operational control

100%

System visibility

Direct

Issue resolution

Zero

Vendor dependencies

Modular system design

Built with independent, interconnected components that can be developed, tested, and deployed separately. This enables parallel development and reduces system-wide risks.

Scalability

Designed to handle growth in transaction volume and user base without compromising performance. The architecture supports horizontal scaling across all critical components.

Regulatory alignment

Built with compliance at its core. Every architectural decision considers regulatory requirements, audit trails, and financial reporting standards.

Comprehensive monitoring

Real-time observability across all system layers. Metrics, logs, and traces provide complete visibility into system behavior and performance.

High-level technical approach

Mars employs microservices architecture with event-driven communication patterns. This ensures loose coupling between services while maintaining strong consistency guarantees for financial transactions.

The system leverages distributed ledger principles without blockchain overhead, providing immutable audit trails and transaction history while maintaining performance.

Building a core banking system is one of the most complex projects a fintech can undertake. It requires deep engineering expertise, architectural vision, and an understanding of financial systems at a fundamental level.

The Mars project represents years of accumulated knowledge and experience, brought together by a team capable of executing on this level of technical complexity.