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EURUS CASE STUDY

Serverless Architecture for Banking/Payment Platform of a fintech company

Client Overview

A U.S.-based fintech company that builds modern domestic and cross-border payment platforms for banks. Its solutions enable secure, high-volume financial transactions across multiple payment channels, allowing financial institutions to modernize legacy payment infrastructure while delivering faster, more reliable customer experiences.

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Business Challenge

The company aimed to design and adopt a serverless architecture capable of supporting multiple banking tenants, handling core operations such as payments processing, regulatory compliance, reporting, and real-time monitoring on a shared yet securely isolated platform.

Traditional monolithic and server-based architectures struggled to meet the demands of high-volume payment processing, complex regulatory workflows, and real-time monitoring across diverse banking tenants.

Key goals included

01
The primary goal was to design a serverless, cloud-native platform that could support multi-tenant banking operations at scale while remaining secure, compliant, and highly available.
02
Another key objective was to provide strong tenant isolation and centralized governance, allowing multiple banks to share core services while maintaining strict separation of data, configuration, and credentials.
03
Finally, the solution aimed to improve time-to-market for new banking clients and features, reduce operational complexity through managed cloud services, and create a flexible foundation that could evolve with changing payment standards, regulatory requirements, and transaction volumes.

Solution Approach

Eurus Technologies worked with Finzly to design and deliver a cloud-native, serverless banking platform on AWS, capable of supporting multiple banks on a shared, scalable infrastructure. Core capabilities such as payments, compliance, reporting, monitoring, and notifications were implemented as independently deployable microservices.

Key solutions
delivered included:

Serverless Compute and Workflow Orchestration

The platform used AWS Lambda as the primary compute layer to enable automatic scaling and reduce operational overhead. Payment and compliance workflows were orchestrated using AWS Step Functions, providing reliable execution, built-in retries, and full traceability across processing stages.

Multi-Tenant Architecture and Client Onboarding

A multi-tenant architecture was implemented to allow shared services while ensuring strict isolation of tenant data, configuration, and credentials. Tenant-specific resources were provisioned dynamically, enabling rapid onboarding of new banks without affecting existing clients.

Managed Data Services and Secure API Access

Managed AWS services were used to ensure performance and reliability at scale. MySQL was accessed through RDS Proxy for efficient connection management, S3 was used for secure file and report storage, and API Gateway provided a secure entry point with custom authorization.

Monitoring, Reporting, and Event-Driven Integration

Built-in monitoring and reporting services provided near real-time visibility into payment flows, system health, and exceptions. Asynchronous, event-driven integrations using SQS and EventBridge improved resilience and decoupling across services.

Business Impact and Platform Outcomes

The solution enabled Finzly to modernize its payment infrastructure, efficiently support multiple banking clients, and scale securely while adapting to evolving regulatory and business needs.

Why Fintech Company Chose Eurus Technologies

Demonstrated expertise in cloud-native architectures and serverless platform implementation

Cost-effective approach aligned with the scope and scale of Finzly’s multi-tenant banking platform

Strong alignment in culture and communication, ensuring seamless collaboration with Finzly’s team

Tools & Technologies Used

Runtime & Frameworks

  • Node.js (v16), Java (v8)
  • Serverless Framework v3

Databases & Storage

  • MySQL via AWS RDS Proxy
  • Amazon S3 for file/document storage
  • AWS Secrets Manager for credentials
  • AWS SSM Parameter Store for configuration

AWS Core Services

  • AWS Lambda, AWS Step Functions
  • API Gateway, VPC, SG, Route53
  • RDS, RDS Proxy, S3
  • SQS, EventBridge
  • IAM, Cognito
  • Cloudwatch

CI/CD

  • Jenkins

Client Testimonial

“Eurus Technologies delivered a highly scalable, secure, and fully serverless platform that transformed our payments infrastructure. Their expertise in cloud architecture and multi-tenant solutions allowed us to onboard new banking clients quickly while maintaining strict data isolation and compliance. The team’s proactive communication and deep technical knowledge made the collaboration seamless and highly productive.”

Success Metrics

  • All core services including payments, compliance, reporting, monitoring, and notifications were implemented and operational.
  • Multi-tenant architecture ensured strict data isolation for all banking clients while enabling shared infrastructure.
  • End-to-end payment workflows were fully automated and executed reliably using AWS Step Functions.
  • Event-driven integrations using SQS and EventBridge functioned without failures, ensuring asynchronous processing resilience.
  • The team consistently addressed questions and clarifications promptly throughout the engagement.
  • Company was able to onboard new banking clients efficiently with minimal operational overhead.

Achievements & Impact

The partnership between Finzly Inc. and Eurus Technologies highlights how a strategic, cloud-native approach can transform banking operations. By designing and deploying a multi-tenant, serverless platform on AWS, implementing automated payment workflows, and ensuring robust monitoring and compliance capabilities, Eurus delivered a scalable, resilient, and secure banking environment. This solution enabled Finzly to modernize its payment infrastructure, efficiently onboard new banking clients, and adapt rapidly to evolving regulatory and business needs.