Scalable Serverless Architecture for Next-Gen Digital Banking

1. Regulatory Compliance Across Jurisdictions: Digital banks operating internationally must navigate a complex and evolving regulatory landscape, including KYC, AML, GDPR, and local fintech laws. Staying compliant requires continuous updates to internal systems and processes to mitigate legal and reputational risks.

2. Integration with Legacy Infrastructure: Despite offering modern digital experiences, neobanks often depend on legacy systems when interacting with traditional banking networks. These outdated platforms limit real-time data exchange, increase integration costs, and slow down innovation.

3. Security and Fraud Risk Management: The financial sector faces growing cybersecurity threats. Neobanks must implement advanced fraud detection, biometric authentication, and real-time monitoring to safeguard customer data, all while maintaining a seamless and user-friendly experience.

4. Delivering Scalable and Inclusive User Experiences: Creating intuitive, high-performance digital interfaces that serve diverse user groups across different regions, devices, and connectivity conditions requires constant iteration, localization, and UX optimization at scale.

The platform is a UK-licensed neobank designed to simplify banking for users living or traveling abroad, offering fully digital accounts with international banking partners. The digital banking app offers an intuitive, fast, and secure platform with a comprehensive set of cutting-edge neobanking tools, including:

• Daily banking

• Cross-border transactions

• Investment

• Wealth management, and more

Clients in multiple regions can open GBP and USD accounts from anywhere using only the fee-free app, their passport, and civil ID.

A digital banking app was developed through close collaboration between frontend, backend, and QA teams.

The app's core functionality is structured into multiple domains:

• Onboarding

• Banking

• Payments

• Compliance

• Wealth

Each domain operates its own service or set of services. Most are serverless, built using a serverless framework with JavaScript.

A GraphQL gateway enables client-server communication, while AWS services such as SNS, SQS, and EventBridge support internal messaging.

Some conventional services written in Go run in Kubernetes. Additional services are being migrated to containers, with cross-service communication managed through Temporal.IO-driven workflows.