Bank IT Transformation: Trends, Challenges, and Foundations of the Next‑Generation Digital Banking Architecture

Author : Liu Weiguang, Vice President of Ant Financial and General Manager of Ant Financial Cloud, focusing on commercial promotion and ecosystem building of financial cloud technology.

1. Introduction

Bank IT transformation is a large‑scale topic that has moved from a supporting role to a strategic priority, with technologies such as big data, artificial intelligence, blockchain, IoT and cloud computing becoming integral to core financial services and innovative scenarios.

2. Background and Characteristics of Bank IT Transformation

Financial institutions now emphasize high‑coverage, low‑cost, high‑efficiency, and high‑security inclusive finance; they are reshaping end‑to‑end customer journeys, serving small‑and‑medium enterprises, and continuously evolving scenario‑driven services.

Technology must be tightly coupled with business scenarios—AI, big data, blockchain, etc.—to drive both technical and business innovation.

3. Trends and Foundations of Bank IT Transformation

Key trends include the emergence of direct‑sale, internet, and private banks; the construction of customer‑centric, cloud‑native distributed core systems; and the need for open, platform‑based financial services.

Traditional core systems, often built on IBM mainframes or IOE architectures, are no longer suitable for modern, high‑concurrency, internet‑driven services, necessitating a shift to cloud‑based, distributed designs.

Two main approaches are identified: slimming existing legacy cores by moving functions to middle‑office platforms while building a new internet core, and a more aggressive route of replacing the legacy core with a single, modern distributed core.

4. Technical Challenges

4.1 Micro‑service Distributed Architecture – Rapid product innovation requires breaking down domain models into micro‑services that can be released weekly, supporting gray‑scale and secure cloud deployments.

4.2 Distributed Transaction Processing – Maintaining strong consistency and high performance for balance‑critical operations in a distributed environment demands mature, proven frameworks.

4.3 Distributed Data Processing – High‑throughput, secure data handling is addressed by Ant’s self‑developed distributed database, which combines Paxos‑based coordination, hybrid memory/SSD storage, and LSM‑based log synchronization.

5. Strategic Alignment

From a national perspective, reducing reliance on foreign core technologies aligns with strategic goals; cloud‑native, distributed architectures are seen as inevitable.

Domestic expertise now exists in distributed tech, databases, and related fields, providing reliable, internet‑scale solutions.

6. Building the Next‑Generation Digital Banking System

The future core banking system must be customer‑centric, built on cloud‑native micro‑services, and support virtually unlimited horizontal scaling through multi‑active, geographically distributed data centers.

International banks are already focusing on cloud‑based, mobile‑first digital banking, and advances in biometric authentication, AI, and risk control will enable fully mobile, channel‑agnostic banking experiences.

Ant Financial’s comprehensive fintech stack—covering cloud infrastructure, distributed databases, AI, blockchain, and biometric identity—positions it to help banks achieve digital upgrades and explore new financial scenarios.

Conclusion

The next‑generation internet‑centric core banking system requires a shift from account‑centric to customer‑centric models, cloud‑native micro‑service architectures, and multi‑active data center designs, enabling rapid innovation, scalability, and secure digital banking services.