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Building an Open API Marketplace to Power Omni-Channel Retail Banking

Explore how Nihilent helped Africa's leading bank design and deliver an Open API Marketplace that unified retail banking across 15+ channels and product systems, delivering ZAR 1 billion in business value.

Service

Strategy & Consulting; Digital Automation; Technology Transformation; Data & Analytics; Microsoft; AWS

Vertical

BFSI

Region

Africa

Tech Stack

Open API Marketplace, BPM, ECM, MDM, OAuth 2.0, Microservices, Data Analytics, Automated Decision Making

Building an Open API Marketplace to Power Omni-Channel Retail Banking

Client Overview

The client is Africa’s leading bank with a broad retail banking portfolio spanning payments, loans, cards, investments, and more. To achieve its vision of being digitally first, the bank needed a unified integration layer capable of connecting diverse channels, backend systems, and support platforms seamlessly.

Business Challenges

Fragmented systems and disconnected channels were limiting the bank's ability to deliver a consistent, modern retail banking experience.

01

Disconnected Channel Experience

Customers interacted across web, mobile, branch, ATM, chatbot, and more, but without a unified layer connecting these touchpoints.

02

Complex Backend Integration

Multiple backend systems covering payments, loans, cards, CASA, investments, and stock broking operated in silos with limited interoperability.

03

Limited API Standardisation

The absence of a centralised API framework made it difficult to scale integrations and onboard new services efficiently.

04

Security & Compliance Gaps

Managing customer identity, access, mandates, and compliance across systems required a robust, standardised governance approach.

05

Slow Feature Delivery

Without a scalable integration architecture, delivering new product features across channels was slow and resource-intensive.

06

Inability to Scale Digitally

The existing architecture could not support the volume and variety of digital interactions required for a truly omni-channel banking experience.

How Nihilent Addressed This

Nihilent designed and delivered an Open API Marketplace as the central integration layer, connecting all channels, support systems, and backend banking platforms.

Open API Marketplace

Built a centralised API layer enabling seamless connectivity across 15+ product systems and 1000+ microservices

Omni-Channel Enablement

Integrated 15+ client touchpoints including web, mobile, branch, ATM, digital wallet, smartwatch, chatbot, and social media

Backend System Integration

Connected core banking domains - payments, loans, cards, CASA, investments, stock broking, and VAS, through standardised APIs

Support Systems Architecture

Implemented BPM, ECM, MDM (Customer 360), OAuth 2.0 security, mandates, and compliance frameworks as foundational support layers

Microservices Delivery

Delivered 1000+ microservices across 15+ tech streams to enable modular, scalable feature development

Automated Decision Making & Analytics

Embedded data analytics and automated decision-making capabilities to enhance personalisation and operational intelligence

Key Results & Outcomes

ZAR 1 billion

in business value delivered

15,000+

user stories delivered across programs

500+ features

delivered across retail banking

1000+ microservices

built and deployed

15+

product systems integrated

15+

tech streams enabled

Omni-channel

client experience achieved across all digital and physical touchpoints

Key Takeaways

By placing an Open API Marketplace at the core of its retail banking architecture, the bank unlocked the ability to innovate rapidly, scale digitally, and serve customers consistently across every channel - turning a fragmented landscape into a connected, high-value digital ecosystem.

Nihilent
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