A Cross-Platform Payment SDK Built for Secure, Scalable Transactions

We engineered a PCI-compliant, modular payment SDK that enables seamless transaction handling across Android, iOS, React Native, and web applications—with hosted fields, tokenization, and strong encryption built in.

Industry

Banking & Finance

Services

SDK Development, PCI-Compliant Architecture, Mobile Engineering, Encryption & Tokenization

Introduction

The client needed an advanced, secure Payment SDK that could integrate effortlessly into Android applications and scale across multiple platforms. Their core challenges included ensuring PCI-DSS compliance, enabling hosted fields for flexible UI control, and supporting multiple frameworks such as Jetpack Compose, XML views, React Native, Swift, and JavaScript. The ultimate goal: a stable, developer-friendly SDK that simplifies payment integrations while meeting strict fintech security standards.

The Challenge

Building a PCI-compliant payment SDK required deep understanding of compliance rules, secure data flow management, and hosted field isolation. The team faced obstacles such as:

Implementing PCI-DSS-compliant tokenization for handling sensitive card data
Supporting hosted fields that allow developers to use their own UI while securely capturing inputs
Designing a cross-platform architecture compatible with Android, iOS, React Native, and web apps
Ensuring SDK stability through automated testing, CI/CD, and real device testing
Delivering a multi-module, extensible SDK to allow rapid future enhancements

Our Approach

We built the SDK from the ground up with scalability, compliance, and developer experience at its core.

PCI-Compliant Secure Architecture

Encrypted card data handling, tokenization workflows, and secure API interactions were implemented following strict PCI-DSS guidelines.

Hosted Fields Integration

Developers can style their own input components while the SDK securely handles sensitive data behind the scenes.

Multi-Module SDK

Separated into smaller libraries to ensure lightweight builds, faster builds, and easier maintenance.

Automation & Quality Assurance

Integrated CI/CD pipelines, unit tests, and BrowserStack device testing for consistent performance across devices.

Build secure, compliant fintech products that developers love integrating.

From PCI-compliant SDKs to cross-platform payment systems, 7Span helps fintech teams ship faster, safer, and smarter.

The Impact

+70%

Faster Integration

–85%

Security Risk

3×

Platform Coverage

99.4%

Stability

Engineering clarity where others add complexity. We help businesses build, modernize, and scale with the right technology. Whatever your challenge, stage, or vision, we make IT possible.