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Project Overview
We recently tackled an interesting project: integrating credit and debit card processing directly into dedicated Android-based payment terminals (PAX A920) for our long-term client, Value.io. While Android development is in our wheelhouse, working with secure payment devices presented unique learning opportunities.
The Power of a Multidisciplinary Team
Integrating with PAX terminals involves navigating strict security protocols, limited hardware resources, and fragmented documentation. To tackle these challenges, we assembled a team of project managers, QA analysts, senior Android engineers, and DevOps experts.
This collaborative approach helped us:
- Quickly isolate challenges
- Create targeted tests to validate assumptions
- Share insights continuously
What could have been blockers turned into valuable learning opportunities for the entire team.
Balancing Control and Security
Payment terminal integration usually offers two pathways: full and semi-integration.
We opted for semi-integration, leveraging SDKs for secure card data management rather than taking full control ourselves. This approach allowed us to:
- Meet critical PCI DSS compliance and data security requirements
- Retain enough control to ensure a positive and intuitive user experience for store staff
The Value of a Modular Approach
We approached development modularly, breaking the system into manageable and testable components:
- SDK validation
- Simplified UI design
- Robust backend architecture
- Thorough app development
- Seamless client system integration
This modular workflow let us build and test each component in isolation, moving quickly without compromising stability.
The Result
Thanks to these hard-earned lessons and our team’s collaborative spirit, our client now benefits from a secure, user-friendly payment management solution deployed on their PAX A920 terminals.
- Supports a wide variety of payment methods
- Integrates seamlessly with existing backend systems
- Offers a scalable architecture ready for future growth
Let’s Talk
Do you have a complex hardware integration challenge? We’d love to help you conquer it.
