This website uses cookies to help improve your user experience
Meet our client
Client
Ecommerce company
Product
Food box ordering solution
Project business goal
Grow user conversions and optimize costs through payment infrastructure revision
The project timeline in a nutshell
Chapter 1: Migration to 3DS payments
Implemented 3D-Secure (3DS) authentication across the platform and optimized its performance to enhance 3DS operations’ execution.
Chapter 2: PayPal integration
Introduced PayPal as a new payment provider to expand user payment options.
Chapter 3: Live user payment migration
Migrated card payments for 1.5M+ users from Checkout.com to Braintree (PayPal) on a live system with zero downtime.
Our client’s trust by the numbers
50,000+ daily recurring transactions
Engineering fault-tolerant payment infrastructure for continuous, error-free performance
$100 million processed per year
Handling high-value transactions with proven security and compliance
3D-Secure migration: where the collaboration began
“Our story began with the 3DS payment authentication migration. We inherited the project from another team during the first major migration phase. That handover gave us crucial insights into how the payment system was originally built and operated.
We worked closely with the original squad, especially as we transitioned from regular payments to 3D-Secure. It was a complex time — many feature components were being changed or newly developed, and we ran parallel streams for nearly six months. Eventually, we implemented robust 3D-Secure authentication to enhance payment safety and compliance and took over full ownership of the entire client’s payment system.”
We worked closely with the original squad, especially as we transitioned from regular payments to 3D-Secure. It was a complex time — many feature components were being changed or newly developed, and we ran parallel streams for nearly six months. Eventually, we implemented robust 3D-Secure authentication to enhance payment safety and compliance and took over full ownership of the entire client’s payment system.”
— Oxagile’s team
Aiming to scale user conversions via PayPal integration
“Our move from Checkout.com to PayPal (Braintree) was driven by a few key hypotheses we wanted to validate. We believed PayPal’s out-of-the-box 3D-Secure setup — combined with their lightweight JavaScript SDK — could reduce friction steps at checkout and improve conversion rates. There was also a noticeable difference in transaction fees, which made the switch even more compelling due to its cost-effectiveness. While the cost benefits were clear, the real test was whether the smoother user experience would help us retain more users.”
— The client’s Project Lead
Strategic partnership: Oxagile leads payment processing
Expanded payment options via PayPal
Integrated PayPal as a new PSP to expand payment flexibility and improve checkout performance.
Real-time user migration at scale
Orchestrated a phased migration of over 1M users from Checkout to PayPal card payments; no service execution delayed.
Working through similar payment system needs?
Why not reach out to discuss the details behind your project?
Tech and strategic factors that impacted the migration
The transition to Braintree as the new payment gateway, while maintaining the existing one in sync, introduced a number of technical challenges we had to keep in mind.
Gateway abstraction and custom integration
- The client chose to build a custom gateway integration through a separate squad.
- This added architectural complexity, requiring compatibility with both existing systems and Braintree’s API.
- Ensured data integrity and system performance throughout the project delivery.
Working in sync with the client’s product approach
Experimentation strategy
To improve paid subscriber conversion during signup, we implemented a controlled experiment using feature flags to release new ones to a limited number of users each month. Users were split between Checkout.com and PayPal flows, allowing us to compare conversion rates by payment provider.
PSP migration rollout
If an experiment showed positive results, the updated flow was expanded incrementally to more users. Once confirmed successful, the new flow replaced the old one entirely, ensuring continuous optimization based on real user data.
Ensuring payment continuity, 24/7
We introduced an effective payment support framework that brings clarity and control to complex system operations. By combining system playbooks, real-time observability, and automated incident response, we ensure rapid issue detection, reliable SLA coverage, and precise recovery objectives across every component.
Delivering results the client relies on
Accelerated payment gateway migration
We successfully transitioned from Checkout.com to Braintree within a focused three-month timeline, balancing speed with stability to minimize disruption.
Seamless live migration execution
All migration processes were executed in a live production environment, carefully coordinated to maintain uninterrupted payment operations for the active user base.
End-to-end support ownership
Following the PayPal integration rollout, we assumed full responsibility for technical support related to user payments, establishing a robust, always-on support framework to ensure reliability and responsiveness.
Related projects
