Built from the ground up. Maintained and supported for 17 years.
Context
E2's founders and team developed a multi-tenant rewards platform for Xexec from the ground up and maintained and supported it from 2008 to 2025. Over those 17 years, they updated the platform, added features, and managed its servers on private cloud infrastructure. The platform served more than four million registered users and processed GBP 50 million in transaction value annually. It was used by large organisations, including government departments and major firms. After Xexec and Reward Gateway combined operations in 2022, the founders and team continued looking after the system during the migration period.
The challenge
The platform needed to:
- 01Support millions of users
- 02Handle Black Friday transaction volumes around ten times normal levels while preserving commercial data transactionally
- 03Support different user experiences for more than 400 tenants on a shared platform
- 04Adapt continuously as client requirements evolved
- 05Protect personal data and support GDPR requirements, security audits, and penetration testing
At the same time, it needed to remain stable and reliable.
Our approach
From 2008 to 2025, the founders and team developed the platform, delivered updates and new features, provided support and maintenance, and managed its private cloud servers. Their approach focused on:
- To reduce database contention, we kept commercial database transactions short and used RabbitMQ to queue transaction notifications through a processing workflow. Email delivery ran in a separate step so network failures did not hold up the database transaction. SQL Server idempotency checks prevented duplicate processing.
- A configurable widget platform, tenant-specific themes, and feature flags supported different experiences across more than 400 tenants. We also built custom themes for high-value customers.
- Encryption protected data at rest and in transit, with access controls, tenant isolation, and audit logging for data access.
- The team handled data retention and deletion, individual rights requests, development and support data, incident handling, and processing arrangements to support the client's GDPR obligations.
- Multiple security audits and penetration tests took place each year. The team provided audit support, and all audits concluded successfully with the required remediation completed.
- Private cloud server management
- Continued system support during the migration period
The goal was to keep the platform stable, maintainable, and commercially practical as it grew.
Working as a long-term technical partner
We worked directly with Xexec's stakeholders to clarify requirements and turn business priorities into deliverable changes. Xexec set commercial priorities, while our team advised on technical approach, effort, dependencies, and operational risk.
We coordinated feature reviews, releases, and ongoing support through an agreed delivery process. We also coordinated integrations and incidents with hosting, payment, and identity providers, including SAML and OAuth integrations.
After Xexec and Reward Gateway combined operations, we continued maintaining the existing platform and collaborated with the migration team during the transition.
Outcome
After the transaction-processing changes, the platform handled Black Friday transaction volumes around ten times normal levels without issues for many years. The founders and team's responsibility extended from the initial build through ongoing feature development, maintenance, support, private cloud server operations, and looking after the system during migration.
Full lifecycle responsibility, from the initial build to long-term support.
The founders' experience, with their team, of developing and operating a substantial platform from its initial build through the migration period.
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