Pleenk. Secure Payments Platform

The client operated in a market where every millisecond of payment latency costs revenue. Their existing infrastructure could not scale beyond 1,000 transactions per second, and fraud screening added unacceptable delay to the checkout flow. Payment failures during peak traffic windows were eroding merchant trust and driving churn. Pleenk needed a platform capable of processing 5,000+ TPS with end-to-end latency under 100ms – including real-time fraud detection – while maintaining PCI DSS Level 1 compliance and 99.99% uptime.

The team aimed to:

• Process payments and settlements in real time with low latency.
• Provide built-in fraud detection and risk monitoring.
• Offer secure APIs for merchants and digital platforms.
• Ensure compliance readiness and auditability across all transactions.

We staffed the project with FinTech infrastructure engineers experienced in event-driven architectures, real-time fraud systems and PCI-compliant cloud deployments. Our approach began with a throughput stress test of the existing system to identify bottlenecks, followed by an incremental migration to microservices with Kubernetes auto-scaling. We ran quarterly penetration testing and SOC 2 audit preparation in parallel with feature development – security was never an afterthought.

The backend is built on Java and Spring Boot, providing a stable, extensible foundation for payment workflows, transaction processing and API services. Apache Kafka streams payment events and state changes, while Apache Flink processes these streams in real time to handle validations, risk assessments and transaction status updates. This architecture ensures that payments are processed accurately and without delay.

Pleenk offers a modern web interface built with React and Next.js. Merchants can access dashboards for transaction monitoring, reporting and reconciliation, while administrators manage risk controls and system configuration through secure web tools.

PostgreSQL and Apache Cassandra store transactional data, account states and audit logs at scale. Redis provides low-latency caching for active sessions and authorization data. Apache Pinot supports real-time analytics for transaction monitoring and performance metrics. The entire platform runs on Kubernetes with Istio for traffic management and is deployed on AWS to ensure elasticity, high availability and fault tolerance.

Pleenk processes transactions in real time with integrated validation and monitoring, ensuring a fast user experience and accurate management of financial state.

The platform continuously analyzes transaction patterns and events to detect anomalies and reduce fraud risk.

Well-documented, secure APIs enable businesses to integrate Pleenk payments into their web and mobile applications easily.

We built a payment engine that processes 5,000+ transactions per second with 99.99% uptime across production environments. Our architecture delivers end-to-end transaction latency averaging under 100ms including inline fraud screening – eliminating the checkout delays that previously cost the client merchant relationships.

We implemented real-time fraud monitoring, end-to-end encrypted data flows and PCI DSS Level 1 compliance across the entire transaction lifecycle. Our team established quarterly penetration testing and SOC 2 audit trails from launch. The platform has maintained zero security breaches since deployment – a track record that directly accelerated merchant onboarding.

We designed a microservices architecture with Kubernetes auto-scaling that absorbs 3x traffic spikes during peak periods without manual intervention or performance degradation. Our platform now processes $2M+ in daily transaction volume across multiple payment rails and currencies, giving the client a foundation built for global expansion.