PROCASH

A high-availability, transaction-intensive cashback and loyalty platform built from scratch to support large-scale promotional, cashback, and loyalty programs integrated with BRI Mobile Banking (BRIMO) and merchant ecosystems.

Scope & Ownership

• Initiated overall system architecture, technology stack, and service design from the ground up.
• Defined microservices boundaries, communication patterns, and data ownership.
• Led technical decisions for scalability, reliability, and transaction safety.

System Reliability & Performance Challenges

• Initially faced performance degradation and instability under high transaction loads (high requests per second).
• Encountered issues such as request spikes, timeout errors, duplicate processing, and downstream dependency failures.

Solutions & Technical Improvements

• Introduced event-driven microservices architecture to decouple critical transaction flows.
• Implemented Golang-based services optimized for high-throughput and low-latency processing.
• Adopted gRPC communication for internal service-to-service calls to reduce overhead.
• Designed idempotent transaction handling, retry mechanisms, and dead-letter queues to handle failures safely.
• Implemented asynchronous processing using RabbitMQ message queues to absorb traffic spikes.
• Improved database performance through query optimization, indexing strategies, and separation of read/write workloads.
• Added structured logging, monitoring hooks, and operational dashboards to improve observability.

Results & Impact

• System performance improved significantly, supporting high request-per-second traffic reliably.
• Reduced transaction failures and duplicate processing.
• Increased system stability during peak campaign periods.
• Enabled scalable rollout of multiple loyalty and promotional programs.

Major Modules

• Voucher Module: digital voucher issuance, redemption, and validation.
• QRIS Cashback: QRIS transaction integration and cashback calculation.
• Kickback Merchant: merchant incentive and reward distribution engine.
• Loyalty Cashback (Core Engine): BI-FAST proxy, scheduled transfers, billing registration, interbank transfers.
• Loyalty 2025: BRI Point System, Referral Program, Translator Engine x TADA.
• Merchant Lucky Ride: merchant gamification and reward campaign system.