Architecture for payment systems that can't go down.

Rebuilt the gateway in front of the wallet platform around a circuit-breaker mechanism, so it holds up through peak traffic.

• Throughput up 30%
• High availability held through peak traffic periods
• E-money and e-wallet integrations with multiple external parties, secured and scalable

Two products that extended Blibli's fintech ecosystem and gave merchant partners a way to manage their funds.

• Fund management for thousands of merchant partners
• A core internal framework that cut project setup time
• Pre- and post-development architecture documentation that sped up onboarding

A unified API that standardizes payment flows across internal services and hands execution to specialized payment teams.

• A monitoring and dispute-resolution platform that reduced manual audit cycles
• High-latency code paths refactored to take more peak load at no extra infrastructure cost
• Technical Decision Records, plus end-to-end tests for payment state transitions

Mission-critical card management systems for clients, built for uptime and PCI-DSS compliance.

• 6× faster sequence-number generation under high concurrency, with database contention removed
• Container images 45% smaller, giving faster CI/CD and lower cloud cost
• A standard Spring Boot boilerplate that keeps all 8 teams architecturally consistent