Network Switch & BIN Issuer API

The development of the BIN Issuing platform and card network required an architecture built for high availability and extreme transactional integrity. I engineered a robust backend capable of handling complex financial orchestration, utilizing advanced message brokers and queuing systems to manage asynchronous transaction flows without data loss. To ensure sub-millisecond response times for card authorizations, I implemented a sophisticated multi-layer caching strategy and optimized database indexing, allowing the system to process high volumes of concurrent requests while maintaining a strict audit trail for every cent.

Beyond the core processing engine, I built a comprehensive ecosystem to manage the entire card lifecycle. This included a high-security backoffice for user management, specialized modules for credit limit controls, and an automation layer powered by n8n to streamline operational workflows and third-party integrations. By bridging low-level financial infrastructure with a scalable, modern backend, I delivered a complete fintech solution that balances complex regulatory requirements with a seamless, high-performance user experience.