Tell about relevant experience in fintech and payment systems.

In fintech and payment systems, I worked on developing high-load services for transaction processing and integration with payment gateways. My experience includes:

• Ensuring security and compliance with PCI DSS standards.
• Implementing reliable authentication and authorization mechanisms.
• Optimizing performance to minimize delays in payment processing.
• Working with distributed systems and queues to guarantee message delivery.
• Developing monitoring and alerting for quick incident response.

For example, I participated in creating a microservices architecture for a payment gateway, where Golang was used to write low-latency and highly fault-tolerant services.