Building Credit Card Authorizers with Java
This course teaches building reliable credit card authorizers in Java, covering ISO 8583 message handling, low-latency TCP servers, concurrency optimisation, routing logic, fraud detection integration, error handling, security, logging, metrics, and deployment strategies for scalable payment systems under real-world conditions.

flexible workload of 4 to 360h
valid certificate in your country
What will I learn?
Gain expertise in developing high-performance credit card authorizers using Java. Learn ISO 8583 standards, message parsing, low-latency TCP server implementation, concurrency tuning, routing and authorisation logic design, integration with simulated issuers and fraud systems, plus robust error handling, security measures, logging, metrics, and deployment for a production-ready prototype.
Elevify advantages
Develop skills
- Master ISO 8583 message parsing, building, validation, and testing in Java.
- Design high-performance, low-latency TCP servers for payment processing.
- Develop credit card authorisation logic including routing and response mapping.
- Optimise concurrent pipelines for decode, authorise, and encode operations.
- Implement production features like logging, metrics, security, and deployment.
Suggested summary
Before starting, you can change the chapters and the workload. Choose which chapter to start with. Add or remove chapters. Increase or decrease the course workload.What our students say
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