jPOS and jPOS-EE 3.0.2 add security fixes, structured transaction tracing, ISO 8583:2023 support, and stronger database and QRest reliability.

The final installment of the Accounting Applied to Payment Methods series, completing the MiniGL and double-entry accounting training for payment-system engineers.

Continue the MiniGL training series with practical double-entry accounting concepts for engineers building issuing and acquiring payment systems.

Learn how MiniGL brings scalable double-entry accounting to jPOS, jCard, and jPTS in the first part of this payment-engineering series.

Configure jPOS timeouts, reconnect delays, socket keep-alive, and queue expiration to improve channel reliability and transaction handling.

Configure jPOS 3 monitoring with Docker Compose, Prometheus, and Grafana, including metrics endpoints, dashboards, and persistent storage.

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Explore how modular API layers allow seamless integration between acquirers, issuers, and logic.

See how the issuing and acquiring modules communicate through unified APIs to simplify complex networks.

A jPOS 3 performance demo for ISO 20022 message processing.

jPOS 3.0.0 brings Java 23, virtual threads, Micrometer instrumentation, structured audit logging, Java modules, and security improvements to modern payment systems.