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payments-engine

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shashankch / payflow-api

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Payflow - High-throughput, ACID-compliant payments backend built with Java 25 & Spring Boot 4. Features pessimistic locking, durable idempotency, transactional outbox, Redis caching, Kafka streaming & Spring AI.

docker kubernetes redis distributed-systems spring-boot postgresql rate-limiting event-driven cloud-native apache-kafka testcontainers idempotency resilience4j concurrent-transactions transactional-outbox pessimistic-locking acid-transactions spring-ai java-25 payments-engine
  • Updated Aug 1, 2026
  • Java

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