Backend engineer in Porto working with Java, Kotlin, Spring Boot, AWS, Kafka, PostgreSQL, and Kubernetes.https://guesser.dev/enhttps://guesser.dev/writing/reliable-webhook-delivery/https://guesser.dev/writing/reliable-webhook-delivery/Notes from building Webhook Relay: transactional outboxes, at-least-once delivery, idempotency, retries, dead letters, replay, and request signing.Thu, 06 Aug 2026 00:00:00 GMTReliabilityEvent-driven systemsKotlinGabriel Dietrich Guesser