Developer builds gamified habit tracker with microservices, XP streaks, and resilience-first design

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A software developer has built a habit-tracking application called Gamified Tracker that awards experience points using a formula combining activity duration, multipliers, and streak bonuses. The system is designed around a microservices architecture using Java 17 and Spring Boot 3.5, with separate services handling activity logging and gamification. A key design priority was resilience: habit logs must save successfully even if the XP or gamification layer fails, using an outbox pattern with RabbitMQ for asynchronous processing. The stack also includes Spring Cloud Gateway for routing and authentication, Netflix Eureka for service discovery, PostgreSQL for storage, and Prometheus with Grafana for observability. The developer acknowledges that a simpler monolith would suffice for current traffic, but chose the distributed setup deliberately to demonstrate and learn production-grade patterns.

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