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A courier taps accept, waits, and gets HTTP 504. Isolating producer vs consumer vs broker, why 60 seconds is a fingerprint, and the DynamoDB putItem pattern that can wipe credentials on a hot path.
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A deep dive into how we design and ship platforms like UmaMeats—Next.js and mobile clients, Spring Boot microservices on ECS, DynamoDB, Redis GEO, Kafka with DLTs and outbox, Stripe payments and identity, CORS and auth hardening, and cost-aware deployment.- Published on
Silent swallows, missing DLQs, dual-write gaps, and no idempotency: how we hardened Kafka producers and consumers for a real order/payment pipeline.- Published on
Patterns for a delivery orchestration API: Redis GEO for driver presence, event-driven assignment, soft offers, and ops visibility—without overbuilding day one.