Show HN: Connection-Agnostic Presence Tracking for Distributed Back End

Category: infrastructure

Tags: presence-tracking, distributed-systems, redis, stateless-backends, iot

Score: 4.3/10 (Innovation: 5, Technical: 3, Documentation: 5, Utility: 5)

This paper presents a theoretical design for tracking device online/offline presence in stateless distributed backends using a sharded Redis sorted set with expiry deadlines. It avoids lossy pub/sub and imprecise TTLs by having an independent runner pull stale entries and emit offline events, providing a retryable artifact. The approach is novel but unimplemented and unbundled, limiting immediate utility.

Target audience: backend devs, devops, IoT engineers

Repository: https://zenodo.org/records/21717242

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