HermesX: A Unified Push Notification Platform for Xianyu

This article introduces HermesX, the next‑generation push notification system used by Xianyu to improve user engagement and business conversion.

It starts by reviewing the limitations of the previous Hermes platform, such as fragmented push channels, inconsistent content relevance, and difficulty reproducing issues across the stack.

Four tactical upgrades are described:

Strategy 1 – Integration: Consolidates all existing push pipelines into a single, unified flow (HermesXFlowService) that standardizes the five push elements (who, when, what, how, where) and applies global frequency control.

Strategy 2 – Content Recall Optimization: Enhances algorithmic relevance, reduces abnormal request spikes, and introduces multi‑scene recall pipelines that increase content matching accuracy.

Strategy 3 – User‑Experience Optimization: Implements a four‑layer fatigue model, silent‑period handling, and separates PUSH from in‑app messages, allowing the recommendation engine to decide delivery frequency.

Strategy 4 – Management Backend: Provides a data‑driven, low‑code UI for configuring strategies, visual dashboards, and multi‑tenant support, dramatically shortening configuration cycles.

Performance gains after the overhaul include a 35% reduction in abnormal traffic, 90% drop in off‑peak anomalies, 65% lower compute consumption, and a 69% decrease in peak latency.

The article also outlines future directions such as expanding the content pool, finer‑grained user segmentation, and new service‑account features.