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Xianyu Technology

Oct 13, 2022 · Artificial Intelligence

Design of a Generalized Recommendation Platform for Xianyu Marketplace

The article presents a generalized recommendation platform for Xianyu Marketplace that consolidates feature processing, candidate generation, recall, scoring, and experiment management into shared core components, enabling rapid onboarding of new scenarios, reducing engineering effort, and delivering over 8% CTR lift and 10% more impressions.

Xianyumachine learningonline marketplace

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Design of a Generalized Recommendation Platform for Xianyu Marketplace

Xianyu Technology

Jan 29, 2022 · Artificial Intelligence

Semantic Vector Retrieval and I2I Recall Optimization in Xianyu Search

Xianyu search recall stage upgraded from simple text matching to semantic vector retrieval using DSSM with Electra‑Small, query graph attention, and behavior‑based I2I, adding structured attributes and OCR tags, improving AUC to 0.824 and HitRate@10 to 90.1%, boosting purchase metrics by up to 4%.

Semantic SearchVector RetrievalXianyu

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Semantic Vector Retrieval and I2I Recall Optimization in Xianyu Search

Xianyu Technology

Aug 25, 2021 · Backend Development

Designing an Extensible User Identity and Benefits System: Xianyu App Case Study

The article presents a case study of Xianyu’s extensible user identity and benefits system, explaining how tiered identities grant differentiated product permissions and signal user influence, while detailing an authentication service with three extension points for condition judgment, validation, and audit handling, enabling flexible integration and unified state management.

Xianyuauthentication servicebackend development

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Designing an Extensible User Identity and Benefits System: Xianyu App Case Study

Xianyu Technology

Sep 18, 2020 · Cloud Native

Xianyu's Cloud-Native Serverless Architecture Journey

Facing monolithic bottlenecks, Alibaba’s Xianyu marketplace embarked on a four‑year serverless transformation—building a Dart FaaS layer, unifying Flutter and backend via the Nexus API, standardizing tooling with GCLI, and cutting development effort by ~30 % and bugs by ~20 %, while tackling Java heterogeneity, environment consistency, and security, and now aims to complete the migration within months.

AlibabaCloudNativeFlutter

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Xianyu's Cloud-Native Serverless Architecture Journey

Xianyu Technology

Sep 9, 2020 · Backend Development

Xianyu Product Attribute Completion Strategy

Xianyu’s new attribute completion system combines MetaQ messaging, AI image recognition, and offline option configuration to auto‑populate key product details, incentivize sellers, and iteratively refine attributes via sales metrics, boosting structured coverage by 30%, cutting verification time 70%, and raising UV‑CTR around three percent.

Xianyualgorithmattribute completion

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Xianyu Product Attribute Completion Strategy

Xianyu Technology

Aug 25, 2020 · Backend Development

Optimizing Offline Push Delivery in Xianyu's Messaging System

Xianyu improved its offline‑push delivery by fixing duplicate Agoo calls, using device IDs, classifying messages to avoid vendor quotas, prompting notification permissions, and personalizing timing and content, which raised the weak‑perception delivery rate by double‑digit percentages and set the stage for path tracing and infrastructure decoupling.

AlibabaXianyubackend optimization

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Optimizing Offline Push Delivery in Xianyu's Messaging System

Architecture Digest

Nov 19, 2019 · Cloud Computing

Evolution of Xianyu Transaction Chain Architecture: From Decoupled Frontend to Cloud‑Native One‑Stop Development

This article analyzes how Xianyu's transaction chain architecture progressed through three stages—business decoupling, dual‑end integration with Flutter, and a cloud‑native one‑stop development model—highlighting the technical decisions, challenges, and efficiency gains achieved during each phase.

FaaSFlutterXianyu

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Evolution of Xianyu Transaction Chain Architecture: From Decoupled Frontend to Cloud‑Native One‑Stop Development

Xianyu Technology

Oct 16, 2019 · Big Data

Xianyu's Complex Event Processing (CEP) System Design and Implementation

Xianyu’s Complex Event Processing system, built on Alibaba’s Blink (Flink) and a custom SQL‑like DSL, standardizes event I/O, lets users define sequence, window and aggregation rules, and combines an interactive rule service, SLS source, parser, job manager and MetaQ sink to achieve ~100 k QPS, sub‑second latency, fault‑tolerant, and rule‑to‑production turnaround in about thirty minutes.

Big DataCEPDSL

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Xianyu's Complex Event Processing (CEP) System Design and Implementation

Xianyu Technology

Jul 25, 2019 · Product Management

Design of a Gameplay System for User Engagement on Xianyu

The Xianyu team built a flexible gameplay engine that lets product define task‑based challenges, run bucket‑AB tests, and provide real‑time rewards, boosting user participation to over 70% and increasing activity by 30%, while enabling rapid iteration and future expansion across the app and other services.

AB testingXianyugameplay system

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Design of a Gameplay System for User Engagement on Xianyu

Xianyu Technology

May 17, 2019 · Backend Development

Dart Backend Practices at Xianyu: Glue Layer Development

Xianyu’s tech team adopted Dart for a backend glue layer that bridges frontend Flutter clients and Java domain services, leveraging Dart’s familiar syntax, strong async/await support, isolates for rapid hot‑replaceable development, and parallel Future.wait calls to achieve high‑performance, low‑latency APIs with fast deployment.

DartIsolateXianyu

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Dart Backend Practices at Xianyu: Glue Layer Development

Xianyu Technology

Nov 6, 2018 · Big Data

Technical Evolution of Xianyu Real-Time Selection System for Double Eleven

To meet Double‑Eleven’s sub‑second, billion‑item feed demands, Alibaba’s Xianyu selection system evolved from a Solr‑based search pipeline through offline batch and PostgreSQL attempts to a Blink‑powered real‑time stream platform using Niagara’s low‑latency LSM storage, delivering high‑throughput, personalized product feeds.

AlibabaBig DataBlink

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Technical Evolution of Xianyu Real-Time Selection System for Double Eleven

Xianyu Technology

Sep 25, 2018 · Artificial Intelligence

TensorFlow Lite Applications and UI2Code at Xianyu (Idle Fish)

Xianyu leverages a custom TensorFlow Lite framework to power AI‑driven features such as dynamic video‑cover selection, video fingerprinting, and furniture recognition for smart rentals, while its UI2Code tool transforms screenshots into pixel‑perfect production UI code, emphasizing extensibility, security, and online model updates.

TensorFlowTensorFlow LiteUI2Code

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TensorFlow Lite Applications and UI2Code at Xianyu (Idle Fish)

Xianyu Technology

Aug 31, 2018 · Artificial Intelligence

Personalized Recommendation for Xianyu Small Item Pools: Challenges and Solutions

Xianyu’s personalized recommendation system struggles with tiny, fast‑turnover item pools because traditional X2I matrices provide insufficient recall, so the team introduced pool‑specific pre‑filtering, high‑dimensional vector search, and a real‑time search‑engine recall, the latter boosting clicks by 14 % and transactions by 0.14 %.

Vector SearchXianyuengineering

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Personalized Recommendation for Xianyu Small Item Pools: Challenges and Solutions