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Youzan Coder
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Youzan Coder

Official Youzan tech channel, delivering technical insights and occasional daily updates from the Youzan tech team.

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Recent Articles

Latest from Youzan Coder

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Youzan Coder
Youzan Coder
Jan 12, 2022 · R&D Management

R&D Concentration: A Leading Indicator for Development Efficiency

The article introduces R&D Concentration—a composite metric that combines project workload, development cycle length, and participant count to serve as a real‑time, leading indicator of development efficiency, illustrated through scenarios and case studies that show how higher concentration reflects better resource focus and faster delivery.

MetricR&D efficiencyproductivity
0 likes · 13 min read
R&D Concentration: A Leading Indicator for Development Efficiency
Youzan Coder
Youzan Coder
Dec 31, 2021 · Backend Development

Applying Domain-Driven Design (DDD) in Youzan Credit Core System

Applying Domain‑Driven Design to Youzan’s Credit Core System involved consulting experts, mapping loan processes, using four‑color modeling to define documents, participants, roles and data, establishing bounded contexts, designing sub‑domains with use‑case diagrams, and adopting a layered (often hexagonal) architecture to ensure maintainable, scalable microservices.

DDDDomain ModelingDomain-Driven Design
0 likes · 6 min read
Applying Domain-Driven Design (DDD) in Youzan Credit Core System
Youzan Coder
Youzan Coder
Dec 28, 2021 · Mobile Development

Improving Mobile Quality at Youzan: Practices, Challenges, and Solutions

Youzan boosted mobile product reliability by instituting proactive anomaly detection, rigorous unit‑testing and CI, a disciplined betterMR review workflow, and dedicated performance monitoring to meet offline and hardware constraints, cutting incident volume to one‑third and fostering a virtuous cycle of stability and team morale.

code reviewcontinuous integrationmobile development
0 likes · 20 min read
Improving Mobile Quality at Youzan: Practices, Challenges, and Solutions
Youzan Coder
Youzan Coder
Dec 22, 2021 · Big Data

3rd Youzan Big Data Technology Salon: Apache Kylin4, Data Governance, and AI Applications

The 3rd Youzan Big Data Technology Salon, held online for over 200 participants, showcased Apache Kylin 4’s performance boost, GeTui’s five‑step AI method, Kwai’s sustainable data‑governance system, and Youzan’s intelligent copy algorithms, highlighting data governance’s evolution into a core business priority and the shift toward intelligent discovery.

Apache KylinData Intelligencebig-data
0 likes · 6 min read
3rd Youzan Big Data Technology Salon: Apache Kylin4, Data Governance, and AI Applications
Youzan Coder
Youzan Coder
Dec 17, 2021 · Big Data

Upgrading Real-Time Computing Engine from Flink 1.10 to 1.13: Practices and Challenges

Youzan upgraded its real‑time computing engine from Flink 1.10 to 1.13 to meet rising SQL and containerization demands, gaining enhanced SQL syntax, time‑function handling, Window TVF standardization, Hive integration, K8s stability, elastic scaling, richer Kafka and format support, improved metrics and debugging tools, and successfully migrated all custom connectors, UDFs, and SQL jobs to the new Kubernetes‑based platform.

ContainerizationFlinkK8s
0 likes · 22 min read
Upgrading Real-Time Computing Engine from Flink 1.10 to 1.13: Practices and Challenges
Youzan Coder
Youzan Coder
Dec 8, 2021 · Big Data

How to Build a Real‑Time Data Quality Monitoring System with Flink

This article outlines a comprehensive approach to monitoring and ensuring the accuracy and timeliness of real‑time data streams, detailing background challenges, solution design, implementation steps using Flink and automated testing, alert handling procedures, and future improvement plans.

Data qualityFlinkalerting
0 likes · 10 min read
How to Build a Real‑Time Data Quality Monitoring System with Flink
Youzan Coder
Youzan Coder
Nov 23, 2021 · Mobile Development

Optimizing Mobile Barcode Scanning Performance: From ZXing Tuning to Deep Learning‑Based Barcode Region Detection

By profiling the Youzan app’s ZXing pipeline, eliminating costly image rotation and format conversions, restricting decoding to the two most common 1‑D types, and adding a lightweight deep‑learning barcode‑region detector, scan latency fell from 4.1 s to 1.5 s and success rose from 91 % to 97 %.

Barcode ScanningMobile OptimizationZxing
0 likes · 15 min read
Optimizing Mobile Barcode Scanning Performance: From ZXing Tuning to Deep Learning‑Based Barcode Region Detection
Youzan Coder
Youzan Coder
Nov 19, 2021 · Mobile Development

Mastering iOS Symbolication: From Crash Logs to Source Code

This article explains the concept, principles, and practical steps of iOS symbolication, covering crash log processing, address translation, ASLR handling, function‑start and nlist tables, DWARF debugging information, and essential Xcode command‑line tools for accurate source‑level debugging.

ASLRDWARFPerformance
0 likes · 32 min read
Mastering iOS Symbolication: From Crash Logs to Source Code