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Dada Group Technology
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Dada Group Technology

Sharing insights and experiences from Dada Group's R&D department on product refinement and technology advancement, connecting with fellow geeks to exchange ideas and grow together.

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Recent Articles

Latest from Dada Group Technology

99 recent articles
Dada Group Technology
Dada Group Technology
Sep 5, 2022 · Operations

Design and Implementation of JD.com Data Construction Platform for Testing Efficiency

This article describes the motivation, design, architecture, key features, and outcomes of JD.com's data construction platform, which automates test data creation using a Springboot‑Mybatis‑Vue stack, significantly reducing manual effort and improving testing efficiency across multiple business lines.

OperationsTesting Automationdata construction
0 likes · 9 min read
Design and Implementation of JD.com Data Construction Platform for Testing Efficiency
Dada Group Technology
Dada Group Technology
Aug 19, 2022 · Backend Development

Improving High‑Concurrency System Performance with Coroutines and the Quasar Framework

The article analyzes the high load and low CPU utilization problems of a Java service, compares various I/O models, introduces coroutine fundamentals and the Quasar library, demonstrates practical migration steps with code examples, and evaluates the performance gains and risks of adopting coroutine‑based concurrency.

BackendIO ModelQuasar
0 likes · 19 min read
Improving High‑Concurrency System Performance with Coroutines and the Quasar Framework
Dada Group Technology
Dada Group Technology
Aug 10, 2022 · Databases

Evolution of JD.com Delivery Review System Architecture and Storage Strategy

This article details the JD.com delivery review system's business scenarios, architectural evolution from a MySQL‑based design to a diversified storage stack using HBase, Redis, Elasticsearch and TiDB, and discusses the performance challenges, solutions, and future outlook for scalable, high‑availability data management.

HBaseScalabilityTiDB
0 likes · 15 min read
Evolution of JD.com Delivery Review System Architecture and Storage Strategy
Dada Group Technology
Dada Group Technology
Jul 29, 2022 · Mobile Development

Network AOP Approaches for iOS Apps: Comparison and Implementation in Dada Express

To enable encrypted transmission and traffic monitoring across multiple iOS apps with diverse networking frameworks, this article compares several network AOP solutions—including AFNetworking, Moya, custom frameworks, runtime method swizzling, and NSURLProtocol—evaluates their pros and cons, and details the chosen NSURLProtocol-based implementation with plugin architecture.

AFNetworkingMoyaNSURLProtocol
0 likes · 11 min read
Network AOP Approaches for iOS Apps: Comparison and Implementation in Dada Express
Dada Group Technology
Dada Group Technology
Jul 28, 2022 · Mobile Development

How to Shrink Android APK Size: Proven Strategies and Tools

This article details a comprehensive, step‑by‑step approach to reducing Android APK size—including library pruning, resource compression, class file optimization, and automated monitoring—to keep app packages lightweight and prevent size regression over successive releases.

APKAndroidApp Size
0 likes · 14 min read
How to Shrink Android APK Size: Proven Strategies and Tools
Dada Group Technology
Dada Group Technology
Jul 18, 2022 · Backend Development

Design and Implementation of JD Daojia Open Platform Services

The article presents a comprehensive overview of JD Daojia's Open Platform, detailing its service lifecycle—from platform introduction, service design, publishing, and authorization to state management and traffic‑control mechanisms—while explaining the underlying RPC‑based architecture and fixed‑window rate‑limiting algorithm.

Backend DevelopmentOpen PlatformService Architecture
0 likes · 12 min read
Design and Implementation of JD Daojia Open Platform Services
Dada Group Technology
Dada Group Technology
Jul 16, 2022 · Backend Development

Optimizing Rider Withdrawal Payments at Dada Express: Asynchronous Concurrency, Extended Timeouts, Idempotent Retries, and Security Enhancements

This article details how Dada Express improved the efficiency of rider withdrawal payments by redesigning the clearing and disbursement workflow, introducing asynchronous thread‑pool concurrency, extending API timeouts, implementing idempotent retry logic, and adding safeguards to ensure fund security, resulting in a three‑fold reduction in processing time during peak periods.

BackendIdempotencySystem Design
0 likes · 9 min read
Optimizing Rider Withdrawal Payments at Dada Express: Asynchronous Concurrency, Extended Timeouts, Idempotent Retries, and Security Enhancements
Dada Group Technology
Dada Group Technology
Jun 20, 2022 · Information Security

Design and Implementation of JD Daojia Security Operations Center (SOC) Platform

This article details the challenges, design choices, deployment steps, detection model creation, data processing, visualization, and future plans of JD Daojia's security operations platform, highlighting the use of Graylog, Elasticsearch, and MongoDB to achieve scalable, real‑time threat detection and response.

Data visualizationGraylogSOC
0 likes · 16 min read
Design and Implementation of JD Daojia Security Operations Center (SOC) Platform
Dada Group Technology
Dada Group Technology
Jun 15, 2022 · Mobile Development

Design and Implementation of JD Daojia Precise Exposure Tracking System

This document details the background, architecture, new precise exposure system, technical challenges, iOS implementation, visualization tools, and achieved results of JD Daojia's mobile data‑tracking platform, highlighting how a three‑layer design and automated validation improve accuracy, reduce development cost, and streamline testing.

Exposure TrackingSystem Architecturedata validation
0 likes · 17 min read
Design and Implementation of JD Daojia Precise Exposure Tracking System