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58 Tech

Official tech channel of 58, a platform for tech innovation, sharing, and communication.

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Recent Articles

Latest from 58 Tech

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58 Tech
58 Tech
Jul 14, 2022 · Artificial Intelligence

Image Quality Assessment Techniques and Their Application in 58.com Recruitment Image Filtering

This article reviews image quality assessment (IQA) methods—including full‑reference, reduced‑reference, and no‑reference approaches—covers typical datasets and evaluation metrics, describes CNN‑based models such as WaDIQaM, DBCNN and hyperIQA, and details a customized IQA solution deployed at 58.com to filter and rank recruitment images, achieving a reduction of bad‑image rate from 9% to 0%.

CNNIQAImage Processing
0 likes · 17 min read
Image Quality Assessment Techniques and Their Application in 58.com Recruitment Image Filtering
58 Tech
58 Tech
Jul 7, 2022 · Mobile Development

WBBlades3.0 – A Mobile Development Tool for Unused Code Detection, Package Size Analysis, and Crash Log Parsing

WBBlades3.0 is a visualized iOS development toolkit that offers unused class detection for Objective‑C and Swift, fast package‑size analysis of static libraries, point‑to‑point crash‑log parsing with symbol restoration, and static‑library dependency inspection, all designed to improve developer efficiency.

Mach-Ocrash log parsingiOS
0 likes · 7 min read
WBBlades3.0 – A Mobile Development Tool for Unused Code Detection, Package Size Analysis, and Crash Log Parsing
58 Tech
58 Tech
Jun 30, 2022 · Mobile Development

Fair 2.5.0 Release: New Features, Demo, and Usage Guide for the Flutter Dynamic Framework

The article introduces Fair 2.5.0—a Flutter‑based dynamic framework—detailing its project overview, GitHub link, version features such as Flutter 2.8.x adaptation, Dart2JS singleton support and new syntax‑sugar APIs, demo improvements, code examples, roadmap, quick‑start instructions, resources and contribution information.

Dynamic FrameworkHot Updatemobile development
0 likes · 10 min read
Fair 2.5.0 Release: New Features, Demo, and Usage Guide for the Flutter Dynamic Framework
58 Tech
58 Tech
Jun 24, 2022 · Artificial Intelligence

Reinforcement Learning for Lead Generation in Task‑Oriented Dialogue Systems

This article presents a reinforcement‑learning‑based approach to improve lead‑capture efficiency of a task‑oriented chatbot used in local services, detailing the system architecture, RL algorithms (DQN/DDQN), data construction, model training, offline and online evaluation, and the resulting commercial gains.

Customer ServiceDQNLead Generation
0 likes · 27 min read
Reinforcement Learning for Lead Generation in Task‑Oriented Dialogue Systems
58 Tech
58 Tech
Jun 16, 2022 · Artificial Intelligence

Backend Architecture and Performance Optimization of an AI Interview Robot

This article details the backend architecture, dialogue engine design, resource estimation, and performance optimization techniques of an AI interview robot used in 58.com’s recruitment platform, illustrating how multi‑branch dialogue flows, RTP communication, session management, and monitoring enable scalable, stable, and efficient online interview services.

AIDialogue EngineInterview Robot
0 likes · 17 min read
Backend Architecture and Performance Optimization of an AI Interview Robot
58 Tech
58 Tech
Jun 9, 2022 · Artificial Intelligence

Multi‑Label Image Recognition for 58.com: Algorithm Design, Data Construction, and Model Optimization

This article presents a comprehensive study of multi‑label image recognition applied to 58.com’s business scenarios, covering problem motivation, dataset construction, evaluation metrics, mainstream deep‑learning methods, an asymmetric‑loss‑based optimization pipeline, and practical output schemes for recommendation and retrieval.

Data Annotationasymmetric losscomputer vision
0 likes · 17 min read
Multi‑Label Image Recognition for 58.com: Algorithm Design, Data Construction, and Model Optimization
58 Tech
58 Tech
May 26, 2022 · Frontend Development

Advanced Timer Techniques in Frontend Development

This article examines the challenges of timer precision in front‑end scenarios such as e‑commerce flash sales, explains the limitations of native setInterval and setTimeout, and introduces a frame‑based timer using requestAnimationFrame, requestIdleCallback and compensation strategies to achieve high‑accuracy scheduling.

JavaScriptPerformanceTimers
0 likes · 19 min read
Advanced Timer Techniques in Frontend Development
58 Tech
58 Tech
May 19, 2022 · Mobile Development

Fair 2.4.0 – New Features, Architecture, Roadmap, and Quick‑Start Guide for the Flutter Dynamic Framework

The article introduces Fair 2.4.0, a Flutter dynamic framework that supports null‑safe, outlines its version features, architecture, demo updates, upcoming roadmap, hot‑update platform, provides step‑by‑step integration code, and lists resources for developers interested in mobile dynamic UI development.

Dynamic FrameworkHot Updatemobile development
0 likes · 6 min read
Fair 2.4.0 – New Features, Architecture, Roadmap, and Quick‑Start Guide for the Flutter Dynamic Framework
58 Tech
58 Tech
May 12, 2022 · Backend Development

Refactoring PHP Calls to Java Interfaces: Architecture, Code Generation, and Seamless Integration

The article details the challenges of PHP invoking Java interfaces, compares two existing solutions, and presents a comprehensive refactoring approach that automates code conversion, resolves generic parsing and sandbox debugging issues, and reduces the integration steps from eight to three for more efficient backend development.

API integrationJavaPHP
0 likes · 11 min read
Refactoring PHP Calls to Java Interfaces: Architecture, Code Generation, and Seamless Integration