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Latest from Didi Tech

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Didi Tech

Dec 12, 2024 · Product Management

Key AB Testing Interview Questions and Answers for Data Science Candidates

The article reviews common AB‑testing interview questions for data‑science candidates, explaining the role of p‑values, Type I/II errors, the difference between statistical and business significance, why effects can vanish when scaling, and how to improve experiment sensitivity through larger samples, variance‑reduction methods, and careful metric design.

AB testingMDEexperiment design

0 likes · 12 min read

Key AB Testing Interview Questions and Answers for Data Science Candidates

Didi Tech

Sep 26, 2024 · Cloud Native

Didi Internationalization Site Building: Application Modeling and Cloud‑Native Delivery Framework

Didi’s international travel platform created an application‑centric, cloud‑native delivery framework that uses an OAM‑based model, KubeVela, and CUE to standardize workload descriptions, automate multi‑cloud deployment, integrate with CI/CD pipelines, and dramatically improve planning, delivery, and refactoring efficiency.

Application DeliveryInfrastructure automationKubeVela

0 likes · 24 min read

Didi Internationalization Site Building: Application Modeling and Cloud‑Native Delivery Framework

Didi Tech

Sep 19, 2024 · Cloud Native

Configuration‑as‑Code Platform for Multi‑Region Deployment: Design, Implementation and Practices

To overcome Didi’s costly, months‑long, manual multi‑region rollouts, the team built a Configuration‑as‑Code platform that isolates environment settings in a dedicated repository, enforces a versioned template with validation rules, and integrates automated placeholder substitution into CI/CD, cutting manual effort by roughly 80 % and removing coordination bottlenecks.

DevOpsconfiguration managementdeployment-automation

0 likes · 26 min read

Configuration‑as‑Code Platform for Multi‑Region Deployment: Design, Implementation and Practices

Didi Tech

Sep 12, 2024 · Cloud Native

Improving Site Build Efficiency for Didi International Travel: Architecture, Application Modeling, and Automated Delivery Framework

To cut site‑provisioning time from months to weeks for Didi International Travel, the team built an OAM‑driven, KubeVela‑based automated delivery framework that separates environment configuration, integrates Terraform, and provides a UI, achieving an 80 % reduction in manual effort while improving reliability across hybrid‑cloud environments.

KubeVelaOAMdeployment

0 likes · 29 min read

Improving Site Build Efficiency for Didi International Travel: Architecture, Application Modeling, and Automated Delivery Framework

Didi Tech

Sep 5, 2024 · Industry Insights

How Didi Built a Multi‑Protocol, Petabyte‑Scale Storage System for AI Training

Facing petabyte‑level data, billions of small files, and the need for POSIX, S3, and HDFS compatibility, Didi designed a new generation of non‑structured storage—OrangeFS—by analyzing internal systems, combining multiple storage solutions, reusing GIFT technology, and implementing a high‑performance metadata service, multi‑protocol fusion, and robust scalability features.

AI storageBig DataCloud Native

0 likes · 27 min read

How Didi Built a Multi‑Protocol, Petabyte‑Scale Storage System for AI Training

Didi Tech

Aug 15, 2024 · Mobile Development

Unify: A Framework for Efficient Flutter‑Native Hybrid Communication in Mobile Development

Unify is a Didi‑developed framework that lets developers declare Flutter‑native modules with Dart annotations, automatically generates matching Android, iOS and Flutter code, and streamlines large‑scale bidirectional communication, eliminating manual channel errors while enabling batch export of dozens of SDKs and boosting cross‑platform development efficiency.

Cross-platformFlutterHybrid Communication

0 likes · 21 min read

Unify: A Framework for Efficient Flutter‑Native Hybrid Communication in Mobile Development

Didi Tech

May 14, 2024 · Databases

Didi Elasticsearch Overview: Architecture, Deployment, Performance, and Operations

Didi’s Elasticsearch platform, built on ES 7.6 and deployed on physical machines with containerized gateway and control layers, provides a multi‑tenant, high‑performance search service—featuring a user console, operational controls, ZGC‑based latency reductions, cost‑saving compression, custom security, real‑time cross‑datacenter replication, and a roadmap toward ES 8.13.

Big DataDidiElasticSearch

0 likes · 17 min read

Didi Elasticsearch Overview: Architecture, Deployment, Performance, and Operations

Didi Tech

Apr 16, 2024 · Artificial Intelligence

Optimizing DSP Deep Model Latency by Externalizing Feature Processing with EzFeaFly

By externalizing feature processing with the EzFeaFly tool and feeding a dense index/value tensor directly to the GPU, the DSP platform decouples feature transformation from model inference, cutting instance usage by ~40%, reducing inference latency 70‑80%, and achieving over 60% end‑to‑end latency improvement while lowering costs.

DSPGPU accelerationPython

0 likes · 11 min read

Optimizing DSP Deep Model Latency by Externalizing Feature Processing with EzFeaFly

Didi Tech

Mar 28, 2024 · Big Data

How We Unified Real‑Time and Batch Features with StarRocks in Financial Risk Control

This article analyzes the challenges of building real‑time and batch risk‑control features, compares Lambda and Kappa architectures, evaluates storage‑unified and compute‑unified solutions, and details how StarRocks was selected, validated, and deployed to achieve high‑performance, low‑latency feature serving in a financial context.

Big DataReal-time AnalyticsStarRocks

0 likes · 19 min read

How We Unified Real‑Time and Batch Features with StarRocks in Financial Risk Control

Didi Tech

Mar 19, 2024 · Frontend Development

Design and Development of the Mpx‑cube‑ui Component Library for Mini‑Programs

Mpx‑cube‑ui is a cross‑platform mobile component library built on the Mpx mini‑program framework that unifies theming and reuse by organizing components into three layers—basic, basic‑business, and business—while offering hierarchical style variables, compile‑time or runtime theming, and plans to open‑source its core components for broader community adoption.

Component LibraryMpxTheme customization

0 likes · 9 min read

Design and Development of the Mpx‑cube‑ui Component Library for Mini‑Programs