Machine Learning Engineering Blog & Guides

Deep dives into ML systems at scale. Case studies from top tech companies, design patterns, and practical guides for machine learning engineers.

Featured Articles

Case Studies

Deep dives into ML systems at top tech companies

21 articles

Deep Neural Networks for YouTube Recommendations: A Complete Guide

Learn how YouTube uses deep neural networks to power its recommendation system serving billions of users. Explore the two-stage architecture, candidate generation, and ranking models.

12 min |
YouTuberecommendations

LinkedIn's MixLM: Achieving 10x Faster LLM Ranking via Embedding Injection

Discover how LinkedIn achieved 10x faster LLM-based ranking using their innovative MixLM architecture with embedding injection techniques.

10 min |
LinkedInLLM

Building LinkedIn's Semantic Search: From Keywords to Understanding

Explore how LinkedIn transformed its job search from keyword matching to semantic understanding using embeddings and neural retrieval.

11 min |
LinkedInsemantic search

xAI Recommendation System: Deep Dive into Grok's Content Understanding

An in-depth analysis of xAI's recommendation system architecture powering Grok's personalized content delivery.

9 min |
xAIrecommendations

Meta's GEM: Bringing LLM-Scale Architectures to Ads Recommendation

How Meta integrated LLM-scale architectures into their ads recommendation system through the GEM (Generative Embeddings Model) framework.

13 min |
Metaads

Engineering Airbnb's Embedding-Based Retrieval System

A comprehensive guide to how Airbnb built their embedding-based retrieval system for search and recommendations.

11 min |
Airbnbembeddings

vLLM at LinkedIn: Optimizing LLM Inference at Scale

How LinkedIn leveraged vLLM to achieve efficient LLM inference for their GenAI platform serving millions of requests.

10 min |
LinkedInvLLM

Deep Dive into Memory for LLMs: Architectures and Implementations

Explore the various memory architectures for LLMs including Mem0, MemGPT, and other approaches to extending LLM context.

14 min |
LLMmemory

Pinterest Recommendation System: Evolution Through the Years

Trace the evolution of Pinterest's recommendation system from early heuristics to modern deep learning approaches.

12 min |
Pinterestrecommendations

Long Sequence Modeling for Recommendation Systems

How to effectively model long user behavior sequences for better recommendations using transformers and efficient attention.

13 min |
recommendationstransformers

How LinkedIn Built Its GenAI Platform: Architecture and Lessons

Inside look at LinkedIn's GenAI platform architecture, covering model serving, prompt management, and production deployment.

11 min |
LinkedInGenAI

Compound AI Systems: Building Beyond Single Models

Learn how to architect compound AI systems that combine multiple models, retrievers, and tools for complex tasks.

12 min |
compound AIarchitecture

Near Real-Time Personalization at LinkedIn: The Feature Store Approach

How LinkedIn achieves near real-time personalization using their online feature store architecture.

10 min |
LinkedInpersonalization

TikTok's Real-Time Recommendation Algorithm: Scaling to Billions

How TikTok's recommendation algorithm processes billions of videos to deliver personalized content in real-time.

14 min |
TikTokrecommendations

Uber's Optimal Feature Discovery for Machine Learning

How Uber automatically discovers and ranks the most important features for their ML models at scale.

11 min |
Uberfeature engineering

Netflix ML Platform: Media Understanding at Scale

Inside Netflix's ML platform for media understanding including video analysis, content tagging, and personalization.

13 min |
NetflixML platform

Reddit's ML Model Deployment and Serving Architecture

How Reddit deploys and serves machine learning models for content ranking, recommendations, and moderation.

10 min |
RedditML deployment

Meta AI Platform: Building ML Infrastructure at Meta Scale

Inside Meta's AI platform infrastructure supporting training and serving for billions of users.

14 min |
MetaAI platform

DoorDash ML Monitoring: Building Observability for ML Systems

How DoorDash monitors their ML systems to ensure reliability and catch issues before they impact customers.

11 min |
DoorDashmonitoring

Uber's Continuous Model Deployment: ML DevOps at Scale

How Uber implements continuous deployment for ML models with automated validation and safe rollouts.

12 min |
UberML deployment

Wait Time Prediction at Yelp: Practical ML for Real-Time Estimates

How Yelp built their wait time prediction system to help diners plan their restaurant visits.

10 min |
Yelpprediction

Design Patterns

Architectural patterns and best practices for ML systems

10 articles

Towards Large-Scale Generative Ranking in Machine Learning

Explore how generative models are transforming ranking systems from discriminative to generative approaches.

12 min |
generative rankingLLM

Production ML: A Reality Check on MLOps Practices

Honest assessment of what works and what doesn't in MLOps based on real-world production experience.

11 min |
MLOpsproduction

Agent Context Engineering: Optimizing LLM Agent Performance

Learn how to engineer context effectively for LLM agents to improve task completion and reduce hallucinations.

13 min |
agentsLLM

Two Tower Models in Industry: Complete Implementation Guide

Comprehensive guide to implementing two-tower models for retrieval including training, serving, and optimization.

14 min |
two-towerembeddings

RLHF with Rubrics as Rewards: A Practical Approach

How to use structured rubrics instead of human preferences for more consistent and interpretable RLHF.

11 min |
RLHFrubrics

Late Interaction Retrieval Methods: ColBERT and ColPali Explained

Understanding late interaction retrieval methods including ColBERT and ColPali for efficient semantic search.

11 min |
ColBERTretrieval

Feature Stores in an Embedding World: Modern Architecture

How feature stores are evolving to support embedding-based ML systems with vector storage and real-time updates.

12 min |
feature storeembeddings

Testing Machine Learning Systems: A Comprehensive Guide

Strategies and patterns for testing ML systems including unit tests, integration tests, and model validation.

13 min |
testingML

Active Learning in Machine Learning: Efficient Data Labeling

How to use active learning to reduce labeling costs while maintaining model quality through intelligent sample selection.

10 min |
active learninglabeling

Evaluating Ranking Models: Offline and Online Metrics

Complete guide to evaluating ranking models including offline metrics, online experiments, and bridging the gap.

12 min |
rankingevaluation

All Articles

Case Study

Deep Neural Networks for YouTube Recommendations: A Complete Guide

Case Study

LinkedIn's MixLM: Achieving 10x Faster LLM Ranking via Embedding Injection

Case Study

Building LinkedIn's Semantic Search: From Keywords to Understanding

Case Study

xAI Recommendation System: Deep Dive into Grok's Content Understanding

Case Study

Meta's GEM: Bringing LLM-Scale Architectures to Ads Recommendation

Case Study

Engineering Airbnb's Embedding-Based Retrieval System

Case Study

vLLM at LinkedIn: Optimizing LLM Inference at Scale

Case Study

Deep Dive into Memory for LLMs: Architectures and Implementations

Case Study

Pinterest Recommendation System: Evolution Through the Years

Case Study

Long Sequence Modeling for Recommendation Systems

Case Study

How LinkedIn Built Its GenAI Platform: Architecture and Lessons

Case Study

Compound AI Systems: Building Beyond Single Models

Case Study

Near Real-Time Personalization at LinkedIn: The Feature Store Approach

Case Study

TikTok's Real-Time Recommendation Algorithm: Scaling to Billions

Case Study

Uber's Optimal Feature Discovery for Machine Learning

Case Study

Netflix ML Platform: Media Understanding at Scale

Case Study

Reddit's ML Model Deployment and Serving Architecture

Case Study

Meta AI Platform: Building ML Infrastructure at Meta Scale

Case Study

DoorDash ML Monitoring: Building Observability for ML Systems

Case Study

Uber's Continuous Model Deployment: ML DevOps at Scale

Case Study

Wait Time Prediction at Yelp: Practical ML for Real-Time Estimates

Pattern

Towards Large-Scale Generative Ranking in Machine Learning

Pattern

Production ML: A Reality Check on MLOps Practices

Pattern

Agent Context Engineering: Optimizing LLM Agent Performance

Pattern

Two Tower Models in Industry: Complete Implementation Guide

Pattern

RLHF with Rubrics as Rewards: A Practical Approach

Pattern

Late Interaction Retrieval Methods: ColBERT and ColPali Explained

Pattern

Feature Stores in an Embedding World: Modern Architecture

Pattern

Testing Machine Learning Systems: A Comprehensive Guide

Pattern

Active Learning in Machine Learning: Efficient Data Labeling

Pattern

Evaluating Ranking Models: Offline and Online Metrics

career

Getting Into Machine Learning in 2026: A Practical Roadmap

career

Negotiating ML Engineering Offers: A Complete Guide

career

Technical Debt in ML Systems: Why the Interest Rate is So High

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