Wix Engineering

Wix Engineering shares a comprehensive year-in-review covering their journey building and operating at massive scale. Key themes include transitioning to AI-first development with production-ready LLM systems, platform engineering treating internal tools as products, cost optimization cutting data platform expenses by 50%, migrating to monorepo architecture for 30M+ lines of code, and reliability patterns for microservices. The review includes deep dives on Spark-as-a-Service running 5,000+ daily jobs, Kafka optimization reducing costs by 30%, RAG evaluation tools, context engineering for AI systems, and developer productivity improvements like 50× faster integration testing. Lessons span from technical implementation details to organizational transformation and engineering culture.

The Wix Engineering 2025 Review: AI, Platforms, Data, and Deep Technical Lessons-Learned

A Year of Building at Scale: Inside Wix Engineering

Building Better AI Systems (Not Just Prompts)

Vision, Architecture & the Future of Engineering

Data Discovery, Search & Knowledge at Scale

Platform Engineering, Dev Experience & Developer Productivity

Data Platforms, Spark & Cost Efficiency at Massive Scale

Infrastructure, Performance & Reliability

Engineering Culture, Guilds & Communities