Wix Engineering Blog

Introduction For years, one of React’s most persistent performance pain points has been hydration. At Wix, where we render hundreds of millions of websites using React and SSR, we’ve experienced this problem at scale. SSR initially gave us everything we wanted - instant paint, great SEO, and full-site CDN caching. Our pages loaded faster than ever. But as sites grew richer and heavier with content, hydration became a tax we could no longer ignore. The more components a page h

Introduction  At Wix Emails we are working towards building a world-class email marketing platform along with an intuitive, fast, and reliable automated emails system. We care deeply about the quality of our products and work hard towards building a system that the users can count on. Thus, when we saw a strange but occasional error some time ago it was not a question of whether users noticed it and whether we should wait until enough people complained. We needed to fix it im

Please notice: This is Part 3 of a series of articles by Zachi Nachshon : Read the Part 1 to learn how Wix began migrating 60 codebases into a 22GB backend monorepo, and what we learned along the way. Read the Part 2 to learn how Wix reduced build durations, optimized target selection with a graph-based approach, and streamlined monorepo checks. The Local Development Bottleneck When working with a 22GB monorepo locally, we encountered several challenges, including: Git perf

Packed with engineering insights, developer stories, and tools to help you build better, faster, and smarter. Don't miss it, subscribe here . This month, we’re diving into cost-cutting wins, platform resilience, AI-powered coding, and productivity tips. Here’s what’s inside: 1. Leading Through Uncertainty: How Wix Engineering Navigates Growth, AI, and the Unknown Leadership begins where the playbooks end. When markets shift, technologies rewrite themselves, or new paradigms l

"We’ve entered the AI age. Bold and strong leadership isn't just an advantage, it's a necessity!" - Aviran Mordo Introduction: When The...

In Part 1 ( read here ), we shared how we built the foundations for cost-efficiency at Wix’s data platform: creating visibility into...

Packed with engineering insights, developer stories, and tools to help you build better, faster, and smarter. Don't miss it, subscribe...

Introduction At Wix, we are constantly evolving our data infrastructure to stay ahead of the curve. As our data workloads grew, we wanted...

Hi, I’m Ben Chen, an Engineering Group Manager at Wix. Over the years, my team and I have faced countless challenges managing one of the...

In this post, we share the journey of optimizing the data platform at Wix, which led to a 50% reduction in monthly data platform costs ....

What does it take to lead through chaos, scale engineering teams, and navigate one of the biggest technological shifts of our time? Watch...

Before You Read If you haven’t read our previous article  - " Solving Data Discovery at Scale: How Wix Uses RAG and Multi-Agent Systems...

Please notice : This is Part 2 of a series of articles by Zachi Nachshon . Read the Part 1 to learn how Wix began migrating 60...

The Challenge  Retrieval-Augmented Generation (RAG) has emerged as one of the most important design patterns in modern AI systems,...

Wix’s AI journey began with bold exploration of a fast-evolving technology - and developed into a clear, company-wide strategy. In this...

How do we scale Wix and still keep dev velocity and standards? Tomer Pilossof (Head of DevEx) and Ethan Pogrebizsky (CTO of DevEx)...

At Wix, we faced a challenge that will sound familiar to many developers: managing an ever-growing backend codebase spread across 60...

Introduction In the first part of this article (Introducing PlatySpark: How Wix Built the Ultimate Spark-as-a-Service Platform - Part 1)...

The Challenge Managing Apache Spark applications at scale can be a daunting task, especially for large organizations with multiple data...

Introduction Data discovery is a critical challenge in modern organizations, particularly for those adopting a data mesh approach . As...

We, the production engineers, are probably all very familiar with this scenario : Your TL : "Can you tell me which instance type is used...

The AI era is no longer a distant horizon - it’s here, reshaping how we build, design, and collaborate. At Wix, we’re not just keeping...

Why Tests Are the Backbone of Healthy Projects In the world of software development, testing is not just a formality; it's a lifeline....

Microservices Reliability Playbook, 2025: You can find the link to download the full PDF at the bottom of this post The Microservices...