Addy Osmani

Engineering leader and senior thinker

Addy Osmani is an Irish Software Engineer and leader currently working on the Google Chrome web browser. A developer for 20+ years, he has worked at Google for over twelve years, focused on making the web low-friction for users and web developers. He is passionate about AI-assisted engineering and developer tools. He previously worked on Fortune 500 sites. Addy is the author of a number of books including Learning JavaScript Design Patterns, Leading Effective Engineering Teams, Stoic Mind and Image Optimization. You can try his recent apps.You can find him on LinkedIn, Twitter or TikTok. He's given over 175 talks worldwide. You can find Addy's writing on his blog, Substack and on LeadDev.

Books

Building Large Scale Web Apps is a toolkit to managing large-scale React applications.

React as a library allows you to start building user interfaces quickly and easily. But how do things scale as an application grows? How do you ensure that your codebase remains manageable, your performance metrics stay on point, and your team continues to work cohesively as the project evolves?

In this book, you'll uncover strategies that industry professionals use to build scalable, performant, and maintainable React applications, all without becoming overwhelmed by complexity.

Do you want to write beautiful, structured, and maintainable JavaScript by applying modern design patterns to the language? Do you want clean, efficient, manageable code? Want to stay up-to-date with the latest best practices? If so, the updated second edition of Learning JavaScript Design Patterns is the ideal place to start.

Author Addy Osmani shows you how to apply modern design patterns to JavaScript and React. That includes popular design patterns such as modules, mixins, observers, and mediators. You'll learn about performance and rendering patterns, such as server-side rendering and islands architecture. You'll also learn how modern architectural patterns—such as MVC, MVP, and MVVM—are useful from the perspective of a modern web application developer. Other essential topics include modern JavaScript syntax and React patterns such as Hooks, higher order components, and render props.

Modern Web Apps - a guide to writing high-performance React web applications by Lydia Hallie and Addy Osmani

Success at Scale is a curated collection of best-practice case studies capturing how production sites of different sizes tackle performance, accessibility, capabilities, and developer experience at scale. Case studies are from industry experts with guidance that stands the test of time.

Leading Effective Engineering Teams - a book of growth tips for engineers, tech leads and managers by Addy Osmani

Developer Experience

The Stoic Mind: By Addy Osmani and GoLimitless

In Software Engineering - The Soft Parts Addy Osmani shares lessons from his first 10 years at Google on the soft skills that can help engineers become effective and scale their effectiveness. This guidance should help junior, mid-career and even senior developers move forward, deal with changing technology, and navigate building non-trivial systems. Becoming a good engineer is about collecting experience. Each project, even small ones, is a chance to add new techniques and tools to your toolbox. Where this delivers even more value is when you can solve problems by pairing techniques learned on one project with tools learned working on another. This short book tries to capture what the soft skills are and how they can all add up.

Image Optimization by Addy Osmani. A Smashing Magazine title.

Explore many popular design patterns, including Modules, Observers, Facades, and Mediators. Learn how modern architectural patterns—such as MVC, MVP, and MVVM—are useful from the perspective of a modern web application developer. This book also walks experienced JavaScript developers through modern module formats, how to namespace code effectively, and other essential topics.

New perspectives on web design

Backbone Fundamentals

Case Studies

eBay

Netflix

Tinder

Pinterest

Treebo

YouTube

Adobe

Twitter web case study

Pictured: Addy Osmani.

Featured AI articles

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The 70% Problem in AI Coding

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Maximizing the Human 30%

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MCP: The Model Context Protocol

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Why I Use Cline for AI Engineering

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Leading Engineering Teams in the GenAI Era

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Avoiding Skill Atrophy in the Age of AI

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Vibe Coding is not an excuse for low-quality work

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What are AI Agents? why do they matter?

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Vibe Coding: Revolution or Reckless Abandon?

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AI-Driven Prototyping: v0, Bolt, and Lovable Compareda

Featured thoughts

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Critical Thinking is key

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Overcome team dysfunction

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Work is a subset of life

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Coach, mentor, sponsor

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Effective engineers

Check out more of my thoughts on LinkedIn.

Current projects

I am the engineering lead for Google Chrome's Developer Experience organization. Our projects include Chrome DevTools, Lighthouse, PageSpeed Insights and Chrome User Experience Report, Aurora and WordPress Performance. We recently shipped User Flows for DevTools and Lighthouse!. I also love side-projects.
Open-source

Projects I've contributed to include Lighthouse, Workbox, Quicklink, Guess.js, Yeoman, HNPWA, TodoMVC, Critical and Material Design Lite. You can find more on GitHub.
Podcasts

I have been on a few different podcasts recently, including PodRocket, Hanselminutes with Scott Hanselman, DevDiscuss and Smashing Podcast.
Talks

Recordings of my talks are on my YouTube channel. These include Optimize the Core Web Vitals and Cost Of JavaScript. You can find some of my slides on SpeakerDeck.
Blog

My latest blog posts can be found on my web.dev profile. My last post on here was: Cover Flow with Modern CSS: Scroll-Driven Animations in Action

Featured Videos

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Life Lessons

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Effective Engineering Teams

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Cost Of JavaScript

Check out more of my videos on YouTube.

My Network

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Instagram - Motivational Quotes

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TikTok - Music

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TikTok - Motivational Tips

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YouTube - Tutorials

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Substack - Articles