Hi! 👋 I'm Max Rozen.

I'm also known as rozenmd around the internet. I'm an ex-Atlassian, and these days I work at Cloudflare, helping build D1.

I run OnlineOrNot, a service that provides status pages and uptime monitoring for websites, APIs, and cron jobs.

I also run this blog on the side, where I write about React, and provide advice that hopefully helps improve your career as a frontend developer.

If you read something here and like it, feel free to share it and let me know!

• Books
• Articles
  • Bootstrapping OnlineOrNot
  • Lessons from building a SaaS
  • Greatest hits
  • Year in review
• Contact

Books

• useEffect By Example
  • Get the hang of using useEffect like a pro, with useEffect By Example.
  • You'll learn how to use useEffect to fetch data, and avoid pesky race conditions. Take the guesswork out of using the dependency array, and prevent infinite re-renders through the use of useCallback and useMemo, while also keeping ESLint happy.
• The Beginner's Guide to React Testing
  • Do you find yourself asking these questions when it comes to testing in React?
  • How do I get started testing?
  • What are all the React testing tools and how do I use them?
  • Which testing framework should I use (Enzyme or React Testing Library)?
  • What are the different types of tests we use in React?
  • How do I make testing a habit? What's a good level of test coverage?
  • Should I be doing test-driven development (TDD)?
  • If so, then this guide is for you.

Articles

• Browse all articles

Bootstrapping OnlineOrNot

• Building a SaaS in one week: How I built OnlineOrNot
• What I learned running a SaaS for a year
• What I learned running a SaaS for a second year
• Lessons from my third year running a SaaS

Greatest hits

• Examples of large production-grade, open-source React apps
• Understanding useState's initial value
• Preventing infinite re-renders when using useEffect and useState
• Fetching Data in React with useEffect

Year in review

• 2023: Focusing on a single product pays off
• 2022: Just keep shipping
• (2021) Strangers from the internet paid for my MacBook Air: on my 4th year of indiehacking
• (2020) Indiehacking: a review of my 3rd year
• 2019: Further reflections on trying to start an internet business
• 2018: Reflections on trying to start an internet business

Contact

If you'd like to get in touch with me, email and mastodon are your best bets.

I'm also on twitter.