Programmers know the benefits of everything and the trade-offs of nothing.
— Rich Hickey (creator of Clojure)
I believe that feature flags are an essential part of modern product development. But, every architectural choice represents a trade-off; and, so do feature flags. While they do create a lot of value, that value comes at a cost—both literal and figurative.
Whether you're building your own feature flags implementation or you're using a third-party vendor, feature flags cost money. You're either paying for development time and hosting if you build your own implementation; or, you're paying for usage and seats if you buy a managed solution.
In 2023, I published a book titled, "Feature Flags: Transform Your Product Development Workflow". This book contains everything that I've learned over the last 7 years about integrating feature flags into my product development. But, a static book can only take you so far. In an effort to make the book more interactive, I've created a series of blog posts—one per chapter—that provide a place in which the readers and I can discuss the content. You can purchase the book and / or read a preview of each chapter on the book's mini-site. Feel free to leave a question or a comment down below.
- Of Outages And Incidents
- The Status Quo
- Feature Flags, An Introduction
- Key Terms And Concepts
- Going Deep On Feature Flag Targeting
- The User Experience (UX) Of Feature Flag Targeting
- Types Of Feature Flags
- Life-Cycle Of A Feature Flag
- Use Cases
- Server-Side vs. Client-Side
- Bridging The Sophistication Gap
- Life Without Automated Testing
- Ownership Boundaries
- The Hidden Cost Of Feature Flags
- Not Everything Can Be Feature Flagged
- Build vs. Buy
- Track Actions, Not Feature Flag State
- Logs, Metrics, And Feature Flags
- Transforming Your Company Culture
- People Like Us Do Things Like This
- Building Inclusive Products
- An Opinionated Guide To Pull Requests (PRs)
- Removing The Cost Of Context Switching
- Measuring Team Productivity
- Increasing Agility With Dynamic Code
- Product Release vs. Marketing Release
- Getting From No To Yes
- What If I Can Only Deploy Every 2 Weeks?
- I Eat, I Sleep, I Feature Flag