We Killed `interface{}` From a Go Codebase. Here's What Replaced It

📰 Dev.to · Gabriel Anhaia

Learn how to replace interface{} in Go with generics, small interfaces, and typed structs for better code quality

intermediate Published 29 Apr 2026
Action Steps
  1. Identify uses of interface{} in your Go codebase
  2. Replace interface{} with generics where possible
  3. Create small consumer-side interfaces for specific use cases
  4. Use typed structs to add type safety
  5. Refactor code to use the new replacements
Who Needs to Know This

Go developers and teams maintaining large Go codebases can benefit from this approach to improve code readability and maintainability

Key Insight

💡 Using generics, small interfaces, and typed structs can simplify Go code and improve maintainability

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💡 Replace interface{} in Go with generics, small interfaces, and typed structs for better code quality

Key Takeaways

Learn how to replace interface{} in Go with generics, small interfaces, and typed structs for better code quality

Full Article

200+ uses of any in one Go codebase, three patterns under the hood. Generics, small consumer-side interfaces, and typed structs replaced almost all of it.
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