Golang

In Python, undeclared variables don’t exist. In Java, local variables can’t be used before assignment. In Go, declaration creates a valid value. There is no uninitialized state - every value works from the moment it’s declared.

You write a struct with a Write method. Three months later, you discover it implements io.Writer. You never declared this. How did it happen? Exploring Go’s implicit interfaces and the power of accidental implementation.

In Python, everything is an object. In Java, everything is a class. In Go, everything is a value. These are fundamental design philosophies that shape how you write concurrent code, manage memory, and reason about performance.

The Go compiler decides whether your values live on the stack or heap through escape analysis. Understanding this mechanism explains Go’s performance characteristics and helps you write faster code without sacrificing clarity.

Needed offline GCP Secret Manager testing for CI/CD pipelines. Existing solutions were either too heavy or incomplete. Built a standalone gRPC emulator that works with the official Go SDK–zero credentials, zero network calls, 100% local.

Protocol Buffers (protobuf) is Google’s binary serialization format - smaller, faster, and type-safe compared to JSON. Learn what protobuf is, how it works, and when to use it for APIs and microservices.

Started with Bitwarden-only shell scripts. Needed to support 1Password and pass without breaking anything. Built a shell abstraction layer, then ported it to Go. Same interface, three backends, zero breaking changes.

Stop returning errors as plain text. Learn how to implement consistent, structured HTTP error responses in Go with support for Chi router, Gin framework, and Echo framework. Includes field-level validation and trace IDs.