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Go · Intermediate · 10 h

Go for backend engineers

Types, errors as values, goroutines, channels, context and cancellation, and an HTTP service with table-driven tests.

Why employers care: Go teams expect idiomatic error handling, safe concurrency and tests from day one. Interviews often include a small concurrent program.

In the roadmaps for: Software Engineer (Backend), Blockchain Developer

Lessons, in order

  1. Errors, goroutines and contextCall several slow services at once, collect results safely, and stop waiting when a deadline passes.4 min
  2. An HTTP service with table-driven testsBuild a small link shortener with the standard library router, input validation and a mutex, and test every path with httptest.4 min