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What does "seniority" mean in programming?

seniority is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.

Definition

The level of experience, ownership, and scope of impact associated with a developer's role. Common levels are junior, mid-level, senior, staff, and principal. Higher seniority typically means broader ownership, more ambiguous problems, and cross-team influence — not just better code.

Example

"The promotion to senior wasn't about writing faster code — it was about owning the technical direction of a product area."

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