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I have a question.

What's the correct term?

Back-end, Back end or Backend

  • I'm a software back-end developer
  • I'm a software back end developer
  • I'm a software backend developer
ColleenV
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Mateo Guzmán
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3 Answers3

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I don't think you're going to be corrected or admonished for using any of these three. Google understands you perfectly no matter how you type it. Wikipedia features all three as well.

Personally, I'd write it as 'backend' or 'back end' as I'm not a fan of over-hyphenating (excuse my hypocrisy) unnecessarily.

(NGram removed)

The NGram essentially supports the argument that you'll find all three in a lot of places, and when I was Googling to test my own theories, a number of large tech sites appeared in each variation of spelling I searched for, leading me back to my first point:

Any of these is acceptable. Choose one you like and get coding.

EDIT: The NGram was misleading. Thanks for pointing that out in the comments.

JMB
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    The Ngram is misleading, as back end can refer to the literal back end of a town, or a house, or other things where you would not use backend. Pairing it with developer or software or some such would be a closer approximation. – choster Jan 27 '17 at 21:14
  • I hate ngram. It is only useful in limited cases. Right. – Lambie Jan 27 '17 at 22:34
  • I don't "hate" ngrams, but I don't like this one. I don't see how a spike in back end around 1900 pertains to software developers. – J.R. Jan 27 '17 at 22:44
  • That's the problem. They are useless for style issues. Editors decide style; not algorithms. – Lambie Jan 27 '17 at 23:59
  • @Lambie - “Useless?” I wouldn’t go that far, especially if you look beyond the pretty graph and click on the links to see the actual usages. You can find a lot of reliable, contextual examples by doing that. – J.R. Jan 29 '17 at 10:16
  • @J. R. But it doesn't answer the question, does it? For me, only a human being can answer a style question. Not a machine. The machine can offer up samples but cannot argue why one or the other might be best. – Lambie Jan 29 '17 at 16:36
  • lulz @ "wikipedia uses..." – MmmHmm Mar 31 '18 at 03:47
  • Google Trends strongly seems to favor "backend" so even though I agree any option will work that one might be most common? Then again I will admit I'm not sure if the results are thrown off because the algorithm behind it favors single words in general over terms made of multiple words. – Jeroen Apr 27 '22 at 14:01
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You can

  1. Spell it as back end when used as a noun, as for example "I am working on the back end of a project", and
  2. Spell it as back-end when used as an adjective, as for example "The back-end technologies for this project will be Apache, MySQL and PHP."

Hyphenating compound adjectives is common in English, and both the links above use the hyphenated form for adjectival use.

Having said that, I agree that many software developers won't know the difference or care: if it doesn't show as a spelling error when typed into a computer, there is no problem. And if "backend" fails this test many will assume it's not in the computer's dictionary by accident.

traktor
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    Thanks for pointing out possible differences for using a word as noun or adjective! – Sybille Peters Jan 04 '19 at 13:46
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    For clarity, if you were to say non in front of back end would it be best to use backend instead so it is understood that it is not non-back end, but rather non-backend? – ConstantFun Apr 30 '20 at 09:44
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From the Microsoft Style Guide:

back end, back-end

Don't use if you can substitute a more specific term, such as server, operating system, database, or network.

Two words as a noun. Hyphenate as an adjective.

Antônio Medeiros
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